Emerson Roc827 Instruction Manual

ROC827 53e78454-fa14-41e9-b71b-c7c471d62f23

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Flow Computer Division

Form Number A6175

Part Number D301217X012

March 2006

ROC827 Remote Operations Controller

Instruction Manual

Issued Mar-06 ii

Revision Tracking Sheet

March 2006

This manual may be revised periodically to incorporate new or updated information. The

revision date of each page appears at the bottom of the page opposite the page number. A change

in revision date to any page also changes the date of the manual that appears on the front cover.

Listed below is the revision date of each page (if applicable):

Page Revision

Initial issue Mar-06

ROCLINK is a trademark of one of the Emerson Process Management companies. The Emerson logo is a trademark

and service mark of Emerson Electric Co. All other marks are the property of their respective owners.

www.EmersonProcess.com/flow

While this information is presented in good faith and believed to be accurate, Fisher Controls does not guarantee

satisfactory results from reliance upon such information. Nothing contained herein is to be construed as a warranty

or guarantee, express or implied, regarding the performance, merchantability, fitness or any other matter with respect

to the products, nor as a recommendation to use any product or process in conflict with any patent. Fisher Controls

reserves the right, without notice, to alter or improve the designs or specifications of the products described herein.

Issued Mar-06 iii

Contents

Chapter 1 – General Information 1-1

1.1 Scope of Manual...............................................................................................................1-1

1.2 Hardware ..........................................................................................................................1-2

1.2.1 Central Processor Unit (CPU) ............................................................................1-5

1.2.2 Processor and Memory ......................................................................................1-6

1.2.3 Real-Time Clock (RTC)......................................................................................1-6

1.2.4 Diagnostic Monitoring.........................................................................................1-7

1.2.5 Options ...............................................................................................................1-7

1.3 FCC Information ...............................................................................................................1-8

1.4 Firmware...........................................................................................................................1-8

1.4.1 Historical Database and Event & Alarm Log....................................................1-11

1.4.2 Meter Runs and Stations..................................................................................1-12

1.4.3 Flow Calculations .............................................................................................1-12

1.4.4 Automatic Self Tests ........................................................................................1-13

1.4.5 Low Power Modes............................................................................................1-13

1.4.6 Proportional, Integral, and Derivative (PID) .....................................................1-14

1.4.7 Function Sequence Table (FST) ......................................................................1-14

1.5 ROCLINK 800 Configuration Software...........................................................................1-15

1.6 DS800 Development Suite Software..............................................................................1-16

1.7 Expanded Backplane......................................................................................................1-17

1.8 Related Specification Sheets..........................................................................................1-18

Chapter 2 – Installation and Use 2-1

2.1 Installation Requirements.................................................................................................2-1

2.1.1 Environmental Requirements.............................................................................2-2

2.1.2 Site Requirements..............................................................................................2-2

2.1.3 Compliance with Hazardous Area Standards ....................................................2-3

2.1.4 Power Installation Requirements .......................................................................2-4

2.1.5 Grounding Installation Requirements.................................................................2-4

2.1.6 I/O Wiring Requirements....................................................................................2-5

2.2 Required Tools .................................................................................................................2-5

2.3 Housing.............................................................................................................................2-5

2.3.1 Removing and Replacing End Caps ..................................................................2-6

2.3.2 Removing and Installing Wire Channel Covers..................................................2-6

2.3.3 Removing and Installing Module Covers............................................................2-7

2.4 Mounting the ROC827 on a DIN Rail ...............................................................................2-7

2.4.1 Installing the DIN Rail.........................................................................................2-9

2.4.2 Securing the ROC827 on the DIN Rail...............................................................2-9

2.4.3 Removing the ROC827 from the DIN Rail .......................................................2-10

2.5 ROC800-Series Expanded Backplane (EXP) ................................................................2-10

2.5.1 Attaching an Expandable Backplane ...............................................................2-11

2.5.2 Removing an Expandable Backplane ..............................................................2-12

2.6 Central Processor Unit (CPU) ........................................................................................2-13

2.6.1 Removing the CPU Module..............................................................................2-16

2.6.2 Installing the CPU Module................................................................................2-16

2.7 License Keys ..................................................................................................................2-17

2.7.1 Installing a License Key....................................................................................2-18

2.7.2 Removing a License Key..................................................................................2-19

Issued Mar-06 iv

2.8 Startup and Operation ....................................................................................................2-19

2.8.1 Startup..............................................................................................................2-20

2.8.2 Operation..........................................................................................................2-20

Chapter 3 – Power Connections 3-1

3.1 Power Input Module Descriptions.....................................................................................3-1

3.1.1 12-Volt DC Power Input Module (PM-12)...........................................................3-1

3.1.2 24-Volt DC Power Input Module (PM-24)...........................................................3-3

3.1.3 Auxiliary Output (AUX+ and AUX–)....................................................................3-4

3.1.4 Switched Auxiliary Output (AUXSW+ and AUXSW–) ........................................3-6

3.2 Determining Power Consumption.....................................................................................3-7

3.2.1 Tuning the Configuration..................................................................................3-11

3.3 Removing a Power Input Module ...................................................................................3-20

3.4 Installing a Power Input Module .....................................................................................3-21

3.5 Connecting the ROC827 to Wiring .................................................................................3-21

3.5.1 Wiring the DC Power Input Module..................................................................3-22

3.5.2 Wiring the External Batteries............................................................................3-23

3.5.3 Replacing the Internal Battery..........................................................................3-25

3.6 Related Specification Sheets..........................................................................................3-26

Chapter 4 – Input/Output Modules 4-1

4.1 I/O Module Overview........................................................................................................4-1

4.2 Installation.........................................................................................................................4-3

4.2.1 Installing an I/O Module......................................................................................4-4

4.2.2 Removing an I/O Module....................................................................................4-5

4.2.3 Wiring I/O Modules.............................................................................................4-6

4.3 Analog Input Modules.......................................................................................................4-6

4.4 Analog Output Modules....................................................................................................4-8

4.5 Discrete Input Modules.....................................................................................................4-9

4.6 Discrete Output Modules................................................................................................4-10

4.7 Discrete Output Relay Modules......................................................................................4-11

4.8 Pulse Input Modules.......................................................................................................4-12

4.9 RTD Input Modules.........................................................................................................4-14

4.9.1 Connecting the RTD Wiring..............................................................................4-15

4.10 J and K Type Thermocouple Input Modules..................................................................4-16

4.11 Related Specification Sheets.........................................................................................4-21

Chapter 5 – Communications 5-1

5.1 Communications Ports and Modules Overview...............................................................5-1

5.2 Installing Communication Modules..................................................................................5-3

5.3 Removing a Communications Module.............................................................................5-4

5.4 Wiring Communications Modules ....................................................................................5-5

5.5 Local Operator Interface (LOI).........................................................................................5-5

5.5.1 Using the LOI .....................................................................................................5-7

5.6 Ethernet Communications................................................................................................5-7

5.7 EIA-232 (RS-232) Serial Communications ......................................................................5-9

5.8 EIA-422/485 (RS-422/485) Serial Communications Module .........................................5-10

5.8.1 EIA-422/485 (RS-422/485) Jumpers & Termination Resistors ........................5-11

Issued Mar-06 v

5.9 Dial-up Modem Communications Module......................................................................5-12

5.10 Multi-Variable Sensor (MVS) Interface Modules............................................................5-14

5.11 HART Interface Module .................................................................................................5-16

5.12 Related Specification Sheets.........................................................................................5-20

Chapter 6 – Troubleshooting 6-1

6.1 Guidelines.........................................................................................................................6-1

6.2 Checklists .........................................................................................................................6-2

6.2.1 Serial Communications ......................................................................................6-2

6.2.2 I/O Point..............................................................................................................6-2

6.2.3 Software .............................................................................................................6-3

6.2.4 Powering Up.......................................................................................................6-3

6.2.5 MVS Module.......................................................................................................6-3

6.3 Procedures .......................................................................................................................6-4

6.3.1 Preserving Configuration and Log Data.............................................................6-4

6.3.2 Restarting the ROC827......................................................................................6-4

6.3.3 Troubleshooting Analog Input Modules..............................................................6-5

6.3.4 Troubleshooting Analog Output Modules...........................................................6-7

6.3.5 Troubleshooting Discrete Input Modules............................................................6-7

6.3.6 Troubleshooting Discrete Output Modules.........................................................6-8

6.3.7 Troubleshooting Discrete Output Relay Modules...............................................6-8

6.3.8 Troubleshooting Pulse Input Modules................................................................6-8

6.3.9 Troubleshooting RTD Input Modules .................................................................6-9

6.3.10 Troubleshooting J and K Type Thermocouple Input Modules .........................6-10

Chapter 7 – Calibration 7-1

7.1 Calibration.........................................................................................................................7-1

7.2 Preparing for Calibration...................................................................................................7-1

Appendix A – Glossary A-1

Index I-1

Issued Mar-06 vi

ROC827 Instruction Manual

Issued Mar-06 General Information 1-1

Chapter 1 – General Information

This manual focuses on the hardware aspects of the ROC827 Remote

Operations Controller (the “ROC827”) and the ROC800-Series expanded

backplanes (“EXPs”). For information about the software, refer to the

ROCLINK™ 800 Configuration Software User Manual (Form A6121).

This chapter details the structure of this manual and provides an overview

of the ROC827 and its components.

In This Chapter

1.1 Scope of Manual......................................................................................1-1

1.2 Hardware .................................................................................................1-2

1.2.1 Central Processor Unit (CPU)........................................................1-5

1.2.2 Processor and Memory..................................................................1-6

1.2.3 Real-Time Clock (RTC)..................................................................1-6

1.2.4 Diagnostic Monitoring ....................................................................1-7

1.2.5 Options...........................................................................................1-7

1.3 FCC Information ......................................................................................1-8

1.4 Firmware..................................................................................................1-8

1.4.1 Historical Database and Event & Alarm Log................................1-12

1.4.2 Meter Runs and Stations .............................................................1-12

1.4.3 Flow Calculations.........................................................................1-12

1.4.4 Automatic Self Tests....................................................................1-13

1.4.5 Low Power Modes .......................................................................1-14

1.4.6 Proportional, Integral, and Derivative (PID).................................1-14

1.4.7 Function Sequence Table (FST)..................................................1-15

1.5 ROCLINK 800 Configuration Software..................................................1-15

1.6 DS800 Development Suite Software.....................................................1-17

1.7 Expanded Backplane.............................................................................1-18

1.8 Related Specification Sheets.................................................................1-19

The ROC827 Remote Operations Controller is a microprocessor-based

controller that provides the functions required for a variety of field

automation applications. The ROC827 is ideal for applications requiring

general logic and sequencing control; historical data archiving; multiple

communication ports; Proportional, Integral, and Derivative (PID) control;

and flow measurement on up to twelve meter runs. When attached to the

ROC827, the ROC800-Series expanded backplanes provide the ROC827

with increased I/O capabilities.

1.1 Scope of Manual

This manual contains the following chapters:

Chapter 1

General Information Provides an overview of the hardware and

specifications for the ROC827 and the ROC800-Series

expanded backplane.

ROC827 Instruction Manual

Issued Mar-06 General Information 1-2

Chapter 2

Installation and Use Provides information on installation, tools, wiring,

mounting the ROC827, and other essential elements of

the ROC827 and EXPs.

Chapter 3

Power Connections Provides information on the Power Input modules

available for the ROC827 and EXPs and provides

worksheets to help determine power requirements for

the ROC827 configurations.

Chapter 4

Input/Output (I/O)

Modules

Provides information for the Input/Output (I/O) modules

available for the ROC827 and EXPs.

Chapter 5

Communications Provides information for the built-in communications

and the optional communication modules available for

the ROC827.

Chapter 6

Troubleshooting Provides information on diagnosing and correcting

problems for the ROC827.

Chapter 7

Calibration Provides information for calibrating Analog Inputs,

HART Inputs, RTD Inputs, and MVS Inputs for the

ROC827.

Glossary Provides definitions of acronyms and terms.

Index Provides an alphabetic listing of items and topics

contained in this manual.

1.2 Hardware

The ROC827 is highly innovative and versatile with an integrated

backplane to which the central processor unit (CPU), Power Input module,

communication modules, and I/O modules connect. The ROC827 has

three I/O module slots.

The ROC800-Series expanded backplane (EXP) attaches to the ROC827.

Each EXP provides six additional I/O module slots. The ROC827 can

support up to four EXPs, for a total of 27 I/O module slots in a fully

configured ROC827 (six slots per EXP plus the three I/O slots on the

ROC827 itself).

The ROC827 uses a Power Input module to convert external input power

to the voltage levels required by the ROC827’s electronics and to monitor

voltage levels to ensure proper operation. Two Power Input modules—12

Volts dc (PM-12) and 24 Volts dc (PM-24)—are available for the

ROC827. For more information on the Power Input modules, refer to

Chapter 3, Power Connections.

The ROC827 supports a variety of communication protocols: ROC Plus,

Modbus, Modbus TCP/IP, Modbus encapsulated in TCP/IP, and Modbus

with Electronic Flow Measurement (EFM) extensions.

Figure 1-1 shows the housing, typical I/O modules, and communication

modules installed in a ROC827. The patented ABS (Acrylonitrile

Butadiene Styrene) plastic housing has wire covers to protect the wiring

terminals. The housing includes DIN rail mounts for mounting the

ROC827 on a panel or in a user-supplied enclosure.

ROC827 Instruction Manual

Issued Mar-06 General Information 1-3

Figure 1-1. ROC827 Base Unit (without Expanded Backplane)

The ROC827’s CPU contains the microprocessor, the firmware, a

connector to the backplane, three built-in communication ports, a Light-

Emitting Diode (LED) low power wakeup button, a RESET button, the

application license key connectors, a STATUS LED indicating system

integrity, diagnostic LEDs for two of the communications ports, and the

main processor.

CPU

LOI (Local Port)

EIA-232 (RS-232D)

Wire Channel Cover

Right End Cap

Power Supply Module

Built-in Ethernet (Comm1)

Built-in EIA-232 (RS-232C)

(Comm2)

I/O Module (1 of 3)

ROC827 Instruction Manual

Issued Mar-06 General Information 1-4

Figure 1-2 shows a typical expanded backplane (EXP) populated with a

full complement of six I/O modules. Each EXP is composed of the same

plastic housing as the ROC827, contains six I/O slots, and has a powered

backplane that easily attaches to the ROC827 and other EXPs.

Figure 1-2. ROC827 with One Expanded Backplane

The ROC827 and EXPs support nine types of Input/Output (I/O) modules,

which can satisfy a wide variety of field I/O requirements (refer to Chapter

4, Input/Output Modules). I/O modules include:

 Analog Inputs (AI).

 Analog Outputs (AO).

 Discrete Inputs (DI).

 Discrete Outputs (DO).

 Digital Relay Outputs (DOR).

 HART Inputs/Outputs.

 Pulse Inputs (PI) – High/Low Speed.

 Resistance Temperature Detector Inputs (RTD).

 J and K Type Thermocouple (T/C) Inputs.

ROC827 Instruction Manual

Issued Mar-06 General Information 1-5

The ROC827 holds up to six communication ports (refer to Chapter 5,

Communications). Three communication ports are built-in:

 Local Operator Interface (LOI) – Local Port EIA-232 (RS-232D).

 Ethernet – Comm1 Port for use with the DS800 Development Suite

Software.

 EIA-232 (RS-232C) – Comm2 Port for point-to-point asynchronous

serial communications.

Communication modules (which install in the ROC827’s Comm3,

Comm4, and Comm5 slots) provide additional ports for communicating

with a host computer or other devices. Modules include:

 EIA-232 (RS-232C) – Point-to-point asynchronous serial

communications include Data Terminal Ready (DTR) support, Ready

To Send (RTS) support, and radio power control.

 EIA-422/EIA-485 (RS-422/RS-485) – Point-to-point (EIA-422) or

multiple-point (EIA-485) asynchronous serial communications.

 Multi-Variable Sensor (MVS) – Interfaces with MVS Sensors (up to

two modules per ROC827).

 Dial-up modem – Communications over a telephone network (14.4K

V.42 bis with throughput up to 57.6K bps).

Hot-Swappable &

Hot-Pluggable Modules—whether I/O or communication—easily install in the

module slots. Modules are both “hot-swappable” (they can be

removed and another module of the same kind installed while the

ROC827 is powered) and “hot-pluggable” (they can be installed

directly into unused module slots with the ROC827 is powered).

Modules are also self-identifying, which means that the ROCLINK

800 Configuration software recognizes the module (although you may

need to configure the module using the software). The modules have

extensive short circuit, overvoltage protection, and are self-resetting

after a fault clears.

1.2.1 Central Processor Unit (CPU)

The CPU contains the microprocessor, the firmware, connectors to the

backplane, the three built-in communication ports (two with LEDs), a

LED low power wakeup button, a RESET button, the application license

key connectors, a STATUS LED indicating system integrity, and the main

processor.

CPU components include:

 32-bit microprocessor based on Motorola MPC862 Quad Integrated

Communications Controller (PowerQUICC™) PowerPC processor.

 SRAM (Static Random Access Memory) with battery backup.

 Flash ROM (Read-Only Memory).

 SDRAM (Synchronous Dynamic Random Access Memory).

ROC827 Instruction Manual

Issued Mar-06 General Information 1-6

 Diagnostic monitoring.

 Real-Time Clock.

 Automatic self-tests.

 Power saving modes.

 Local Operator Interface (LOI) EIA-232 (RS-232D) Local Port.

 EIA-232 (RS-232C) serial Comm2 port.

 Ethernet Comm1 port.

1.2.2 Processor and Memory

The ROC827 uses a 32-bit microprocessor with processor bus clock

frequency at 50 MHz with a watchdog timer. The Motorola MPC862

Quad Integrated Communications Controller (PowerQUICC) PowerPC

processor and the Real-Time Operating System (RTOS) provide both

hardware and software memory protection.

1.2.3 Real-Time Clock (RTC)

You can set the ROC827’s Real-Time Clock (RTC) for year, month, day,

hour, minute, and second. The clock provides time stamping of the

database values. The battery-backed clock firmware tracks the day of the

week, corrects for leap year, and adjusts for daylight savings time (user-

selectable). The time chip automatically switches to backup power when

the ROC827 loses primary input power.

The internal Sanyo 3-volt CR2430 lithium battery provides backup for the

data and the Real-Time Clock when the main power is not connected. The

battery has a one-year minimum backup life with the battery is installed,

the jumper disengaged, and no power applied to the ROC827. The battery

has a ten-year backup life with the backup battery installed and power

applied to the ROC827 or when the battery is removed from the ROC827.

Note: If the Real-Time Clock does not keep the current time when you

remove power, replace the lithium battery.

ROC827 Instruction Manual

Issued Mar-06 General Information 1-7

1.2.4 Diagnostic Monitoring

The ROC827 has diagnostic inputs incorporated into the circuitry for

monitoring system integrity. Use ROCLINK 800 software to access the

System Analog Inputs. Refer to Table 1-1.

Table 1-1. System Analog Inputs

System AI

Point Number Function Normal Range

1 Battery Input Voltage 11.25 to 16 Volts dc

2 Charge in Voltage 0 to 18 Volts dc

3 Module Voltage 11.00 to 14.50 Volts dc

4 Not Used Not Used

5 On Board Temperature –40 to 85C (–40 to

185F)

1.2.5 Options

The ROC827 allows you to choose from a wide variety of options to suit

many applications.

Optional communication modules include EIA-232 (RS-232) serial

communications, EIA-422/485 (RS-422/485) serial communications,

Multi-Variable Sensor (MVS), and dial-up modem communications (refer

to Chapter 5, Communications).

The ROC827 can handle up to two MVS interface modules. Each module

can provide power and communications for up to six MVS sensors, for a

total of up to 12 MVS sensors per ROC827 (refer to Chapter 5,

Communications).

Optional I/O modules include Analog Inputs (AI), Analog Outputs (AO),

Discrete Inputs (DI), Discrete Outputs (DO), Discrete Output Relays

(DOR), Pulse Inputs (PI), Resistance Temperature Detector (RTD) Inputs,

Thermocouple (T/C) Inputs, and Highway Addressable Remote

Transducers (HART) (refer to Chapter 4, Input/Output Modules).

The optional application license keys provide extended functionality, such

as the use of the DS800 Development Suite Software (the IEC 61131-3

compliant programming environment) and various user programs, and

enables embedded meter runs. For example, you need to install a license

key with the proper license in the ROC827 to perform AGA calculations.

Refer to Section 1.6, “DS800 Development Suite Software.”

The Local Operator Interface (LOI local port) communications terminal

requires the installation of an LOI cable between the ROC827 and your

PC. The LOI port uses an RJ-45 connector with a standard EIA-232

(RS-232D) pin out.

ROC827 Instruction Manual

Issued Mar-06 General Information 1-8

1.3 FCC Information

This equipment complies with Part 68 of the FCC rules. Etched on the

modem assembly is, among other information, the FCC certification

number and Ringer Equivalence Number (REN) for this equipment. If

requested, this information must be provided to the telephone company.

This module has an FCC-compliant telephone modular plug. The module

is designed to be connected to the telephone network or premises’ wiring

using a compatible modular jack that is Part 68-compliant.

The REN is used to determine the quantity of devices that may be

connected to the telephone line. Excessive RENs on the telephone line

may result in the devices not ringing in response to an incoming call.

Typically, the sum of the RENs should not exceed five (5.0). Contact the

local telephone company to determine the total number of devices that

may be connected to a line (as determined by the total RENs).

If this equipment and its dial-up modem causes harm to the telephone

network, the telephone company will notify you in advance that temporary

discontinuance of service may be required. However, if advance notice is

not practical, the telephone company will notify the customer as soon as

possible. In addition, you will be advised of your right to file a complaint

with the FCC if you believe it necessary.

The telephone company may make changes to its facilities, equipment,

operations, or procedures that could affect the operation of the equipment.

If this happens, the telephone company will provide advance notice so you

can make the necessary modifications to maintain uninterrupted service.

If you experience trouble with this equipment or the dial-up modem,

contact Emerson Process Management’s Flow Computer Division (at 641-

754-3923) for repair or warranty information. If the equipment harms the

telephone network, the telephone company may request that you

disconnect the equipment until the problem is resolved.

1.4 Firmware

The firmware that resides in Flash Read-Only Memory (ROM) contains

the operating system, ROC Plus communications protocol, and application

software. The CPU module provides battery-backed Static Random

Access Memory (SRAM) for saving configurations, storing events,

alarms, and the historical logs.

The ROC800-Series Operating System firmware provides a complete

operating system for the ROC827. The firmware in the ROC827 is field-

upgradeable using a serial connection or the Local Operator Interface

(LOI) local port. For more information, refer to the ROCLINK 800

Configuration Software User Manual (Form A6121).

The firmware supports:

 Input/Output Database.

ROC827 Instruction Manual

Issued Mar-06 General Information 1-9

 Historical Database.

 Event and Alarm Log Databases.

 Applications (PID, AGA, FST, and such).

 Measurement Station Support.

 Determining Task Execution.

 Real-Time Clock.

 Establishing and Managing Communications.

 Self-Test Capability.

The firmware makes extensive use of configuration parameters, which you

configure using ROCLINK 800 software.

RTOS The ROC800-Series firmware uses a pre-emptive, multi-tasking,

message-based Real-Time Operating System (RTOS) with hardware-

supported memory protection. Tasks are assigned priorities and, at any

given time, the operating system determines which task will run. For

instance, if a lower priority task is executing and a higher priority task

needs to run, the operating system suspends the lower priority task,

allows the higher priority task to run to completion, then resumes the

lower priority task’s execution. This is more efficient than a “time

sliced” architecture type.

TLP The ROC827 reads data from and writes data to data structures called

“points.” A “point” is a ROC Plus Protocol term for a grouping of

individual parameters (such as information about an I/O channel) or

some other function (such as a flow calculation). Points are defined by

a collection of parameters and have a numerical designation that

defines the type of point (for example, point type 101 refers to a

Discrete Input and point type 103 refers to an Analog Input).

The logical number indicates the physical location for the I/O or the

logical instance for non-I/O points within the ROC827. Parameters are

individual pieces of data that relate to the point type. For instance, the raw

A/D value and the low scaling value are parameters associated with the

Analog Input point type, 103. The point type attributes define the database

point to be one of the possible types of points available to the system.

Together, these three components—the type (T), the logical (L), and the

parameters (P)—can be used to identify specific pieces of data that reside

in a ROC827’s data base. Collectively, this three-component address is

often called a “TLP.”

I/O Database The Input/Output database contains the input and output points the

operating system firmware supports, including the System Analog

Inputs, Multi-Variable Sensor (MVS) inputs, and Input/Output (I/O)

modules. The firmware automatically determines the point type and

point number location of each installed I/O module. It then assigns

each input and output to a point in the database and includes user-

defined configuration parameters for assigning values, statuses, or

identifiers. The firmware scans each input, placing the values into the

ROC827 Instruction Manual

Issued Mar-06 General Information 1-10

respective database point. These values are available for display and

historical archiving.

SRBX Spontaneous-Report-by-Exception (SRBX or RBX) communication

allows the ROC827 to monitor for alarm conditions and, upon

detecting an alarm, automatically reports the alarm to a host computer.

Any kind of communications link—dial-up modem or serial line—can

perform SRBX as long as the host is set up to receive field-initiated

calls.

Protocols The firmware supports both the ROC Plus protocol and the Modbus

master and slave protocol. ROC Plus protocol can support serial

communications and radio or telephone modem communications to

local or remote devices, such as a host computer. The firmware also

supports the ROC Plus protocol over TCP/IP on the Ethernet port. The

ROC Plus protocol is similar to the ROC 300/400/500 protocol, since

it used many of the same opcodes. For more information, contact your

local sales representative.

The ROC800-Series firmware also supports Modbus protocol as either

master or slave device using Remote Terminal Unit (RTU) or American

Standard Code for Information Interchange (ASCII) modes. This allows

you to easily integrate the ROC827 into other systems. Extensions to the

Modbus protocol allow the retrieval of history, event, and alarm data in

Electronic Flow Metering (EFM) Measurement applications.

Note: In Ethernet mode, the firmware support Modbus only in slave mode.

Security The ROCLINK 800 software also secures access to the ROC827. You

can define and store a maximum of 16 case-sensitive user identifiers

(User IDs). In order for the ROC827 to communicate, a case sensitive

log-on ID supplied to the ROCLINK 800 software must match one of

the IDs stored in the ROC827.

The operating system firmware supports the application-specific firmware

supplied in the Flash ROM. The application firmware includes

Proportional, Integral, and Derivative (PID) Control; FSTs; Spontaneous-

Report-By-Exception (SRBX) Communications Enhancement; optional

American Gas Association (AGA) Flow calculations with station support;

and optional IEC 61131-3 language programs (using DS800 Development

Suite software). Applications reside, so you do not need to re-build and

download the firmware for changes in calculation method.

Input Module

Addressing The ROC800-Series firmware, by default, supports 16 addressable

points per module slot. However, to accommodate all the ROC827’s

expanded input capabilities (up to 27 module slots), you must set the

firmware to support eight (8) addressable points per module slot.

(Accomplish this using ROCLINK 800 and selecting ROC >

Information. On the Device Information screen’s General tab, click

the 8-Points Per Module radio button in the Logical Compatibility

Mode frame.)

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Issued Mar-06 General Information 1-11

The difference between 16-point and 8-point addressing becomes critical

when you have a host device reading data from specific TLPs. For

example, under 16-point addressing, channel 2 for a DI module in slot 2 is

referenced by TLP 101,33,3. Under 8-point addressing, channel 2 for a DI

module in slot 2 is referenced by TLP 101,17,23. Table 1-2 illustrates the

difference between 8-point and 16-point addressing.

Table 1-2. 16-Point vs. 8-Point Addressing

Slot Number Logicals (16 pt) Logicals (8 pt)

0 0–15 0–7

1 16–31 8–15

2 32–47 16–23

3 48–63 24–31

4 64–79 32–39

5 80–95 40–47

6 96–111 48–55

7 112–127 56–63

8 128–143 64–71

9 144–159 72–79

10 N/A 80–87

11 N/A 88–95

12 N/A 96–103

13 N/A 104–111

14 N/A 112–119

15 N/A 120–127

16 N/A 128–135

17 N/A 136–143

18 N/A 144–151

19 N/A 152–159

20 N/A 160–167

21 N/A 168–175

22 N/A 176–183

23 N/A 184–191

24 N/A 192–199

25 N/A 200–207

26 N/A 208–215

27 N/A 216–223

Note: 16-point addressing is the default for the ROC800-Series firmware.

To maximize the expanded input capabilities of the ROC827, you must

use ROCKLINK 800 to modify the firmware addressing to use 8-points

per module.

1.4.1 Historical Database and Event & Alarm Log

The historical database provides archiving of measured and calculated

values for either on-demand viewing or saving to a file. It provides an

historical record in accordance with API Chapter 21.1. You can configure

each of up to 200 points in the historical database to archive values under

various schemes, such as averaging or accumulating, as appropriate for the

type of database point.

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Issued Mar-06 General Information 1-12

The historical database is maintained in 11 segments. You can configure

each segment in the database to archive selected points at specified time

intervals. The segments can continuously archive or can be turned on and

off.

You can distribute history points among history segments 1 through 10

and the general history segment. For each history segment, you can

configure the number of periodic history values archived, the frequency of

archiving periodic values, the number of daily values archived, and the

contract hour. The number of minute values is fixed at 60. The 200 points

provide a total of over 197,000 entries (equal to more than 35 days of 24-

hour data for 200 points).

The Event Log records the last 450 parameter changes, power on and off

cycles, calibration information, and other system events. The event is

recorded along with a date and time stamp. The Alarm Log records the last

450 configured occurrences of alarms (set and clear). You can view the

logs, save them to a disk file, or print them using ROCLINK 800 software.

1.4.2 Meter Runs and Stations

You can group similarly configured meter runs into stations, which

provide great benefits during configuration and reporting. You can also

configure each meter run, which eliminates redundant meter run data

within a station and enables faster data processing.

You can group meter runs among the maximum of twelve stations in any

combination. Meter runs belong in the same station when they have the

same gas composition data and calculation methods. Stations allow you to:

 Set contract hours differently for each station.

 Designate several individual meter runs as part of a station.

 Configure one to twelve meter runs for each station.

1.4.3 Flow Calculations

Gas and liquid calculation methods include:

 AGA and API Chapter 21 compliant for AGA linear and differential

meter types.

 AGA 3 – Orifice Plates for gas.

 AGA 7 – Turbine Meters (ISO 9951) for gas.

 AGA 8 – Compressibility for Detailed (ISO 12213-2), Gross I (ISO

12213-3), and Gross II for gas.

 ISO 5167 – Orifice Plates for liquid.

 API 12 – Turbine Meters for liquid.

ROC827 firmware completes full calculations every second on all

configured runs (up to 12) for AGA 3, AGA 7, AGA 8, ISO 5167, and

ISO 9951.

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Issued Mar-06 General Information 1-13

AGA 3 calculations conform to the methods described in American Gas

Association Report No. 3, Orifice Metering of Natural Gas and Other

Related Hydrocarbon Fluids. Based on the second and third editions, the

calculation method is 1992 AGA 3.

The AGA 7 calculations conform to methods described in American Gas

Association Report No. 7, Measurement of Gas by Turbine Meters, and

use the AGA 8 method for determining the compressibility factor.

The AGA 8 method calculates the compressibility factor based on the

physical chemistry of the component gasses at specified temperatures and

pressures.

The firmware supports liquid calculation methods ISO 5167 and API 12.

Factors for API 12 correction must be supplied through a Function

Sequence Table (FST) or user program. For more information, refer either

to the Function Sequence Table (FST) User Manual (Form A4625) or the

ROCLINK 800 Configuration Software User Manual (Form A6121).

1.4.4 Automatic Self Tests

The operating system firmware supports diagnostic tests on the ROC827

hardware, such as RAM integrity, Real-Time Clock operation, input

power voltage, board temperature, and watchdog timer.

The ROC827 periodically performs the following self-tests:

 Voltage tests (battery low and battery high) ensure the ROC827 has

enough power to run while not allowing the battery to be overcharged.

The ROC827 operates with 12 Volts dc (nominal) power. The LEDs

become active when input power with the proper polarity and startup

voltage (9.00 to 11.25 Volts dc) is applied to the BAT+ / BAT–

connectors. Refer to Table 1-1.

 The CPU controls the software “watchdog.” This watchdog checks the

software for validity every 2.7 seconds. If necessary, the processor

automatically resets.

 The ROC827 monitors Multi-Variable Sensor(s), if applicable, for

accurate and continuous operation.

 A memory validity self-test is performed to ensure the integrity of

memory.

1.4.5 Low Power Modes

The ROC827 uses low power operation under predetermined conditions

and supports two low power modes, Standby and Sleep.

 Standby

The ROC827 uses this mode during periods of inactivity. When the

operating system cannot find a task to run, the ROC827 enters Standby

mode. This mode keeps all peripherals running and is transparent to

ROC827 Instruction Manual

Issued Mar-06 General Information 1-14

the user. The ROC827 wakes from Standby mode when it needs to

perform a task.

 Sleep

The ROC827 uses this mode if it detects a low battery voltage. The

System AI Battery Point Number 1 measures the battery voltage and

compares it to the LoLo Alarm limit associated with this point. (The

default value for the LoLo Alarm limit is 10.6 Volts dc.) When in

Sleep mode, AUXsw is turned off. For information on configuring

alarms and System AI points, refer to the ROCLINK 800

Configuration Software User Manual (Form A6121).

Note: Sleep mode applies only to ROC827s using the 12 V dc Power

Input module (PM-12).

1.4.6 Proportional, Integral, and Derivative (PID)

The PID Control applications firmware provides Proportional, Integral,

and Derivative (PID) gain control for the ROC827 and enables the stable

operation of 16 PID loops that employ a regulating device, such as a

control valve.

The firmware sets up an independent PID algorithm (loop) in the

ROC827. The PID loop has its own user-defined input, output, and

override capability.

The typical use for PID control is to maintain a Process Variable at a

setpoint. If you configure PID override control, the primary loop is

normally in control of the regulating device. When the change in output

for the primary loop becomes less or greater (user-definable) than the

change in output calculated for the secondary (override) loop, the override

loop takes control of the regulating device. When the switchover

conditions are no longer met, the primary loop regains control of the

device. Parameters are also available to force the PID into either loop or

force it to stay in one loop.

1.4.7 Function Sequence Table (FST)

The Function Sequence Table (FST) applications firmware gives analog

and discrete sequencing control capability to the ROC827. This

programmable control is implemented in an FST, which defines the

actions the ROC827 performs using a series of functions. To develop

FSTs, you use the FST Editor in the ROCLINK 800 Configuration

software.

The function is the basic building block of an FST. You organize

functions in a sequence of steps to form a control algorithm. Each function

step can consist of a label, a command, and associated arguments. Use

labels to identify functions and allow branching to specific steps within an

FST. You select commands from a library of mathematical, logical, and

other command options. Command names consist of up to three characters

ROC827 Instruction Manual

Issued Mar-06 General Information 1-15

or symbols. Finally, arguments provide access to process I/O points and

retrieve real-time values. A function may have zero, one, or two

arguments.

The FST Editor provides a workspace into which you can enter—for each

FST—either a maximum of 500 lines or a maximum of 3000 bytes. Since

the total amount of memory each FST uses is based on the number of steps

and the commands used in each step and since different commands

consume different amounts of memory, estimating the memory usage of

an FST is difficult. Only after compiling an individual FST can you

conclusively know its memory usage.

For further information on FSTs, refer to the ROCLINK 800 Configuration

Software User Manual (Form A6121) or the Function Sequence Table

(FST) User Manual (Form A4625).

1.5 ROCLINK 800 Configuration Software

ROCLINK 800 Configuration software (“ROCLINK 800”) is a

Microsoft® Windows-based program that runs on a personal computer

and enables you to monitor, configure, and calibrate the ROC827.

ROCLINK 800 has a standard, easy-to-use Windows interface. Tree-based

navigation makes accessing features quick and easy.

Many of the configuration screens, such as stations, meters, I/O, and PIDs,

are available while ROCLINK 800 is off-line. This enables you to

configure the system while either on-line or off-line with the ROC827.

The Local Operator Interface (LOI local port) provides a direct link

between the ROC827 unit and a personal computer (PC). The LOI port

uses an RJ-45 connector with standard EIA-232 (RS-232D) pinout. With a

personal computer running ROCLINK 800, you can locally configure the

ROC827, extract data, and monitor its operation.

Remote configuration is possible from a host computer using a serial or

dial-up modem communications line. Configurations can be duplicated

and saved to a disk. In addition to creating a backup, this feature is useful

when you are similarly configuring multiple ROC827s for the first time, or

when you need to make configuration changes off-line. Once you create a

backup configuration file, you can load it into a ROC827 by using the

Download function.

Access to the ROC827 is restricted to authorized users with correct User

ID and password.

You can build custom displays for the ROC827 that combine both graphic

and dynamic data elements. The displays can monitor the operation of the

ROC827 either locally or remotely.

You can archive historical values for any numeric parameter in the

ROC827. For each parameter configured for historical archiving, the

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Issued Mar-06 General Information 1-16

system keeps time-stamped minute, periodic, and daily data values as well

as yesterday’s and today’s daily minimum and maximum values.

You can collect history values from the ROC827 using ROCLINK 800 or

another third-party host system. You can view history directly from the

ROC827 or from a previously saved disk file. For each history segment,

you can configure the number of periodic history values archived, the

frequency of archiving the periodic values, the number of daily values

archived, and the contract hour.

ROCLINK 800 can create an EFM (Electronic Flow Measurement) report

file that contains all the configuration, alarms, events, periodic and daily

history logs, and other history logs associated with the stations and meter

runs in the ROC827. This file then becomes the custody transfer audit

trail.

The SRBX (Spontaneous-Report-By-Exception) alarming feature is

available for the host communication ports (Local and dial-up modem

ports). SRBX allows the ROC827 to contact the host to report an alarm

condition.

Use ROCLINK 800 to:

 Configure and view Input/Output (I/O) points, flow calculations, meter

runs, PID control loops, system parameters, and power management

features.

 Retrieve, save, and report historical data.

 Retrieve, save, and report events and alarms.

 Perform five-point calibration on Analog Inputs and Multi-Variable

Sensor Inputs.

 Perform three-point calibration on RTD Inputs.

 Implement user security.

 Create, save, and edit graphical displays.

 Create, save, edit, and debug Function Sequence Tables (FSTs) of up

to 500 lines each.

 Set up communication parameters for direct connection, telephone

modems, and other communications methods.

 Configure Modbus parameters.

 Set up radio power control.

 Update the firmware.

1.6 DS800 Development Suite Software

DS800 Development Suite software allows you to program in any one of

the five IEC 61131-3 languages. You can download DS800 applications to

a ROC827 over the Ethernet port, independently of the ROCLINK 800

software.

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Issued Mar-06 General Information 1-17

DS800 Development Suite software allows programming in all five of the

IEC 61131-3 languages:

 Ladder Logic Diagrams (LD).

 Sequential Function Chart (SFC).

 Function Block Diagram (FBD).

 Structured Text (ST).

 Instruction List (IL).

A Flow Chart language provides a sixth programming language. With

these six languages, FSTs, and built-in functionality, you can configure

and program the ROC827 in an environment in which you are

comfortable.

You can download and implement programs developed in the DS800

Development Suite software in the ROC827 in addition to—or as an

alternative to—FST programs. DS800 software has definite benefits for

programmers who prefer to use the IEC 61131-3 languages, who desire to

multi-drop units in a distributed architecture, or who desire enhanced

program diagnostics capabilities.

Additional DS800 Development Suite software features include:

 Cross-reference (bindings) between variables in separate ROC827

units.

 Variable Dictionary.

 Off-line simulation for diagnostics and testing.

 On-line modification of programs.

 On-line debugging of programs.

 Locking and forcing of variables.

 User developed functions and function blocks.

 User defined templates.

 Creation and support of user defined libraries.

1.7 Expanded Backplane

The expanded backplane is a key component to the ability of the ROC827

to expand its I/O capabilities to meet your needs. The ROC827 base unit

can accommodate up to four additional expanded backplanes, which easily

snap together. This increases the total number of available I/O slots to 27.

Refer to Chapter 2, Installation and Use, for instructions on adding

backplanes to the ROC827 base unit. Refer to Chapter 3, Power

Connections, to assess the power requirements for any particular I/O

configuration.

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Issued Mar-06 General Information 1-18

1.8 Related Specification Sheets

For technical details on the ROC827 and the ROC800-Series expanded

backplane, refer to the specification sheet 6:ROC827. The most current

version of this specification sheet is available at

www.EmersonProcess.com/flow.

Note: Since the expanded backplanes accommodate the same I/O modules

as the ROC827 base unit, the firmware specifications for the expanded

backplane are identical to those for the ROC827. However, because of the

opportunity for different configurations, power requirements differ. Refer

to Chapter 3, Power Connections, for specific information.

ROC827 Instruction Manual

Issued Mar-06 Installation and Use 2-1

Chapter 2 – Installation and Use

This chapter describes the ROC827 housing (case), its backplane

(electronic connection board at the back of the housing), the ROC800-

Series CPU (central processing unit), and the ROC800-Series Expanded

Backplane (EXP). This chapter provides a description and specifications

of these hardware items and explains installation and startup of the

ROC827.

In This Chapter

2.1 Installation Requirements ........................................................................2-1

2.1.1 Environmental Requirements ........................................................2-2

2.1.2 Site Requirements .........................................................................2-2

2.1.3 Compliance with Hazardous Area Standards................................2-3

2.1.4 Power Installation Requirements ...................................................2-4

2.1.5 Grounding Installation Requirements ............................................2-4

2.1.6 I/O Wiring Requirements................................................................2-5

2.2 Required Tools ........................................................................................2-5

2.3 Housing....................................................................................................2-5

2.3.1 Removing and Replacing End Caps..............................................2-6

2.3.2 Removing and Installing Wire Channel Covers .............................2-6

2.3.3 Removing and Installing Module Covers .......................................2-7

2.4 Mounting the ROC827 on a DIN Rail ......................................................2-7

2.4.1 Installing the DIN Rail ....................................................................2-9

2.4.2 Securing the ROC827 on the DIN Rail ..........................................2-9

2.4.3 Removing the ROC827 from the DIN Rail...................................2-10

2.5 ROC800-Series Expanded Backplane (EXP)........................................2-10

2.5.1 Attaching an Expandable Backplane...........................................2-11

2.5.2 Removing an Expandable Backplane..........................................2-12

2.6 Central Processor Unit (CPU) ...............................................................2-13

2.6.1 Removing the CPU Module .........................................................2-16

2.6.2 Installing the CPU Module ...........................................................2-16

2.7 License Keys .........................................................................................2-17

2.7.1 Installing a License Key ...............................................................2-18

2.7.2 Removing a License Key .............................................................2-19

2.8 Startup and Operation ...........................................................................2-19

2.8.1 Startup..........................................................................................2-20

2.8.2 Operation .....................................................................................2-20

2.1 Installation Requirements

The ROC827’s design makes it highly adaptable to a wide variety of

installations. Consequently, this manual cannot cover all possible

installation scenarios. Contact your local sales representative if you

require information concerning a specific installation not described in this

manual.

Planning is essential to a good installation. Because installation

requirements depend on many factors (such as the application, location,

ROC827 Instruction Manual

Issued Mar-06 Installation and Use 2-2

ground conditions, climate, and accessibility), this document only

provides generalized guidelines.

2.1.1 Environmental Requirements

Always install the ROC827 in a user-supplied enclosure, as the ROC827

requires protection from direct exposure to rain, snow, ice, blowing dust or

debris, and corrosive atmospheres. If you install the ROC827 outside a

building, it must be placed in a National Electrical Manufacturer’s

Association (NEMA) 3 or higher rated enclosure to ensure the necessary

level of protection.

Note: In salt spray environments, it is especially important to ensure that

the enclosure—including all entry and exit points—is sealed properly.

The ROC827 operates over a wide range of temperatures. However, in

extreme climates it may be necessary to provide temperature-controlling

devices to maintain stable operating conditions. In extremely hot climates,

a filtered ventilation system or air conditioning may be required. In

extremely cold climates, it may be necessary to provide a thermostatically

controlled heater in the same enclosure as the ROC827. To maintain a

non-condensing atmosphere inside the ROC827 enclosure in areas of high

humidity, it may be necessary to add heat or dehumidification.

2.1.2 Site Requirements

When locating the ROC827 on the site, careful consideration can help

reduce future operational problems. Consider the following items when

choosing a location:

 Local, state, and federal codes often place restrictions on locations and

dictate site requirements. Examples of these restrictions are fall

distance from a meter run, distance from pipe flanges, and hazardous

area classifications. Ensure that all code requirements are met.

 Choose a location for the ROC827 to minimize the length of signal

and power wiring.

 Locate ROC827s equipped for radio communications so the antenna

has an unobstructed signal path. Antennas should not be aimed into

storage tanks, buildings, or other tall structures. If possible, antennas

should be located at the highest point on the site. Overhead clearance

should be sufficient to allow the antenna to be raised to a height of at

least twenty feet.

 To minimize interference with radio communications, choose a

location for the ROC827 away from electrical noise sources, such as

engines, large electric motors, and utility line transformers.

ROC827 Instruction Manual

Issued Mar-06 Installation and Use 2-3

 Choose a location for the ROC827 away from heavy traffic areas to

reduce the risk of being damaged by vehicles. However, provide

adequate vehicle access to aid monitoring and maintenance.

 The site must comply with class limits of Part 15 of the FCC rules.

Operation is subject to the following two conditions: (1) The device

may not cause harmful interference, and (2) the device must accept

any interference received, including interference that may cause

undesired operation.

2.1.3 Compliance with Hazardous Area Standards

The ROC hazardous location approval is for Class I, Division 2, Groups

A, B, C, and D. The Class, Division, and Group terms include:

 Class defines the general nature of the hazardous material in the

surrounding atmosphere. Class I is for locations where flammable

gases or vapors may be present in the air in quantities sufficient to

produce explosive or ignitable mixtures.

 Division defines the probability of hazardous material being present in

an ignitable concentration in the surrounding atmosphere. Division 2

locations are locations that are presumed to be hazardous only in an

abnormal situation.

 Group defines the hazardous material in the surrounding atmosphere.

Groups A to D are:

o Group A: Atmosphere containing acetylene.

o Group B: Atmosphere containing hydrogen, gases, or vapors of

equivalent nature.

o Group C: Atmosphere containing ethylene, gases, or vapors of

equivalent nature.

o Group D: Atmosphere containing propane, gases, or vapors of

equivalent nature.

For the ROC827 to be approved for hazardous locations, it must be

installed in accordance with the National Electrical Code (NEC)

guidelines or other applicable codes.

Caution When working on units located in a hazardous area (where explosive

gases may be present), make sure the area is in a non-hazardous state

before performing procedures. Performing these procedures in a

hazardous area could result in personal injury or property damage.

ROC827 Instruction Manual

Issued Mar-06 Installation and Use 2-4

2.1.4 Power Installation Requirements

Be sure to route power away from hazardous areas, as well as sensitive

monitoring and radio equipment. Local and company codes generally

provide guidelines for installations. Adhere rigorously to all local and

National Electrical Code (NEC) requirements.

The removable terminal blocks accept 12 American Wire Gauge (AWG)

or smaller wiring.

Although the ROC827 can operate on different DC voltages based on the

installed Power Input module, it is good practice when using a battery-

backed system to install a low-voltage cutoff device to help protect

batteries and other devices the ROC827 does not power. Similarly, when

the ROC827 uses a PM-24 Power Input module with a 24 V dc battery-

backed system, it is a good practice to install an appropriate low voltage

cutoff device to protect the battery back-up.

2.1.5 Grounding Installation Requirements

If your company has no specific grounding requirements, install the

ROC827 as a floating system (unconnected to ground). Otherwise, follow

your company’s specific grounding practices. However, if you are making

a connection between a grounded device and the ROC827 EIA-232 (RS-

232) port, ground the ROC827 Power Input module either by connecting

the PM-12’s BAT– to ground or by connecting either of the PM-24’s

negative Power Inputs to ground.

The National Electrical Code (NEC) governs the ground wiring

requirements. When the equipment uses a DC voltage source, the

grounding system must terminate at the service disconnect. All equipment

grounding conductors must provide an uninterrupted electrical path to the

service disconnect. This includes wire or conduit carrying the power

supply conductors.

 The National Electrical Code Article 250-83 (1993), paragraph c,

defines the material and installation requirements for grounding

electrodes.

 The National Electrical Code Article 250-91 (1993), paragraph a,

defines the material requirements for grounding electrode conductors.

 The National Electrical Code Article 250-92 (1993), paragraph a,

provides installation requirements for grounding electrode conductors.

 The National Electrical Code Article 250-95 (1993) defines the size

requirements for equipment grounding conductors.

Improper grounding or poor grounding practice can often cause problems,

such as the introduction of ground loops into your system. Proper

grounding of the ROC827 helps to reduce the effects of electrical noise on

the ROC827’s operation and protects against lightning.

ROC827 Instruction Manual

Issued Mar-06 Installation and Use 2-5

Install a surge protection device at the service disconnect on DC voltage

source systems to protect against lightning and power surges for the

installed equipment. All earth grounds must have an earth to ground rod or

grid impedance of 25 ohms or less as measured with a ground system

tester. You may also consider a telephone surge protector for the dial-up

modem communications module.

A pipeline with cathodic protection is not a good ground. Do not tie

common to the cathodic part of the pipeline.

When connecting shielded cable, be sure to tie the shielded cable to earth

ground at the end of the cable attached to the ROC827 only. Leave the

other end of the shielded cable open to avoid ground loops.

2.1.6 I/O Wiring Requirements

I/O wiring requirements are site- and application-dependent. Local, state,

and NEC requirements determine the I/O wiring installation methods.

Direct buried cable, conduit and cable, or overhead cable are all options

for I/O wiring installations.

Shielded, twisted-pair cable is recommended for I/O signal wiring. The

twisted-pair minimizes signal errors caused by Electro-Magnetic

Interference (EMI), Radio Frequency Interference (RFI), and transients.

Use insulated, shielded, twisted-pair wiring when using MVS signal lines.

The removable terminal blocks accept 12 AWG or smaller wire.

2.2 Required Tools

Use the following tools to perform installation and maintenance

procedures on the ROC827. For tools required for installation or

maintenance of accessories, refer to the ROC/FloBoss Accessories

Instruction Manual (Form A4637).

 Philips screwdriver, size 0.

 Flat blade screwdriver, size 2.5 mm (0.1 inch).

 Flat blade screwdriver, large, or other prying instrument.

2.3 Housing

The housing case is made of a patented Acrylonitrile Butadiene Styrene

(ABS) plastic (U.S. Patent 6,771,513) and the wire channel covers are

made of polypropylene plastic.

ROC827 Instruction Manual

Issued Mar-06 Installation and Use 2-6

2.3.1 Removing and Replacing End Caps

Normal use and maintenance of the ROC827 does not typically require

you to remove the end caps on the housing. Follow these procedures in

case removal is necessary.

To remove the end caps:

1. Place the tip of a flat-blade screwdriver into the top pry hole of the end

cap and loosen the end cap by pulling the handle of the screwdriver

away from the backplane.

Note: The pry holes are located on the sides of the end caps.

2. Place the tip of a flat-blade screwdriver into the bottom pry hole of the

end cap and loosen the end cap by pulling the handle of the

screwdriver away from the backplane.

3. Pivot the front end cap away from the back edge of the housing.

To replace the end caps:

1. Align the back edge of the end cap on the housing.

2. Rotate the end cap towards the housing and snap the end cap into

place.

2.3.2 Removing and Installing Wire Channel Covers

Install the wire channel covers over the wiring channels once the wiring of

the terminal blocks is complete. Wire channel covers are located on the

front of the ROC827 housing.

To remove a wire channel cover:

1. Grasp the wire channel cover at both the top and bottom.

2. Start at the top or bottom and pull the wire channel cover out of the

wire channel.

To replace a wire channel cover:

1. Align the wire channel cover over the wire channel, allowing

unobstructed wire access.

2. Press the wire channel cover into place until it snaps.

Note: The tabs on the left side of the wire channel cover should rest in the

slots on the left edge of the channel.

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Issued Mar-06 Installation and Use 2-7

2.3.3 Removing and Installing Module Covers

Before you insert an I/O or communications module, remove the module

cover over the empty module slots in which you intend to install the

modules. Although you are not required to remove the power to the

ROC827 to perform this procedure, caution is always advisable when

working with a powered ROC827.

Caution To avoid circuit damage when working inside the unit, use appropriate

electrostatic discharge precautions (such as wearing a grounded wrist

strap).

When working on units located in a hazardous area (where explosive

gases may be present), make sure the area is in a non-hazardous state

before performing procedures. Performing these procedures in a

hazardous area could result in personal injury or property damage.

To remove a module cover:

1. Remove the wire channel cover.

2. Unscrew the two captive screws on the face of the cover.

3. Using the tab at the left side of the removable terminal block, pull the

module cover straight out from the ROC827 housing.

Note: If you remove a module for an extended period, install a module

cover plate over the empty module slot to keep dust and other matter from

getting into the ROC827.

To install a module cover:

1. Place the module cover over the module slot.

2. Screw the two captive screws on the module cover plate.

3. Replace the wire channel cover.

2.4 Mounting the ROC827 on a DIN Rail

When choosing an installation site, be sure to check all clearances.

Provide adequate clearance for wiring and service. The ROC827 mounts

on Type 35 DIN rails and requires two strips of DIN rail. Refer to Figures

2-1, 2-2, and 2-3.

Note: English measurement units (inches) appear in brackets in the

following figures.

ROC827 Instruction Manual

Issued Mar-06 Installation and Use 2-8

Figure 2-1. Side View of the ROC827

Figure 2-2. Bottom View of the ROC827

Note: The distance from the mounting panel to the front of the ROC827 is

174mm (6.85”). If you mount the ROC827 inside an enclosure and want to

connect a cable to the LOI or Ethernet port, ensure adequate clearance for

the cable and the enclosure door. For example, a molded RJ-45 CAT 5

cable can increase the clearance requirement for the enclosure by 25mm

(1”).

ROC827 Instruction Manual

Issued Mar-06 Installation and Use 2-9

Figure 2-3. Back View of the ROC827

2.4.1 Installing the DIN Rail

To install the ROC827 using the 35 x 7.5 mm DIN rails:

1. Mount the lower DIN rail onto the enclosure panel.

2. Snap the upper DIN rail into the ROC827 upper DIN rail mounting

blocks.

3. Place the ROC827 onto the lower rail that is mounted to the plane and

ensure that the ROC827 (with the second strip of DIN rail still in its

upper mounting blocks) is seated against the panel.

4. Fasten the upper strip of DIN rail to the panel.

Note: Following this procedure (which uses the ROC827 to provide the

correct DIN rail spacing) ensures that the ROC827 is held securely in

place.

2.4.2 Securing the ROC827 on the DIN Rail

When placed correctly, the DIN rail catches (see Figure 2-3) secure the

ROC to the DIN rail. Place the catches according to the following

configuration:

 ROC827: One catch.

DIN Rail Mount

DIN Rail Catch

ROC827 Instruction Manual

Issued Mar-06 Installation and Use 2-10

 ROC827 and one EXP: Place catches on ROC827 and EXP.

 ROC827 and two EXPs: Place catches on ROC827 and second EXP.

 ROC827 and three EXPs: Place catches on ROC827 and third EXP.

 ROC827 and four EXPs: Place catches on ROC827 and second and

fourth EXP.

2.4.3 Removing the ROC827 from the DIN Rail

To remove the ROC827 from DIN rails, gently lever the DIN rail catches

(located on the top of the housing) up approximately 3-4mm (1/8”). Then

tilt the top of the ROC827 away from the DIN rail.

2.5 ROC800-Series Expanded Backplane (EXP)

The expanded backplane has connectors for the central processing unit

(CPU), the power input module, and all the I/O and communication

modules. Once a module is completely inserted into the module slot, the

connector on the module fits into one of the connectors on the backplane.

The backplane does not require any wiring, so no jumpers are associated

with the backplane.

Figure 2-4. ROC827 and Expanded Backplane

ROC827 Instruction Manual

Issued Mar-06 Installation and Use 2-11

Removing the backplane from the housing is not recommended, as there

are no field serviceable parts. If the backplane requires maintenance,

please contact your local sales representative.

2.5.1 Attaching an Expandable Backplane

To attach an EXP to an existing ROC827 base unit or to another EXP:

1. Remove the right-hand end cap from the ROC827 as described in

Section 2.3.1, “Removing and Replacing End Caps.”

Note: The EXP may not have attached end caps. If it does, remove the

left-hand end cap.

2. Remove the wire channel covers from the ROC827 as described in

Section 2.3.2, “Removing and Installing Wire Channel Covers.”

3. Align and gently press together the front right edge of the EXP against

the front left edge of the ROC827. This aligns the power connector on

the EXP’s backplane with the socket on the ROC827’s backplane (see

Figure 2-5).

Figure 2-5. Power connector on the EXP Backplane

4. Pivot the back edges of the ROC827 and the EXP toward each other

until they click together.

Note: The plastic locking clips at the back of the EXP click when the

two units securely fasten together.

5. Attach an end cap to the right side of the EXP (if it does not have one).

Do not replace the wire channel covers until you finish installing and

wiring the modules in the EXP.

Note: Adding an EXP–and the modules it will hold–may require you to

adjust your ROC827’s power consumption requirements. Refer to Section

3.2, “Determining Power Consumption.”

ROC827 Instruction Manual

Issued Mar-06 Installation and Use 2-12

2.5.2 Removing an Expandable Backplane

Note: Before you remove an EXP, you must power down the ROC827,

disconnect all wiring from all modules, and remove the entire unit from

the DIN rail. Once the entire ROC827 is free of the DIN rail, you can

detach an individual EXP.

To remove an EXP from an existing ROC827 base unit:

1. Remove the right-hand end cap from the EXP as described in Section

2.3.1, “Removing and Replacing End Caps.”

2. Remove the wire channel covers on either side of the EXP you want to

detach, as described in Section 2.3.2, “Removing and Installing Wire

Channel Covers.”

3. Turn the ROC827 around so that the back of the unit faces you (as

shown in Figure 2-6).

Note: It may be useful to place the ROC827 face-down on a flat

surface with the EXP you want to detach hanging free of the surface’s

edge.

Figure 2-6. Plastic Snaps on the Back of the EXP

Locking clips and

tabs

ROC827 Instruction Manual

Issued Mar-06 Installation and Use 2-13

4. Using a flat-bladed screwdriver, gently pry the plastic locking clips at

the upper and lower back edge of the EXP housing away from their

securing tabs.

Note: Applying too much pressure breaks the plastic hooks.

5. Once you free the plastic locking clips from their securing tabs, gently

pivot the back of the EXP away from the ROC827.

Note: The EXP detaches quickly. Hold it securely to prevent it from

falling.

6. Place the detached EXP in a secure location.

7. Replace the right-hand end cap.

8. Replace the ROC827 on the DIN rail.

9. Reattach all wiring.

10. Replace the wire channel covers.

2.6 Central Processor Unit (CPU)

The ROC827 uses a standard ROC800-Series central processing unit

(CPU) containing the microprocessor, the firmware, connectors to the

backplane, the three built-in communication ports (two with LEDs), a

LED low power wakeup button, a RESET button, the application License

Key connectors, a STATUS LED indicating system integrity, and the main

processor (refer to Figures 2-5 and 2-6 and Tables 2-1 and 2-2).

The 32-bit microprocessor is based on a Motorola MPC862 Quad

Integrated Communications Controller (PowerQUICC) PowerPC

processor running at 50 MHz.

The internal Sanyo 3-volt CR2430 lithium backup battery provides backup

of the data and the Real-Time Clock when the main power is not

connected.

ROC827 Instruction Manual

Issued Mar-06 Installation and Use 2-14

Figure 2-6. CPU Front View

Figure 2-7. CPU Connectors

LED Button

RESET Button

LOI – EIA-232 (RS-232D)x

STATUS LED

LICENSE KEYS x

ETHERNET

EIA-232 (RS-232C)

Battery

LED Button

License Key (at P4)

RESET Button

Boot ROM

License Key (at P6)

Securing Screw

ROC827 Instruction Manual

Issued Mar-06 Installation and Use 2-15

Table 2-1. CPU Connector Locations

CPU Number Definitions

J4 Not Used

P2 LOI Port RJ-45

P3 Ethernet RJ-45

P4 License Key Terminal

P6 License Key Terminal

SW1 LED Button

SW2 RESET Button

The CPU contains a microprocessor supervisory circuit. This device

monitors the battery voltage, resets the processor, and disables the SRAM

chip if the voltage goes out of tolerance. The CPU has an internal Analog

to Digital Converter (A/D). The A/D monitors the supply voltage and

board temperature (refer to “Automatic Self-Tests” in Chapter 1, General

Information).

The CPU has two buttons, LED and RESET (see Figures 2-6 or 2-7):

 RESET: Use this button to reset the ROC827 to system defaults (refer

to “Preserving Configuration and Log Data” in Chapter 6,

Troubleshooting).

Note: First, remove power from the ROC827. Then press and hold in

the RESET button while you re-apply power to the ROC827. Finally,

release the RESET button.

 LED: Press to turn on the LEDs on the CPU module, I/O modules,

and communication modules when the ROC827 has timed out.

The STATUS LED helps to indicate the integrity of the ROC827 (refer to

Table 2-2).

Table 2-2. STATUS LED Functions

Status LED Color Definitions Solution

Continually

Lit Green  ROC827 functioning normally.  N/A

 Low Battery Voltage alert.  Charge battery.

Continually

Lit Red  System AI (Point number 1) LoLo

Alarm.  Apply DC voltage source.

Flashing Green  Firmware invalid.  Update firmware.

Flashing Green-Green

to Red-Red

 Firmware update in

decompression.  Do not restart the ROC827.

Flashing Green to Red  Firmware update is flashing image.  Do not restart the ROC827.

To save power, you can enable or disable the LEDs on the ROC827 (with

the exception of the LED on the power module). Using the ROCLINK 800

software, you can define how long the LEDs remains on after you press

the LED button on the CPU module. For instance, with the default setting

of five minutes, all LEDs turn off after five minutes. If you press the LED

ROC827 Instruction Manual

Issued Mar-06 Installation and Use 2-16

button, LEDs light and stay lit again for five minutes. By entering a 0

(zero) setting, the LED always stays lit.

2.6.1 Removing the CPU Module

To remove the CPU module:

Caution Failure to exercise proper electrostatic discharge precautions (such as

wearing a grounded wrist strap) may reset the processor or damage

electronic components, resulting in interrupted operations.

When working on units located in a hazardous area (where explosive

gases may be present), make sure the area is in a non-hazardous state

before performing procedures. Performing these procedures in a

hazardous area could result in personal injury or property damage.

1. Perform the backup procedure described in “Preserving Configuration

and Log Data” in Chapter 6, Troubleshooting.

2. Remove power from the ROC827.

3. Remove the wire channel cover.

4. Unscrew the two small screws on the front of the CPU module and

remove the faceplate.

5. Place a small screwdriver under the ejector clip at the top or bottom of

the CPU module and lightly pry the CPU module out of its socket.

You may find it easiest to carefully pry on the top ejector clip a little,

then carefully pry the bottom ejector (refer toFigure2-5). You will feel

and hear the CPU as it detaches from the backplane.

6. Remove the CPU module carefully. Do not scrape either side of the

module against the ROC827. Make sure not to pull on any cables

attached to the CPU module.

2.6.2 Installing the CPU Module

To install the CPU module:

Caution Failure to exercise proper electrostatic discharge precautions (such as

wearing a grounded wrist strap) may reset the processor or damage

electronic components, resulting in interrupted operations.

When working on units located in a hazardous area (where explosive

gases may be present), make sure the area is in a non-hazardous state

before performing procedures. Performing these procedures in a

hazardous area could result in personal injury or property damage.

1. Slide the CPU module into the slot.

2. Press the CPU firmly into the slot, ensuring the ejector clips rest on the

module rail guides. The connectors at the back of the CPU module fit

securely into the connectors on the backplane.

3. Place the CPU faceplate on the CPU.

ROC827 Instruction Manual

Issued Mar-06 Installation and Use 2-17

4. Tighten the two screws on the faceplate of the CPU module firmly (see

Figure 2-5).

5. Replace the wire channel cover.

6. Review “Restarting the ROC827” in Chapter 6, Troubleshooting.

7. Return power to the ROC827 unit.

2.7 License Keys

License keys with valid license codes grant access to applications or, in

some cases, allow optional firmware functionality to execute. In some

situations, a license key may also be required before you can run the

application. Examples of licensed applications include DS800

Development Suite software, meter run calculations, and various user

programs. You can then configure these applications using ROCLINK 800

or the DS800 Development Suite software.

The term “license key” refers to the physical piece of hardware (refer to

Figure 2-6) that can contain up to seven different licenses. Each ROC827

can have none, one, or two installed license keys. If you remove a license

key after enabling an application, the firmware disables the task from

running. This prevents unauthorized execution of protected applications in

a ROC827.

Figure 2-8. License Key

ROC827 Instruction Manual

Issued Mar-06 Installation and Use 2-18

2.7.1 Installing a License Key

To install a license key:

Caution Failure to exercise proper electrostatic discharge precautions (such as

wearing a grounded wrist strap) may reset the processor or damage

electronic components, resulting in interrupted operations.

When working on units located in a hazardous area (where explosive

gases may be present), make sure the area is in a non-hazardous state

before performing procedures. Performing these procedures in a

hazardous area could result in personal injury or property damage.

1. Perform the backup procedure described in “Preserving Configuration

and Log Data” in Chapter 6, Troubleshooting.

2. Remove power from the ROC827.

3. Remove the wire channel cover.

4. Unscrew the screws from the CPU faceplate.

5. Remove the CPU faceplate.

6. Place the license key in the appropriate terminal slot (P4 or P6) in the

CPU (refer to Figure 2-7).

Figure 2-9. License Key Installation

Note: If you are installing a single license key, place it in slot P4.

7. Press the license key into the terminal until it is firmly seated. Refer to

Figure 2-8.

8. Replace the CPU faceplate.

9. Replace the screws on the CPU faceplate.

10. Replace the wire channel cover.

11. Review “Restarting the ROC827” in Chapter 6, Troubleshooting.

12. Restore power to the ROC827.

Incorrect Correct

ROC827 Instruction Manual

Issued Mar-06 Installation and Use 2-19

2.7.2 Removing a License Key

To remove a license key:

Caution Failure to exercise proper electrostatic discharge precautions (such as

wearing a grounded wrist strap) may reset the processor or damage

electronic components, resulting in interrupted operations.

When working on units located in a hazardous area (where explosive

gases may be present), make sure the area is in a non-hazardous state

before performing procedures. Performing these procedures in a

hazardous area could result in personal injury or property damage.

1. Perform the backup procedure described in “Preserving Configuration

and Log Data” in Chapter 6, Troubleshooting.

2. Remove power from the ROC827.

3. Remove the wire channel cover.

4. Unscrew the screws from the CPU faceplate.

5. Remove the CPU faceplate.

6. Remove the license key from the appropriate terminal slot (P4 or P6)

in the CPU (refer to Figure 2-7).

7. Replace the CPU faceplate.

8. Replace the screws from the CPU faceplate.

9. Replace the wire channel cover.

10. Review “Restarting the ROC827” in Chapter 6, Troubleshooting.

11. Restore power to the ROC827.

2.8 Startup and Operation

Before starting the ROC827, perform the following checks to ensure the

unit components are properly installed.

 Make sure the power input module is properly seated in the backplane.

 Make sure I/O and communication modules are seated in the

backplane.

 Check the field wiring for proper installation.

 Make sure the input power has the correct polarity.

 Make sure the input power is fused at the power source.

ROC827 Instruction Manual

Issued Mar-06 Installation and Use 2-20

Caution Check the input power polarity before connecting power to the ROC827.

Incorrect polarity can damage the ROC827.

When working on units located in a hazardous area (where explosive

gases may be present), make sure the area is in a non-hazardous state

before performing procedures. Performing these procedures in a

hazardous area could result in personal injury or property damage.

2.8.1 Startup

Before you apply power to the ROC827, assess the power requirements

(including the base unit, EXPs, and any installed modules and peripheral

devices) that comprise the total configuration for your ROC827. Refer to

“Determining Power Consumption” in Chapter 3, Power Connections.

Apply power to the ROC827 (refer to “Installing a Power Input Module”

in Chapter 3, Power Connections). The power input BAT+ LED indicator

should light green to indicate that the applied voltage is correct. Then, the

STATUS indicator on the CPU should light to indicate a valid operation.

Depending on the Power Saving Mode setting, the STATUS indicator may

not remain lit during operation (refer to Table 2-2).

2.8.2 Operation

Once startup is successful, configure the ROC827 to meet the

requirements of the application. Once it is configured and you have

calibrated the I/O and any associated Multi-Variable Sensors (MVS,

MVSS, MVSI, and so on), place the ROC827 into operation.

Caution When working on units located in a hazardous area (where explosive

gases may be present), make sure the area is in a non-hazardous state

before performing procedures. Performing these procedures in a

hazardous area could result in personal injury or property damage.

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-1

Chapter 3 – Power Connections

This chapter discusses the Power Input modules. It describes the modules,

explains how to install and wire them, and provides worksheets to help

you determine—and tune—the power requirements for the I/O and

communications modules you can install in the ROC827 and the EXPs.

In This Chapter

3.1 Power Input Module Descriptions............................................................3-1

3.1.1 12-Volt DC Power Input Module (PM-12) ......................................3-1

3.1.2 24-Volt DC Power Input Module (PM-24) ......................................3-3

3.1.3 Auxiliary Output (AUX+ and AUX–) ...............................................3-4

3.1.4 Switched Auxiliary Output (AUXSW+ and AUXSW–)........................3-6

3.2 Determining Power Consumption............................................................3-7

3.2.1 Tuning the Configuration..............................................................3-11

3.3 Removing a Power Input Module ..........................................................3-20

3.4 Installing a Power Input Module ............................................................3-21

3.5 Connecting the ROC827 to Wiring ........................................................3-21

3.5.1 Wiring the DC Power Input Module .............................................3-22

3.5.2 Wiring the External Batteries .......................................................3-23

3.5.3 Replacing the Internal Battery .....................................................3-25

3.6 Related Specification Sheets.................................................................3-26

3.1 Power Input Module Descriptions

As a ROC800-Series controller, the ROC827 uses a Power Input module

to convert external input power to the voltage levels the ROC827’s

electronics require. The module also monitors voltage levels to ensure

proper operation. Two Power Input modules—12 V dc (PM-12) and 24 V

dc (PM-24)—are available for the ROC827.

The power consumption of a ROC827 and any attached expandable

backplanes determines the current requirements for the external power

supply. Refer to Section 3.2, “Determining Power Consumption” for a

discussion and worksheets on assessing power requirements.

The Power Input module has removable terminal blocks for wiring and

servicing. The terminal blocks can accept wire sizes 12 AWG (American

Wire Gauge) or smaller.

3.1.1 12-Volt DC Power Input Module (PM-12)

Using the PM-12, the ROC827 can accept 12 Volts dc (nominal) input

power from an AC/DC converter or other 12-volt dc supply. The input

source should be fused and connected to the BAT+ and BAT– terminals

(see Figure 3-1). The base system (CPU, power input, and backplane)

requires less than 70 mA. The Power Input module economizes power

consumption using 3.3 Volts dc switching power that provides power to

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-2

the ROC800-Series modules via the backplane. The ROC827 requires

11.25 to 14.25 Volts dc for proper operation.

Figure 3-1. 12 Volt dc Power Input Module

The CHG+ and CHG– terminals comprise an Analog Input channel that

allows you to monitor an external voltage between 0 to 18 volts dc. For

example, you can connect a solar panel upstream of the solar regulator to

monitor the output of the solar panel. This allows you to compare the

System AI Point Number 2 for the charging voltage (CHG+) to the actual

battery voltage (BAT+) System AI Point Number 1 and take action as

required. The ROC827 has a low-voltage cut-off circuit built-in to guard

against draining power supply batteries. Refer to “Automatic Self Tests”

in Chapter 1, General Information.

Use the AUX+ / AUX– terminals to supply reverse polarity protected

source voltage to external devices, such as a radio or solenoid. Use the

AUXSW+ / AUXSW– terminals to provide switched power for external

devices. The AUXSW+ is turned off when the ROC827 detects a software

configurable voltage at the BAT+ / BAT– terminals.

Table 3-1 details the specific connection information for the 12 volt dc

(PM-12) Power Input module. Table 3-2 indicates the LED fault

indicators.

VOK LED

VOFF LED

VOVER LED

TEMP LED

BAT+ / BAT–

CHG+ / CHG

–

AUX+ / AUX

–

AUXSW+ / AUXSW–

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-3

Table 3-1. 12 Volt dc Power Input Terminal Block Connections

Terminal Blocks Definition Volts DC

BAT+ and BAT– Accepts 12 Volts dc nominal from an

AC/DC converter or other 12 Volts dc

supply.

 Absolute Maximum: 11.25 to 16 Volts

 Recommended Operating Range:

11.25 to 14.25 Volts dc

CHG+ and CHG– Analog Input used to monitor an external

charging source.

 0 to 18 Volts dc

AUX+ and AUX– Supplies reverse polarity protected source

voltage to external devices. Fused.

 BAT+ minus ∼0.7 Volts dc

AUXSW+ and AUXSW– Supplies switched power for external

devices.

 0 to 14.25 Volts dc

Table 3-2. 12 Volt DC Power Input LED Fault Indicators

Signal LED

VOK Green LED on when voltage is in tolerance on BAT+ and BAT–.

VOFF Fault – Red LED on when the AUXSW+ output are disabled by

the CPU control line.

VOVER Fault – Red LED on when AUXSW+ is disabled due to excess

voltage on BAT+.

TEMP Fault – Red LED on when AUXSW+ output are disabled due to

the excess temperature of the Power Input module.

3.1.2 24-Volt DC Power Input Module (PM-24)

Using the PM-24, the ROC827 can accept 24 Volts dc (nominal) input

power from an AC/DC converter or other 24 Volts dc supply connected

to the + and – terminals. Connect the input power to either or both of the

+ and – channels. The 24 V dc Power Input module (PM-24) does not

have CHG terminals for monitoring a charging voltage, and does not

monitor the input voltage for alarming, sleep mode, or other monitoring

purposes. The module has two LEDs that indicate voltage is received at

the backplane and the CPU (see Figure 3-2 and Tables 3-3 and 3-4).

The base system (CPU, power input, and backplane) requires less than 70

mA. The Power Input module economizes power consumption using 3.3

Volts dc switching power that provides power to the I/O and

communications modules installed in the ROC827 and any expanded

backplanes. With this Power Input module installed, the ROC827 requires

20 to 30 Volts dc for proper operation.

Use the AUX+ and AUX– terminals to supply reverse polarity protected

source voltage to external devices, such as a radio or solenoid.

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-4

Figure 3-2. 24 Volt dc Power Input Module

Table 3-3. 24 Volt dc Power Input Terminal Block Connections

Terminal Blocks Definition Volts DC

+ and – Accepts 24 Volts dc nominal from an AC/DC converter

or other 24 Volts dc supply. 18 to 30 Volts dc

AUX+ and AUX– Supplies reverse polarity protected source voltage to

external devices. Fused. +12 Volts dc minus ∼0.7 Volts

Table 3-4. 24 Volt dc Power Input LED Indicators

Signal LED

V12 Green LED on when voltage is provided to backplane.

V3.3 Green LED on when voltage is provided to CPU.

3.1.3 Auxiliary Output (AUX+ and AUX–)

You can use the AUX+ and AUX– terminals to supply reverse polarity

protected source voltage to external devices, such as a radio or a solenoid.

All module terminal blocks accept 12 AWG or smaller wiring. Refer to

Figures 3-3 and 3-4.

For the 12-volt dc Power Input module (PM-12), the auxiliary output

follows the voltage located at BAT+ minus ~0.7 Volts dc, which is the

protection diode voltage drop. For example, if the BAT+ voltage is 13

volts dc, then AUX+ is ~12.3 Volts dc.

For the 12-volt dc Power Input module, AUX+ / AUX– is always on and

is current-limited by a fast acting glass 2.5 Amp x 20 mm fuse. In the

event that the fuse blows, CSA requires that you replace the 2.5 Amp

fast-acting fuse with a Little Fuse 217.025 or equivalent. Refer to

“Automatic Self Tests” in Chapter 1, General Information.

V3 LED

V12 LED

AUX+ / AUX–

+ / –

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-5

For the 24 volt Power Input module (PM-24), the AUX voltage is always

12 Volts dc minus ~0.7 Volts. AUX+ / AUX– is internally current-limited

by a 0.5 Amp Positive Temperature Coefficient (PTC).

If you need to cycle power to the radio or other device to reduce the load

on the power source (a recommended practice when using batteries), use

a Discrete Output (DO) module to switch power on and off. Refer to the

ROCLINK 800 Configuration Software User Manual (Form A6121).

AUXsw AUX

–

+ – +

2 Amp or less

Fast ActingFuse

–

Other Equipment

2.5 Amps Maximum

Current On. Non-switched

809AUX.DSF

Power Supply

Terminal Block

–

Other Equipment

14.5 Volts DC Maximum @ 0.5 Amps

Switched Powe

Figure 3-3. 12 Volt dc Auxiliary Power Wiring

AUX

– +

0.5 Amp or less

Fast Acting Fuse

Other Equipment

12 Volts DC Maximum @ 0.5 Amps

Current-Limited Always On

809AUX24.DSF

Power Supply

Terminal Block

–

Figure 3-4. 24 Volt dc Auxiliary Power Wiring

Removing the

Auxiliary Output Fuse To remove the auxiliary output fuse:

1. Perform the procedure described in Section 3.3, “Removing a Power

Input Module.”

2. Remove the fuse located at F1 on the Power Input module.

Installing the Auxiliary

Output Fuse To re-install the auxiliary output fuse:

1. Replace the fuse located at F1 on the Power Input module.

2. Perform the procedure described in Section 3.4, “Installing a Power

Input Module.”

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-6

3.1.4 Switched Auxiliary Output (AUXSW+ and AUXSW–)

The AUXSW+ and AUXSW– terminals on the 12 volt dc Power Input

module (PM-12) provide switched power for external devices, such as

radios. AUXSW+ is current-limited for protection of the power input and

the external device via a 0.5 Amp nominal Positive Temperature

Coefficient (PTC). The AUXSW+ and AUXSW– terminals provide

voltages from 0 to 14.25 Volts dc. AUXSW+ is turned off when the

ROC827 detects a software configurable voltage (LoLo Alarm) at the

BAT+ and BAT– terminals. All module terminal blocks accept 12 AWG

or smaller wiring. Refer to Figure 3-3.

If the source voltage falls to a level below which reliable operation cannot

be ensured, the hardware circuitry on the Power Input module

automatically disables the AUXSW+ outputs. This activity occurs at

approximately 8.85 Volts dc, and is based on the LoLo Alarm limit set for

the System Battery Analog Input Point Number 1. The low input voltage

detect circuit includes approximately 0.75 Volts dc of hysteresis between

turn-off and turn-on levels.

The presence of high input voltage can damage the linear regulator. If the

dc input voltage at BAT+ exceeds 16 volts, the over-voltage detect circuit

automatically disables the linear regulator, shutting off the unit. For

further information on the STATUS LED functions, refer to Table 2-2 in

Chapter 2, Installation and Use.

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-7

3.2 Determining Power Consumption

Determining the power consumption requirements for a ROC827

configuration involves the following steps:

1. Determine your ideal ROC827 configuration, which includes

identifying all modules, device relays, meters, solenoids, radios,

transmitters, and other devices that may receive DC power from the

complete ROC827 configuration (base unit and EXPs).

Note: You should also identify any devices (such as a touch screen

panel) that may be powered by the same system but not necessarily by

the ROC827.

2. Calculate the “worst-case” DC power consumption for that

configuration by totaling the combined power draw required for all

installed modules, as well as accounting for the power any modules

provide to external devices (through the use of +T).

Note: “+T” describes the isolated power some modules (such as AI,

AO, PI, and HART) may supply to external devices, such as 4–20 mA

pressure and temperature transducers.

3. Verify that the power input module you intend to use can meet the

power requirements calculated in the first step.

This verification helps you identify and anticipate power demands

from +T external devices that exceed the capabilities of the PM-12 or

PM-24 Power Input modules. In this case, you can then make

arrangements to externally power these field devices.

4. “Tune” (if necessary) the configuration by providing external power

or re-assessing the configuration to lessen the power requirements

from the ROC827.

To assist you in this process, this chapter contains a series of worksheets

(Tables 3-5 through 3-16) that help you to identify and assess the power

requirements for each component of your ROC827 system. Table 3-5

identifies the power requirements related to the ROC827 base unit and

summarizes the power requirements you identify on Tables 3-6 through

3-16. (Complete Tables 3-6 through 3-15 to calculate the power

consumption for each of the I/O modules, and then transfer those results

to Table 3-5.) Completing Table 3-5 enables you to quickly determine

whether the power input module you intend to use is sufficient for your

configuration. If the power module is not sufficient, you can then review

individual worksheets to determine how to best “tune” your configuration

and lessen power demands.

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-8

General Calculation

Process To calculate the power the ROC827 requires:

1. Determine the kind and number of communication modules and the

kind and number of expanded backplanes you are implementing.

Enter those values in the Quantity Used column of Table 3-5.

2. Multiply the PTypical value by the Quantity Used. Enter the values in

the Sub-Total column of Table 3-5. Perform this calculation for both

the communications module and the LED.

3. Determine the kind and number of I/O modules you are implementing

and complete Tables 3-6 through 3-15 for those modules. For each

applicable I/O module:

a. Calculate the PTypical values and enter them in the PTypical columns

of each table. Perform this calculation for the I/O modules, LEDs

(if applicable), channels (if applicable), and any other devices.

b. Calculate the Duty Cycle value for each I/O module and each I/O

channel (as applicable). Enter those values in the Duty Cycle

column of Tables 3-6 through 3-15.

c. Multiply the PTypical values by the Quantity Used by the Duty

Cycle on each applicable table. Enter those individual sub-totals

in the Sub-Total column on each table and add the sub-totals to

calculate the Total for the table.

4. Transfer the totals from Tables 3-6 through 3-15 to their respective

lines in the Sub-Total column on Table 3-5.

5. Add the Sub-Total values for Tables 3-6 through 3-15. Enter that

value in the Total for All Modules line on Table 3-5.

6. Add the value from the Total for ROC827 Base Unit to the Total for

All Modules. Enter that result in the Total for ROC827 Base Unit and

All Modules line.

7. Transfer the Other Devices total from Table 3-16 to its respective line

in the Sub-Total column on Table 3-5.

8. Add the values from Total for ROC827 Base Unit, Total for All

Modules, and the total for Other Devices. Enter that value in the Total

for ROC827 Base Unit, All Modules, and Other Devices line.

9. Multiply the value in the Total for ROC827 Base Unit, Total for All

Modules, and Other Devices by 0.25. Enter the result in the Power

System Safety Factor (0.25) line.

Note: This value represents a safety factor to the power system to

account for losses and other variables not factored into the power

consumption calculations. This safety factor may vary depending on

external influences. Adjust the factor value up or down accordingly.

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-9

10. Add the values for the Power System Safety Factor (0.25) to the Total

for ROC827 Base Unit, All Modules, and Other Devices to determine

the total estimated power consumption for the configured ROC827

system.

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-10

Table 3-5. Estimated Power Consumption

Power Consumption (mW)

Device Description PTYPICAL

Quantity

Used Sub-Total

(mW)

CPU and ROC827 Backplane

Power Input Module PM-12 110 mA @ 12 volts dc 1320 mW

Power Input Module PM-24 55 mA @ 24 volts dc 1320 mW

Per Active LED – Maximum 10 1.5 mA 18 mW

EIA-232 (RS-232) Module 4 mA @ 12 volts dc 48 mW

Per Active LED – Maximum 4 1.5 mA 18 mW

EIA-422/485 (RS-422/485) Module 112 mA @ 12 volts 1344 mW

Per Active LED – Maximum 2 1.5 mA 18 mW

Dial-up Modem Module 95 mA @ 12 volts dc 1140 mW

Per Active LED – Maximum 4 1.5 mA 18 mW

Expanded Backplanes

70 mA @ 12 volts dc 840 mW

35 mA @ 24 volts dc 840 mW

Total for ROC827 Base Unit mW

AI Modules Total (from Table 3-6)

AO Modules Total (from Table 3-7)

DI Modules Total (from Table 3-8)

DO Modules Total (from Table 3-9)

DOR Modules Total (from Table 3-10)

PI Modules Total (from Table 3-11)

MVS Modules Total (from Table 3-12)

RTD Modules Total (from Table 3-13)

Thermocouple Modules Total (from Table 3-14)

HART Modules Total (from Table 3-15)

Total for All Modules mW

Total for ROC827 Base Unit and All Modules mW

Other Devices Total (from Table 3-16) mW

Total for ROC827 Base Unit, All Modules, and

Other Devices mW

Power System Safety Factor (0.25) mW

Total for Configured ROC827 mW

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-11

3.2.1 Tuning the Configuration

The PM-12 Power Input module can supply a maximum of 36 W (36000

mW) to the backplane, which includes the +T overhead. The PM-24,

when operating between –40°C to 55°C, can supply a maximum of 30 W

(30000 mW) to the backplane. Across its entire operating range (–40°C to

85°C) the PM-24 can supply 24 W (24000 mW).

Refer to Table 3-5 and the value you entered in the Total for ROC827

Base Unit and All Modules line. That is the value against which you

“tune” your configuration to accommodate your Power Input module. If

your configuration requires more power than the Power Input module you

intend to use, you need to modify your I/O module configuration to

reduce your power requirements.

Tuning Hints Review the content of Tables 3-6 through 3-15. Suggestions to help

you better align the configuration of your ROC827 with the capability

of the Power Input module you intend to use include:

 Reduce the +T usage by providing an external power supply for as

many transmitters or field devices needed to reduce the value in the

Total for ROC827 Base Unit and All Modules line on Table 3-5 to

below the capability of the Power Input module you intend to use.

 Reduce the +T usage by reducing the number of transmitters or field

devices.

 Reduce the total number of I/O modules by consolidating transmitters

or field devices onto as few I/O modules as possible.

Note: Tuning your I/O module configuration may require several

iterations to rework the content of Tables 3-6 through 3-15 until your

power requirements match the capability of the Power Input module you

intend to use.

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-12

Table 3-6. Power Consumption of the Analog Input Modules

Power Consumption (mW)

I/O Module Description PTYPICAL

Quantity

Used Duty

Cycle Sub-Total

(mW)

ANALOG INPUT

AI Module Base 84 mA @ 12 volts dc 1008 mW

Jumper set for +T @ 12 volts dc

Channel 1 Channel’s mA current

draw from +T * 1.25 * 12

Channel 2 Channel’s mA current

draw from +T * 1.25 * 12

Channel 3 Channel’s mA current

draw from +T * 1.25 * 12

Channel 4 Channel’s mA current

draw from +T * 1.25 * 12

Jumper set for +T @ 24 volts dc

Channel 1 Channel’s mA current

draw from +T * 2.50 * 12

Channel 2 Channel’s mA current

draw from +T * 2.50 * 12

Channel 3 Channel’s mA current

draw from +T * 2.50 * 12

Channel 4 Channel’s mA current

draw from +T * 2.50 * 12

Table Total

Duty Cycle The duty cycle is based on the average current flow compared to the

full-scale current flow value. To approximate the duty cycle, estimate

the average current consumption in relation to its maximum range. For

example, if an AI channel’s current averages 16 mA:

Duty Cycle = Average mA output ÷ Maximum mA Output = (16 ÷ 20) = 0.80

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-13

Table 3-7. Power Consumption of the Analog Output Modules

Power Consumption (mW)

I/O Module Description PTYPICAL

Quantity

Used Duty

Cycle Sub-Total

(mW)

AO Module Base 100 mA @ 12 volts dc 1200 mW

Jumper set for +T @ 12 volts dc

Channel 1 Channel’s mA current

draw from +T * 1.25 * 12

Channel 2 Channel’s mA current

draw from +T * 1.25 * 12

Channel 3 Channel’s mA current

draw from +T * 1.25 * 12

Channel 4 Channel’s mA current

draw from +T * 1.25 * 12

Jumper set for +T @ 24 volts dc

Channel 1 Channel’s mA current

draw from +T * 2.50 * 12

Channel 2 Channel’s mA current

draw from +T * 2.50 * 12

Channel 3 Channel’s mA current

draw from +T * 2.50 * 12

Channel 4 Channel’s mA current

draw from +T * 2.50 * 12

Table Total

Duty Cycle The duty cycle is based on the average current flow compared to the

full-scale current flow value. To approximate the duty cycle, estimate

the average current consumption in relation to its maximum range. For

example, if an AO channel’s current averages 12 mA:

Duty Cycle = Average mA output ÷ Maximum mA Output = (12 ÷ 20) = 0.60

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-14

Table 3-8. Power Consumption of the Discrete Input Modules

Power Consumption (mW)

I/O Module Description PTYPICAL

Quantity

Used Duty

Cycle Sub-Total

(mW)

DI Module Base 19 mA @ 12 volts dc No

Channels Active 228 mW

Channel 1 3.2 mA @ 12 volts dc 38.4 mW

Channel 2 3.2 mA @ 12 volts dc 38.4 mW

Channel 3 3.2 mA @ 12 volts dc 38.4 mW

Channel 4 3.2 mA @ 12 volts dc 38.4 mW

Channel 5 3.2 mA @ 12 volts dc 38.4 mW

Channel 6 3.2 mA @ 12 volts dc 38.4 mW

Channel 7 3.2 mA @ 12 volts dc 38.4 mW

Channel 8 3.2 mA @ 12 volts dc 38.4 mW

Per Active LED –

Maximum 8 1.5 mA 18 mW

Table Total

Duty Cycle The duty cycle is the time on divided by the total time, and is

essentially the percent of time that the I/O channel is active

(maximum power consumption).

Duty Cycle = Active time ÷ (Active time + Inactive time)

For example, if a Discrete Input is active for 15 seconds out of every 60

seconds:

Duty Cycle = 15 seconds ÷ (15 seconds + 45 seconds) = 15 seconds ÷ 60 seconds = 0.25

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-15

Table 3-9. Power Consumption of the Discrete Output Modules

Power Consumption (mW)

I/O Module Description PTYPICAL

Quantity

Used Duty

Cycle Sub-Total

(mW)

DO Module 20 mA @ 12 volts dc No

Channels Active 240 mW

Channel 1 1.5 mA 18 mW

Channel 2 1.5 mA 18 mW

Channel 3 1.5 mA 18 mW

Channel 4 1.5 mA 18 mW

Channel 5 1.5 mA 18 mW

Per Active LED –

Maximum 5 1.5 mA 18 mW

Table Total

Duty Cycle The duty cycle is the time on divided by the total time, and is

essentially the percent of time that the I/O channel is active

(maximum power consumption).

Duty Cycle = Active time ÷ (Active time + Inactive time)

For example, if a Discrete Output is active for 15 seconds out of every 60

seconds:

Duty Cycle = 15 seconds ÷ (15 seconds + 45 seconds) = 15 seconds ÷ 60 seconds = 0.25

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-16

Table 3-10. Power Consumption of the Discrete Output Relay Modules

Power Consumption (mW)

I/O Module Description PTYPICAL

Quantity

Used Duty

Cycle Sub-Total

(mW)

DOR Module 6.8 mA @ 12 volts dc

No Channels Active 81.6 mW

Channel 1 150 mA for 10 mSec

during transition 1800 mW

for 10 mSec

Channel 2 150 mA for 10 mSec

during transition 1800 mW

for 10 mSec

Channel 3 150 mA for 10 mSec

during transition 1800 mW

for 10 mSec

Channel 4 150 mA for 10 mSec

during transition 1800 mW

for 10 mSec

Channel 5 150 mA for 10 mSec

during transition 1800 mW

for 10 mSec

Per Active LED –

Maximum 5 1.5 mA 18 mW for

10 mSec

Table Total

Duty Cycle The duty cycle is:

[((Number of Transitions in some time period) * 0.01 sec)] ÷ (Seconds in the period) = Duty Cycle

For example, if a DOR channel changes state 80 times per hour:

 80 = Number of transitions.

 Hour is the time period.

 An hour contains 3600 seconds.

Calculate the duty cycle as:

Duty Cycle = [(80 * 0.01) ÷ 3600] = 0.0002

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-17

Table 3-11. Power Consumption of the High and Low Speed Pulse Input Modules

Power Consumption (mW)

I/O Module Description PTYPICAL

Quantity

Used Duty

Cycle Sub-Total

(mW)

PI Module 21 mA @ 12 volts dc No

Channels Active 252 mW

Channel 1 7.4 mA 88.8 mW

Channel 2 7.4 mA 88.8 mW

Per Active LED –

Maximum 4 1.5 mA 18 mW

Jumper set to +T @ 12

volts dc 1.25 * Measured Current

Draw at +T Terminal

Jumper set to +T @ 24

volts dc 2.5 * Measured Current

Draw at +T Terminal

Table Total

Duty Cycle The duty cycle is the time on divided by the total time, and is

essentially the percent of time that the I/O channel is active

(maximum power consumption).

Duty Cycle = [Active Time * (Signals Duty Cycle)] ÷ (Total Time Period)

For example, if a Pulse Input receives a signal for 6 hours over a 24-hour

time period and the signal’s wave form is on time for 1/3 of the signal’s

period:

Duty Cycle = [6 hours * (1 ÷ 3)] ÷ (24 hours) = 0.0825

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-18

Table 3-12. Power Consumption of the MVS Modules

Power Consumption (mW)

I/O Module Description PTYPICAL

Quantity

Used Duty

Cycle Sub-Total

(mW)

MVS Module 112 mA @ 12 volts dc 1344 mW

Per Active LED – Maximum 2 1.5 mA 18 mW

Power provided by the module

for the MVS sensors

1.25 * Measured

Current Draw at +

Terminal

Table Total

Note: For an MVS sensor, the typical mW per MVS is about 300 mW.

Duty Cycle The duty cycle is the time on divided by the total time. For an MVS,

the sensor is always drawing power, so enter the duty cycle as “1” for

the MVS power calculations. The LEDs can also have an associated

duty cycle, which is essentially the percent of time that the LEDs are

active.

Duty Cycle = Active time ÷ (Active time + Inactive time)

For example, if the LEDs are on approximately 20 minutes a day:

Duty Cycle = 20 minutes ÷ (24 * 60 minutes in a day) = 20 ÷ 1440 = 0.014

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-19

Table 3-13. Power Consumption of the RTD Modules

Power Consumption (mW)

I/O Module Description PTYPICAL

Quantity

Used Duty

Cycle Sub-Total

(mW)

RTD Module 65 mA @ 13.25 volts dc 1

Table Total

Duty Cycle An RTD has no associated duty cycle. Consequently, always set “1”

as the duty cycle value.

Table 3-14. Power Consumption of the Thermocouple Modules

Power Consumption (mW)

I/O Module Description PTYPICAL

Quantity

Used Duty

Cycle Sub-Total

(mW)

TYPE J OR K THERMOCOUPLE MODULE

T/C Module 84 mA @ 12 volts dc 1008 mW 1

Table Total

Duty Cycle A thermocouple has no associated duty cycle. Consequently, always

set “1” as the duty cycle value.

Table 3-15. Power Consumption of the HART Modules

Power Consumption (mW)

Other Device Description PTYPICAL

Quantity

Used Duty

Cycle Sub-Total

(mW)

HART Module Base 110 mA @ 12 volts dc 1320 mW

Each Channel Channel’s mA current

draw from +T * 2.50 * 12

Table Total

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-20

Table 3-16. Power Consumption of Other Devices

Power Consumption (mW)

Other Device Description PTYPICAL

Quantity

Used Duty

Cycle Sub-Total

(mW)

Total

Although Tables 3-5 and Tables 3-6 through 3-15 take into account the

power the ROC827 supplies to its connected devices, be sure to add the

power consumption (in mW) of any other devices (such as radios or

solenoids) used with the ROC827 in the same power system, but which

are not accounted for in Tables 3-6 through 3-15.

Enter that Total value in the Other Devices line of Table 3-5.

3.3 Removing a Power Input Module

To remove the Power Input module:

Caution Failure to exercise proper electrostatic discharge precautions, such as

wearing a grounded wrist strap may reset the processor or damage

electronic components, resulting in interrupted operations.

When working on units located in a hazardous area (where explosive

gases may be present), make sure the area is in a non-hazardous state

before performing procedures. Performing these procedures in a

hazardous area could result in personal injury or property damage.

1. Perform the backup procedure described in “Preserving Configuration

and Log Data” in Chapter 6, Troubleshooting.

2. Remove power from the ROC827.

3. Remove the wire channel cover.

4. Unscrew the two captive screws on the front of the Power Input

module.

5. Remove the Power Input module.

Note: If you intend to store the ROC827 for an extended period, also

remove the internal backup battery.

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-21

3.4 Installing a Power Input Module

To install the Power Input module:

Caution Failure to exercise proper electrostatic discharge precautions, such as

wearing a grounded wrist strap may reset the processor or damage

electronic components, resulting in interrupted operations.

When working on units located in a hazardous area (where explosive

gases may be present), make sure the area is in a non-hazardous state

before performing procedures. Performing these procedures in a

hazardous area could result in personal injury or property damage.

Note: Remove the plastic module cover and wire channel cover, if

present.

1. Slide the Power Input module into the slot.

2. Press the module firmly into the slot. Make sure the connectors at the

back of the Power Input module fit into the connectors on the

backplane.

3. Tighten the two captive screws on the front of the Power Input

module firmly (refer to Figures 3-1 and 3-2).

4. Replace the wire channel cover.

5. Review “Restarting the ROC827” in Section 6, Troubleshooting.

6. Return power to the ROC827.

3.5 Connecting the ROC827 to Wiring

The following paragraphs describe how to connect the ROC827 to power.

Use the recommendations and procedures described in the following

paragraphs to avoid damage to equipment.

Use 12 American Wire Gauge (AWG) wire or smaller for all power

wiring.

Caution Always turn off the power to the ROC827 before you attempt any type of

wiring. Wiring of powered equipment could result in personal injury or

property damage.

To avoid circuit damage when working with the unit, use appropriate

electrostatic discharge precautions, such as wearing a grounded wrist

strap.

To connect the wire to the removable block compression terminals:

1. Bare the end (¼ inch maximum) of the wire.

2. Insert the bared end into the clamp beneath the termination screw.

3. Tighten the screw.

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-22

The ROC827 should have a minimum of bare wire exposed to prevent

short circuits. Allow some slack when making connections to prevent

strain.

3.5.1 Wiring the DC Power Input Module

Use 12 American Wire Gauge (AWG) wire or smaller for all power

wiring. It is important to use good wiring practice when sizing, routing,

and connecting power wiring. All wiring must conform to state, local, and

NEC codes.

Verify the hook-up polarity is correct.

To make DC power supply connections:

1. Perform the backup procedure described in “Preserving Configuration

and Log Data” in Chapter 6, Troubleshooting.

2. Install a surge protection device at the service disconnect.

3. Remove all other power sources from the ROC827.

4. Install a fuse at the input power source.

5. Remove the terminal block connector from the socket.

6. Insert each bared wire end from either the:

 12 Volts dc source into the clamp beneath the appropriate BAT+ /

BAT– termination screw.

 24 Volts dc source into the clamp beneath the appropriate BAT+ /

BAT– termination screw. The + terminal should have a similar

fuse to the 12 Volts dc Power Input Module.

– CHG+ – BAT+

12 Volt DC Battery Bank

AC to 12 Volt DC Power Supply

24 Volt DC/12 Volt DC Power Converter

Other 12 Volt DC Nominal Source

BATWIRE.DSF

5 Amp Fuse

Figure 3-5. 12 Volts dc Power Supply and BAT+ / BAT– Wiring

7. Screw each wire into the terminal block.

8. Plug the terminal block connector back into the socket.

9. If you are monitoring an external charge voltage (12 Volts dc Power

Input Module only), wire the CHG+ and CHG– terminal block

connector. Refer to Figure 3-6.

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-23

– CHG+ – BAT+

5 Amp Fuse

+–+–+–+–

–

Batteries

809CHG.DSF

Solar

Regulator Solar

Panel

–

5 Amp Fuse

Power Supply

Terminal Block

Figure 3-6. 12 Volt dc Power Supply and CHG+ and CHG– Wiring

10. Replace all other power sources (if necessary) to the ROC827.

11. Review “Restarting the ROC827” in Chapter 6, Troubleshooting.

Note: Refer to Table 3-2 concerning LEDs.

3.5.2 Wiring the External Batteries

You can use external batteries as the main source of power for the

ROC827 with the 12 volts dc Power Input module (PM-12). The

maximum voltage that can be applied to the BAT+ / BAT– terminals is

16 volts dc before damage may occur. The recommended maximum

voltage is 14.5 volts dc (refer to Table 3-2 concerning LEDs).

It is important that you use good wiring practices when sizing, routing,

and connecting power wiring. All wiring must conform to state, local, and

NEC codes. Use 12 American Wire Gauge (AWG) or smaller wire for all

power wiring.

Batteries should be rechargeable, sealed, gel-cell, lead-acid batteries.

Connect batteries in parallel to achieve the required capacity (refer to

Figure 3-6). The amount of battery capacity required for a particular

installation depends upon the power requirements of the equipment and

days of reserve (autonomy) desired. Calculate battery requirements based

on power consumption of the ROC827 and all devices powered by the

batteries.

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-24

Battery Reserve Battery reserve is the amount of time that the batteries can provide

power without discharging below 20% of their total output capacity.

The battery reserve should be a minimum of five days, with ten days

of reserve preferred. Add 24 hours of reserve capacity to allow for

overnight discharge. Space limitations, cost, and output are all factors

that determine the actual amount of battery capacity available.

To determine the system capacity requirements, multiply the system

current load on the batteries by the amount of reserve time required, as

shown in the following equation:

System Requirement = Current Load in Amps * Reserve Hours = _____ Amp Hours

Caution When using batteries, apply in-line fusing to avoid damaging the ROC827.

To make battery connections:

1. Perform the backup procedure described in “Preserving Configuration

and Log Data” in Chapter 6, Troubleshooting.

2. Remove the BAT+ and BAT– terminal block connector from the

socket.

3. Install a fuse at the input power source.

4. Insert each bared wire end into the clamp beneath the BAT+ and

BAT– termination screws (refer to Figure 3-5).

5. Screw each wire into the terminal block.

6. Review “Restarting the ROC827” in Chapter 6, Troubleshooting.

7. Re-apply power to the ROC827.

Note: Refer to Table 3-2 concerning LEDs.

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-25

3.5.3 Replacing the Internal Battery

The internal Sanyo 3 volt CR2430 lithium backup battery located on the

CPU provides backup of the data and the Real-Time Clock when the

main power is not connected. The battery has a one-year minimum

backup life while the battery is installed and no power is applied to the

ROC827. The battery has a ten-year backup life while the backup battery

is installed and power is applied to ROC827 or when the battery is

removed from the ROC827.

Recommended replacement Lithium/Manganese Dioxide batteries

include:

Table 3-17. Replacement Battery Types

Part Battery, Lithium, 3V

Size 24 mm (0.94 in) diameter x 3 mm (0.12 in) height

Type Coin Type

Capacity 280 mAh minimum

Acceptable Types  Duracell DL2430

 Eveready CR2430

 Sanyo CR2430

 Varta CR2430

Note: Remove the internal backup battery if you intend to store the

ROC827 for an extended period.

Caution When working on units located in a hazardous area (where explosive

gases may be present), make sure the area is in a non-hazardous state

before performing these procedures. Performing these procedures in a

hazardous area could result in personal injury or property damage.

To avoid circuit damage when working inside the unit, use appropriate

electrostatic discharge precautions, such as wearing a grounded wrist

strap.

1. Perform the backup procedure described in “Preserving Configuration

and Log Data” in Chapter 6, Troubleshooting.

Note: Removing the battery erases the contents of the ROC827’s

RAM.

2. Remove all power from the ROC827.

3. Remove the wire channel cover.

4. Remove the two screws on the CPU faceplate.

5. Remove the CPU faceplate.

6. Remove the CPU (as described in “Removing the CPU Module” in

Chapter 2, Installation and Use).

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-26

7. Insert a plastic screwdriver behind the battery and gently push the

battery out of the battery holder. Note how the battery is oriented:

the negative side of the battery (–) is placed against the CPU and the

positive (+) towards the + label on the battery holder.

8. Insert the new battery in the battery holder paying close attention to

install the battery with the correct orientation.

9. Reinstall the CPU (as described in “Installing the CPU Module” in

Chapter 2, Installation and Use).

10. Replace the CPU faceplate.

11. Replace the two screws to secure the CPU faceplate.

12. Replace the wire channel cover.

13. Review “Restarting the ROC827” in Chapter 6, Troubleshooting.

14. Apply power to the ROC827.

3.6 Related Specification Sheets

Refer to the following specification sheets (available at

www.EmersonProcess.com/flow) for additional and most-current

information on the Power Input modules for the ROC827.

Table 3-18. Power Input Module Specification Sheets

Name Form Number Part Number

Power Input Modules (ROC800-Series) 6.3:PIM D301192X012

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-1

Chapter 4 – Input/Output Modules

This chapter describes the Input/Output (I/O) modules used with the

ROC827 and expandable backplanes and contains information on

installing, wiring, and removing the I/O modules.

In This Chapter

4.1 I/O Module Overview ...............................................................................4-1

4.2 Installation................................................................................................4-3

4.2.1 Installing an I/O Module .................................................................4-4

4.2.2 Removing an I/O Module ...............................................................4-5

4.2.3 Wiring I/O Modules ........................................................................4-6

4.3 Analog Input Modules..............................................................................4-6

4.4 Analog Output Modules ...........................................................................4-8

4.5 Discrete Input Modules............................................................................4-9

4.6 Discrete Output Modules .......................................................................4-10

4.7 Discrete Output Relay Modules.............................................................4-11

4.8 Pulse Input Modules ..............................................................................4-12

4.9 RTD Input Modules................................................................................4-14

4.9.1 Connecting the RTD Wiring .........................................................4-15

4.10 J and K Type Thermocouple Input Modules..........................................4-16

4.11 Related Specification Sheets.................................................................4-21

4.1 I/O Module Overview

The I/O modules typically consist of a terminal block for field wiring and

connectors to the backplane. The ROC827 base unit supports up to three

I/O modules. Each expandable backplane (EXP) can accommodate up to

six I/O modules, and a fully configured ROC827 can handle up to 27 I/O

modules (three on the base unit and six modules on each of up to four

expandable backplanes). Each I/O module electrically connects to field

wiring by a removable terminal block. Refer to Figures 4-1 and 4-2.

Note: Figure 4-2 represents a ROC827 with one EXP.

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-2

DOC0513A

Front View Side View

Figure 4-1. Typical I/O Module

Figure 4-2. Optional I/O Module Locations (ROC827 with one EXP)

I/O modules for the ROC827 include:

 Analog Input (AI) modules that provide the ability to monitor various

analog field values.

 Discrete Input (DI) and Pulse Input (PI) modules that provide the

ability to monitor various discrete and pulse input field values.

I/O Slot #1 o

Comm 3

I/O Slot #2 o

Comm 3 or 4

I/O Slot #3 o

Comm 3, 4, or 5

I/O Slot #7

I/O Slot #6

I/O Slot #5

I/O Slot #8

I/O Slot #9

I/O Slot #4

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-3

 Analog Output (AO), Discrete Output (DO), and Discrete Output

Relay (DOR) modules that provide the ability to manage various

control devices.

 The RTD Input and Thermocouple Input (T/C) modules that provide

the ability to monitor various analog temperature field values.

 The Highway Addressable Remote Transducer (HART) interface

modules that enable the ROC827 to communicate with HART devices

using the HART protocol as either Analog Inputs or Analog Outputs.

Each module rests in a module slot at the front of the ROC827 base unit or

EXP housing. You can easily install or remove I/O modules from the

module slots while the ROC827 is powered up (hot-swappable). Modules

may be installed directly into unused module slots (hot-pluggable), and

modules are self-identifying in the software. All modules have removable

terminal blocks to make servicing easy. I/O modules can be added in any

module slot.

The I/O modules acquire power from the backplane. Each module has an

isolated DC/DC converter that provides logic, control, and field power as

required. The ROC827 has eliminated the need for fuses on the I/O

modules through the extensive use of current-limited short-circuit

protection and over voltage circuitry. Isolation is provided from other

modules and the backplane, power, and signal isolation. The I/O modules

are self-resetting after a fault clears.

4.2 Installation

Each I/O module installs in the ROC827 in the same manner. You can

install any I/O module into any module socket, whether empty or in place

of another module.

Caution Failure to exercise proper electrostatic discharge precautions, such as

wearing a grounded wrist strap may reset the processor or damage

electronic components, resulting in interrupted operations.

When installing units in a hazardous area, make sure all installation

components selected are labeled for use in such areas. Installation and

maintenance must be performed only when the area is known to be non-

hazardous. Installation in a hazardous area could result in personal injury

or property damage.

You can insert or remove the I/O modules while power is connected to the

ROC827. If the ROC827 is powered, exercise caution while performing

the following steps to install a module.

Note: After you install a new I/O module or replace an existing I/O

module, it may be necessary to reconfigure the ROC827. To change

configuration parameters, use ROCLINK 800 software to make changes to

the new module. Any added modules (new I/O points) start up with

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-4

default configurations. Refer to the ROCLINK 800 Configuration Software

User Manual (Form A6121).

4.2.1 Installing an I/O Module

To install an I/O module in either the ROC827 or the EXP:

1. Remove the wire channel cover.

Note: Leaving the wire channel cover in place can prevent the module

from correctly connecting to the socket on the backplane.

2. Perform one of the following:

 If there is a module currently in the slot, unscrew the captive

screws and remove that module (refer to “Removing an I/O

Module”).

 If the slot is currently empty, remove the module cover.

3. Insert the new I/O module through the module slot on the front of the

ROC827 or EXP housing. Make sure the label on the front of the

module faces right side up (refer to Figure 4-3). Gently slide the

module in place until it contacts properly with the connectors on the

backplane.

Note: If the module stops and will not go any further, do not force the

module. Remove the module and see if the pins are bent. If the pins are

bent, gently straighten the pins and re-insert the module. The back of

the module must connect fully with the connectors on the backplane.

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-5

Figure 4-3. Installing an I/O Module

4. Tighten the captive screws on the front of the module.

5. Wire the I/O module (refer to “Wiring I/O Modules”).

6. Replace the wire channel cover.

Caution Never connect the sheath surrounding shielded wiring to a signal ground

terminal or to the common terminal of an I/O module. Doing so makes the

I/O module susceptible to static discharge, which can permanently

damage the module. Connect the shielded wiring sheath only to a suitable

earth ground.

7. Connect to ROCLINK 800 software and login. The I/O modules are

self-identifying after re-connecting to ROCLINK 800 software.

8. Configure the I/O point.

4.2.2 Removing an I/O Module

To remove an I/O module:

1. Remove the wire channel cover.

2. Unscrew the two captive screws holding the module in place.

3. Gently pull the module’s lip out and remove the module from the slot.

You may need to gently wiggle the module.

4. Install a new module or install the module cover.

5. Screw the two captive screws to hold the module or cover in place.

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-6

6. Replace the wire channel cover.

4.2.3 Wiring I/O Modules

All modules have removable terminal blocks for convenient wiring and

servicing. The terminal blocks can accommodate a wide range of wire

gauges (12 AWG or smaller).

Caution Failure to exercise proper electrostatic discharge precautions, such as

wearing a grounded wrist strap may reset the processor or damage

electronic components, resulting in interrupted operations.

To connect the wire to the removable block compression terminals:

1. Bare the end (¼ inch maximum) of the wire.

2. Insert the bared end into the clamp beneath the termination screw.

3. Tighten the screw.

The ROC827 should have a minimum of bare wire exposed to prevent

short circuits. Allow some slack when making connections to prevent

strain.

Note: All modules have removable terminal blocks for convenient wiring

and servicing. Twisted-pair cable is recommended for I/O signal wiring.

The removable terminal blocks accept 12 AWG or smaller wire.

4.3 Analog Input Modules

The four Analog Input (AI) channels are scalable, but typically measure

either:

 4- to 20-mA analog signal, with the use of a precision resistor

(supplied).

 1 to 5 Volts dc signal.

If required, you can calibrate the low end of the analog signal to zero.

You can configure the AI (+T) module as either 12 or 24 Volt dc using

jumper J4 on the I/O module (see Figure 4-4). The AI modules can

provide isolated +12 Volt dc or +24 Volt dc field transmitter power on a

per-module basis. For example, one module can provide +12 Volts dc for

powering low power analog transmitters, while another module in the

same ROC827 can provide +24 Volts dc for powering conventional 4- to

20-mA transmitters. Refer to Figure 4-5:

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-7

Figure 4-4. Analog Input Jumper J4 – Set to +24V

1-5 VOLT DEVICE

EXTERNALLY POWERED

1-5 VOLT DEVICE

EXTERNALLY POWERED

ROC809 POWERED

CURRENT LOOP DEVICE 4-20mA

OUT SIGNAL

COM IN

DOC0506A

Figure 4-5. Analog Input Module Field Wiring

Note: All I/O modules are isolated on the field side. Be aware that you can

induce ground loops by tying commons from various modules together.

Precision

Resisto

+T 12 / 24 V dc

Jumper

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-8

4.4 Analog Output Modules

The 16-bit Analog Output (AO) module has four channels that provide a

current output for powering analog devices. Analog Outputs are analog

signals the ROC827 generates to regulate equipment, such as control

valves or any device requiring analog control.

Each channel on this module provides a 4- to 20-mA current signal for

controlling analog current loop devices. The AO module isolation includes

the power supply connections.

Note: AO modules (Part Number W38199) with front labels that read AO-

16 are an earlier version that controls the low side current. AO modules

(Part Number W38269) with front labels that read AO are the newer

version (January 2005 and later) and control the high side current.

You can configure the AO module as either 12 or 24 Volts dc via jumper

J4 on the I/O module (see Figure 4-6). The AO module can provide

isolated +12 Volts dc or +24 Volts dc field transmitter power on a per

module basis. For example, one module can provide +12 Volts dc for

powering low-power analog transmitters, while another module in the

same ROC827 can provide +24 Volts dc for powering conventional 4- to

20-mA transmitters. Refer to Figure 4-7.

Figure 4-6. Analog Output Jumper J4 (Shown Set to +12V)

+T 12 / 24 V dc

Jumper

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-9

Figure 4-7. Analog Output Module Field Wiring

Note: All I/O modules are isolated on the field side. Be aware that you can

induce ground loops by tying commons from various modules together.

4.5 Discrete Input Modules

The eight-channel Discrete Input (DI) modules monitor the status of

relays, open collector/open drain type solid-state switches, and other two-

state devices. Discrete Inputs come from relays, switches, and other

devices, which generate an on/off, open/close, or high/low signal.

The DI module provides a source voltage for dry relay contacts or for an

open-collector solid-state switch.

The DI module’s LEDs light when each input is active.

Each DI channel can be software-configured to function as a momentary

or latched DI. A latched DI remains in the active state until reset. Other

parameters can invert the field signal and gather statistical information on

the number of transitions and the time accumulated in the on- or off-state.

Caution The Discrete Input module operates with non-powered discrete devices,

such as “dry” relay contacts or isolated solid-state switches. Use of the DI

module with powered devices may cause improper operation or damage.

The DI module senses the current flow, which signals the ROC827

electronics that the relay contacts have closed. The opening of the contacts

interrupts the current flow and the DI module signals the ROC827

electronics that the relay contacts have opened. A ROC827 can read a DI a

maximum of 20 times per second (50 millisecond scan).

250

CONTROL

CURRENT LOOP

DOC0505A

CONTROL

CURRENT LOOP

CONTROL

CURRENT LOOP

CONTROL

CURRENT LOOP +

CURRENT LOOP DEVICE 4-20mA

ROC800 POWERED

1-5 VOLT CONTROL DEVICE

Representative

Internal Circuit Field Wiring

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-10

The left side of Figure 4-8 displays the internal circuitry while the right

side displays possible field wiring.

Note: All I/O modules are isolated on the field side. Be aware that you can

induce ground loops by tying commons from various modules together.

-DRY CONTACT

ROC800 POWERED

6.6KW

DOC0507A

COM

8 CHAN

OPEN DRAIN TYPE DEVICE

OPEN COLLECTOR

EXTERNALLY POWERED

Figure 4-8. Discrete Input Module Field Wiring

4.6 Discrete Output Modules

The five-channel Discrete Output (DO) module provides two-state outputs

to energize solid-state relays and power small electrical loads. These are

solid-state relays. A Discrete Output may be set to send a pulse to a

specified device. Discrete Outputs are high and low outputs used to turn

equipment on and off.

DO modules can be software-configured as latched, toggled, momentary,

or Timed Duration Outputs (TDO). The DO can be configured to either

retain the last value on reset or use a user-specified fail-safe value.

The DO module provides LEDs that light when each output is active.

When a request is made to change the state of a DO, the request is

immediately sent to the DO module. There is no scan time associated with

a DO. Under normal operating conditions, the DO channel registers the

change within 2 milliseconds.

If the DO is in momentary or toggle mode, you can enter a minimum time-

on of 4 milliseconds.

Figure 4-9 displays the field wiring connections to the output circuit of the

DO module.

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-11

Caution The Discrete Output module only operates with non-powered discrete

devices, such as relay coils or solid-state switch inputs. Using the module

with powered devices may cause improper operation or damage.

DO modules draw power for the active circuitry from the backplane, and

are fused for protection against excessive current.

Note: When using the Discrete Output module to drive an inductive load

(such as a relay coil), place a suppression diode across the input terminals

to the load. This protects the module from the reverse Electro-Motive

Force (EMF) spike generated when the inductive load is switched off.

+Vs

CONTROL

EXTERNALLY POWERED

DISCRETE DEVICE +

COM

5 CHAN

DOC0508A

Figure 4-9. Discrete Output Module Field Wiring

Note: All I/O modules are isolated on the field side. Be aware that you can

induce ground loops by tying commons from various modules together.

4.7 Discrete Output Relay Modules

The five-channel DO Relay (DOR) module provides LEDs that light when

each output is active. DOR modules use dual-state latching relays to

provide a set of normally open, dry contacts capable of switching 2 A at

32 Volts dc across the complete operating temperature. You can configure

the module as latched, toggled, momentary, or Timed Duration Outputs

(TDO). The DOR can either retain the last value on reset or use a user-

specified fail-safe value.

Figure 4-10 displays the field wiring connections to the output circuit of

the DO Relay module.

Representative

Internal Circuit Field Wiring

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-12

Note: The Discrete Output Relay module operates only with discrete

devices having their own power source.

When a request is made to change the state of a DOR, the request is

immediately sent to the DOR module. There is no scan time associated

with a DOR. Under normal operating conditions, the DOR channel

registers the change within 12 mSecs. If the DOR is in momentary or

toggle mode, DOR channels register the change within 48 mSecs.

The DOR modules draw power for the active circuitry from the backplane.

Note: On power up or reset, the DO Relay module’s LEDs enter

indeterminate state for a few seconds as the module self-identifies. The

LEDs may flash, stay on, or stay off for a few seconds.

CONTROL

VsEXTERNALLY POWERED

DISCRETE DEVICE +

SELF- POWERED

DISCRETE DEVICE

CH 1

CH 2

CH 3

CH 4

CH 5

-Y

RELA

5 CHAN

DOC0509A

LATCHING RELAY

NOTE: S = SET

R = RESET

Figure 4-10. Discrete Output Relay Module Field Wiring

Note: All I/O modules are isolated on the field side. Be aware that you can

induce ground loops by tying commons from various modules together.

4.8 Pulse Input Modules

The Pulse Input (PI) module provides two channels for measuring either a

low speed or high speed pulse signal. The PI module processes signals

from pulse-generating devices and provides a calculated rate or an

accumulated total over a configured period. Supported functions are slow-

counter input, slow rate input, fast counter input, and fast rate input.

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-13

The PI is most commonly used to interface to relays or open

collector/open drain type solid-state devices. The Pulse Input can be used

to interface to either self-powered or ROC827-powered devices.

The high speed input supports signals up to 12 kHz while the low speed

input is used on signals less than 125 Hz.

You can configure the PI module as either 12 or 24 Volts dc using jumper

J4 on the I/O module (see Figure 4-11). The PI modules can provide

isolated +12 Volt dc or +24 Volt dc field transmitter power on a per-

module basis. For example, one module can provide +12 Volt dc power,

while another module in the same ROC827 can provide +24 Volt dc

power. Refer to Figures 4-12 and 4-13.

The PI module provides LEDs that light when each input is active.

Caution The Pulse Input module only operates with non-powered devices, such as

“dry” relay contacts or isolated solid-state switches. Use of the PI module

with powered devices may cause improper operation or damage.

The PI modules draw power for the active circuitry from the backplane.

Input signals are optically isolated.

Note: Do not connect wiring to both the Low and High speed selections

for a given channel. This results in unpredictable operation of the PI

module.

Figure 4-11. Pulse Input J4 Jumper (Set to +12 V)

+T 12 / 24 V dc

Jumper

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-14

OPEN DRAIN TYPE

OPEN COLLECTOR DEVICE

EXTERNALLY POWERED

-CONTACT-CLOSURE DEVICE

EXTERNALLY POWERED

12KHz PI FILTER &

LEVEL DETECTION

12KHz PI FILTER &

LEVEL DETECTION

DOC0510A

Figure 4-12. Externally Powered Pulse Input Module Field Wiring

12KHz PI FILTER &

LEVEL DETECTION

METER COIL

DOC0511A

COM

CH 2CH 1

2 CHAN

OPEN DRAIN TYPE DEVICE

OPEN COLLECTOR

ROC800 POWERED

COM

Figure 4-13. ROC800-Powered Pulse Input Module Field Wiring

Note: All I/O modules are isolated on the field side. Be aware that you can

induce ground loops by tying commons from various modules together.

4.9 RTD Input Modules

The Resistance Temperature Detector (RTD) module monitors the

temperature signal from an RTD source. The module can accommodate

input from a two-, three-, or four-wire RTD source.

The active element of an RTD probe is a precision, temperature-dependent

resistor made from a platinum alloy. The resistor has a predictable positive

temperature coefficient, meaning its resistance increases with temperature.

Representative

Internal Circuit Field Wiring

Representative

Internal Circuit Field Wiring

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-15

The RTD input module works by supplying a small consistent current to

the RTD probe and measuring the voltage drop across it. Based on the

voltage curve of the RTD, the ROC827 firmware converts the signal to

temperature.

The RTD input module monitors the temperature signal from a resistance

temperature detector (RTD) sensor or probe. A two-channel 16-bit RTD

module is available. The RTD module isolation includes the power supply

connections.

The RTD modules draw power for the active circuitry from lines on the

backplane.

It may be more convenient to perform calibration before connecting the

field wiring. However, if the field wiring between the ROC827 and the

RTD probe is long enough to add a significant resistance, then perform

calibration in a manner that considers this.

4.9.1 Connecting the RTD Wiring

Temperature can be input through the Resistance Temperature Detector

(RTD) probe and circuitry. An RTD temperature probe mounts directly to

the piping using a thermowell. Protect RTD wires either by a metal sheath

or by conduit connected to a liquid-tight conduit fitting. The RTD wires

connect to the four screw terminals designated “RTD” on the RTD

module.

The ROC827 provides terminations for a four-wire 100-ohm platinum

RTD with a DIN 43760 curve. The RTD has an alpha equal to 0.00385 or

0.00392Ω/Ω°C. You can use a two-wire or three-wire RTD probe instead

of a four-wire probe, but they may produce measurement errors due to

signal loss on the wiring.

Wiring between the RTD probe and the ROC827 must be shielded wire,

with the shield grounded only at one end to prevent ground loops. Ground

loops cause RTD input signal errors.

Table 4-1. RTD Signal Routing

Signal Terminal Designation

CH 1 (REF) 1 Constant Current +

CH 1 (+) 2 V+ RTD

CH 1 (–) 3 V– RTD

CH 1 (RET) 4 Constant Current –

Not Connected 5

CH 2 (REF) 6 Constant Current +

CH 2 (+) 7 V+ RTD

CH 2 (–) 8 V– RTD

CH 2 (RET) 9 Constant Current –

Not Connected 10 N/A

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-16

Note: All I/O modules are isolated on the field side. Be aware that you can

induce ground loops by tying commons from various modules together.

Figure 4-14. RTD Sensor Wiring Terminal Connections

Figure 4-14 and Table 4-2 display the connections at the RTD terminals

for the various RTD probes.

Table 4-2. RTD Wiring

Terminal 4-Wire RTD 3-Wire RTD 2-Wire RTD

REF Red Jumper to + Jumper to +

+ Red Red, Jumper to REF Red, Jumper to REF

– White White White, Jumper to RET

RET White White Jumper to –

Note: The wire colors for the RTD being used may differ.

4.10 J and K Type Thermocouple Input Modules

The five-channel J and K Type Thermocouple Input module monitors

either J or K Type Thermocouple (T/C). J and K refer to the type of

material used to make a bimetallic junction: Type J (Iron/Constantan) and

Type K (Chromel/Alumel). These dissimilar junctions in the thermocouple

junction generate different millivolt levels as a function of the heat to

which they are exposed.

The J and K Type Thermocouple Input module measures the voltage of

the thermocouple to which it is connected. The T/C voltage is measured

and a Cold Junction Compensation (CJC) correction factor is applied to

compensate for errors due to any voltage inducted at the wiring terminals

Jumper

4-Wire RTD 3-Wire RTD 2-Wire RTD

Red

Red Red

Jum

Red

Jum

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-17

by the junction between the different metal of the T/C wiring and the T/C

module’s terminal blocks.

Note: The use of dissimilar metals is not supported. It will not provide the

correct results, as CJC is applied at the module level.

Thermocouples are self-powered and require no excitation current. The

thermocouple modules use integrated short-circuit protected isolated

power supplies and completely isolates the field wiring side of the module

from the backplane.

Caution If using the Type J above 750°C (1382°F), abrupt magnetic transformation

causes permanent de-calibration of the T/C wires.

De-calibration De-calibration can occur in thermocouple wires. De-calibration is the

process of unintentionally altering the makeup of the thermocouple,

usually caused by the diffusion of atmospheric particles into the metal

at the extremes of the operating temperature range. Impurities and

chemicals can cause de-calibration from the insulation diffusing into

the thermocouple wire. If operating at high temperatures, check the

specification of the probe insulation. It is advised to use

thermocouples with insulated junctions to protect against oxidation

and contamination.

Thermocouples use thin wire (typically 32 AWG) to minimize thermal

shunting and increase response times. Wire size used in the thermocouple

depends upon the application. Typically, when longer life is required for

the higher temperatures, select the larger size wires. When sensitivity is

the prime concern, use smaller size wiring. Thin wire causes the

thermocouple to have a high resistance that can cause errors due to the

input impedance of the measuring instrument. If thermocouples with thin

leads or long cables are required, keep the thermocouple leads short and

use a thermocouple extension wire to run between the thermocouple and

measuring instrument.

The thermocouple wires directly to the module’s removable terminal

block. No special terminal or isothermal block is required.

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-18

J OR K THERMOCOUPLE

UNGROUNDED SHEATH

DOC0512B

Figure 4-15. Type J and K Thermocouple Wiring

Be sure to use the correct type of thermocouple wire to connect the

thermocouple to the ROC827. Minimize connections and make sure

connections are tight. If you use any dissimilar metals (such as copper

wire) to connect a thermocouple to the ROC827, you can create the

junction of dissimilar metals that can generate millivolt signals and

increase reading errors.

Ensure any plugs, sockets, or terminal blocks used to connect the

extension wire are made from the same metals as the thermocouples and

observe correct polarity.

The thermocouple probe must have sufficient length to minimize the effect

of conduction of heat from the hot end of the thermocouple. Unless there

is insufficient immersion, readings will be low. It is suggested the

thermocouple be immersed for a minimum distance equivalent to four

times the outside diameter of a protection tube or well.

Use only ungrounded thermocouple constructions. Grounded

thermocouples are susceptible to the creation of ground loops. In turn,

ground loops can cause interaction between thermocouple channels on the

thermocouple module.

Note: Use thermocouples as individual sensing devices. All modules are

isolated on the field side. Be aware that you can induce ground loops by

tying module-to-module commons together.

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-19

Noise Susceptibility Millivolt signals are very small and are very susceptible to noise.

Noise from stray electrical and magnetic fields can generate voltage

signals higher than the millivolt levels generated from a

thermocouple. The T/C modules can reject common mode noise

(signals that are the same on both wires), but rejection is not perfect,

so minimize noise where possible.

Take care to properly shield thermocouple wiring from noise by separating

the thermocouple wiring runs from signals that are switching loads and

AC signals. Route wires away from noisy areas and twist the two insulated

leads of the thermocouple cable together to help ensure both wires pickup

the same noise. When operating in an extremely noisy environment, use a

shielded extension cable.

TypeJus.dsf

–

Figure 4-16. Type J Thermocouple Shielded

Wiring – United States Color Coding

TypeKus.dsf

–

Figure 4-17. Type K Thermocouple Shielded

Wiring – United States Color Coding

United States color-coding for the Type J Thermocouple shielded wiring is

black sheathing, the positive lead is white, and the negative lead is red.

United States color-coding for the Type K Thermocouple shielded wiring

is yellow sheathing, the positive lead is yellow, and the negative lead is

red.

Caution Shielded wiring is recommended. Ground shields only on one end,

preferably at the end device unless you have an excellent ground system

installed at the ROC800-series controller. Do not tie the thermocouple

module to ground.

Note: It is highly recommended that you use shielded wiring.

Sheathed thermocouple probes are available with one of three junction

types: grounded, ungrounded, or exposed.

unground.dsf

Figure 4-18. Ungrounded –

Sheathed

ground.dsf

Figure 4-19. Grounded

exposed.dsf

Figure 4-20. Exposed,

Ungrounded – Unsheathed

In an ungrounded probe, the thermocouple junction is detached from the

probe wall. Response time slows down from the grounded style, but the

ungrounded probe offers electrical isolation of 1.5 M ½ at 500 Volts dc in

all diameters. The wiring may or may not be sheathed.

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-20

Note: Only ungrounded probes are supported. It is highly recommended

that you use sheathed probes.

Use an ungrounded junction for measurements in corrosive environments

where it is desirable to have the thermocouple electronically isolated from

and shielded by the sheath. The welded wire thermocouple is physically

insulated from the thermocouple sheath by MgO powder (soft).

At the tip of a grounded junction probe, the thermocouple wires

physically attach to the inside of the probe wall. This results in good heat

transfer from the outside, through the probe wall to the thermocouple

junction. Grounded wiring is not supported.

The thermocouple in the exposed junction protrudes out of the tip of the

sheath and is exposed to the surrounding environment. This type offers the

best response time, but is limited in use to non-corrosive and non-

pressurized applications. Exposed junction thermocouples are not

supported.

Note: Avoid subjecting the thermocouple connections and measurement

instrument to sudden changes in temperature.

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-21

4.11 Related Specification Sheets

Refer to the following specification sheets (available at

www.EmersonProcess.com/flow) for additional and most-current

information on each of the I/O modules.

Table 4-3. I/O Module Specification Sheets

Name Form Number Part Number

AI and AO Modules (ROC800-Series) 6.3:IOM1 D301163X012

DI and PI Modules (ROC800-Series) 6.3:IOM2 D301175X012

DO and DOR Modules (ROC800-Series) 6.3:IOM3 D301181X012

RTD and T/C Modules (ROC800-Series) 6.3:IOM4 D301182X012

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-22

ROC827 Instruction Manual

Issued Mar-06 Communications 5-1

Chapter 5 – Communications

This section describes the built-in communications and the optional

communication modules used with the ROC827.

In This Chapter

5.1 Communications Ports and Modules Overview.......................................5-1

5.2 Installing Communication Modules..........................................................5-3

5.3 Removing a Communications Module.....................................................5-4

5.4 Wiring Communications Modules............................................................5-5

5.5 Local Operator Interface (LOI).................................................................5-5

5.5.1 Using the LOI.................................................................................5-7

5.6 Ethernet Communications .......................................................................5-7

5.7 EIA-232 (RS-232) Serial Communications..............................................5-9

5.8 EIA-422/485 (RS-422/485) Serial Communications Module.................5-10

5.8.1 EIA-422/485 (RS-422/485) Jumpers & Termination Resistors....5-11

5.9 Dial-up Modem Communications Module..............................................5-12

5.10 Multi-Variable Sensor (MVS) Interface Modules ...................................5-14

5.11 HART Interface Module .........................................................................5-16

5.12 Related Specification Sheets.................................................................5-20

5.1 Communications Ports and Modules Overview

The built-in communications and the optional communication modules

provide communications between the ROC827 and a host system or

external devices.

The ROC827 allows up to six communication ports. Three communication

ports are built-in on the CPU. You can add up to three additional ports

with communication modules. Table 5-1 displays the types of

communications available for the ROC827.

Table 5-1. Built-in Communications and Optional Communication Modules

Communications Built-in on CPU Optional Module

EIA-232 (RS-232D) Local Operator Interface (LOI) Local Port

Ethernet (use with DS800 Configuration Software) Comm1

EIA-232 (RS-232C) Serial Communications Comm2 Comm3 to Comm5

EIA-422/485 (RS-422/485) Serial Communications Comm3 to Comm5

Modem Communications Comm3 to Comm5

MVS Sensor Interface Comm3 to Comm5

The communication modules consist of a communications module (card),

a communications port, wiring terminal block, LEDs, and connectors to

the backplane. The ROC827 unit can hold up to three communication

modules in the first three module slots. Refer to Figure 5-1.

ROC827 Instruction Manual

Issued Mar-06 Communications 5-2

Figure 5-1. Communication Ports

Table 5-2. Communication LED Indicator Definitions

Signals Action

CTS Clear To Send indicates the modem is ready to send.

CD Data Carrier Detect (DCD) indicates a valid carrier signal tone detected.

DSR Data Set Ready for ring indicator communication signal.

DTR Data Terminal Ready to answer an incoming call. When off, a connection disconnects.

RTS Ready To Send indicates ready to transmit.

RX Receive Data (RD) signal is being received.

TX Transmit Data (TD) signal is being transmitted.

Each communications module has surge protection in accordance with the

CE certification EN 61000. Each communications module is completely

isolated from other modules and the backplane, including power and

signal isolation, with the exception of the EIA-232 (RS-232) module. The

field interface has been designed to protect the electronics in the module.

Filtering is provided on each module to reduce communication errors.

LOI (Local Port)

-232

(

RS-232D

)

Built-in Ethernet (Comm1)

Built-in EIA-232

(RS-232) (Comm2)

Optional Comm 3 or Comm 4

(

Slot #2

)

Optional Comm 3 to Comm 5

(Slot #3)

Optional Comm 3

(

Slot #1

)

ROC827 Instruction Manual

Issued Mar-06 Communications 5-3

5.2 Installing Communication Modules

All communication modules install into the ROC827 in the same way.

You can install or remove communication modules while the ROC827 is

powered up (hot-swappable), you can install modules directly into unused

module slots 1, 2, or 3 (hot-pluggable), and modules are self-identifying in

the software. All modules are self-resetting after a fault clears.

Note: The dial-up modem module is not hot-swappable or hot-pluggable.

When you install a dial-up modem module, you must remove power from

the ROC827.

Figure 5-2. Example RS-485 Communications Module

Caution When working on units located in a hazardous area (where explosive

gases may be present), make sure the area is in a non-hazardous state

before performing procedures. Performing these procedures in a

hazardous area could result in personal injury or property damage.

Note: You can install communications modules only in slots 1, 2, or 3 of

the ROC827. Refer to Figure 5-1.

1. Remove the wire channel cover.

Note: Leaving the wire channel cover in play can prevent the module

from correctly connecting to the socket on the backplane.

2. Perform one of the following:

ROC827 Instruction Manual

Issued Mar-06 Communications 5-4

 If there is a module currently in the slot, unscrew the captive

screws and remove that module (refer to “Removing a

Communications Module”).

 If the slot is currently empty, remove the module cover.

3. Insert the new module through the module slot on the front of the

ROC827 housing. Make sure the label on the front of the module is

facing right side up. Gently slide the module in place until it contacts

properly with the connectors on the backplane.

Note: If the module stops and will not go any further, do not force the

module. Remove the module and see if the pins are bent. If so, gently

straighten the pins and re-insert the module. The back of the module

must connect fully with the connectors on the backplane.

4. Gently press the module into its mating connectors on the backplane

until the connectors firmly seat.

5. Install the retaining captive screws to secure the module.

6. Wire the module (refer to “Wiring Communications Modules”).

Note: All modules have removable terminal blocks for convenient

wiring and servicing. Twisted-pair cable is recommended for I/O

signal wiring. The removable terminal blocks accept 12 AWG or

smaller wire.

7. For dial-up modem communications, connect the cable to the RJ-11

connector on the communications module.

Note: If you are installing a modem module, it is recommended that

you install a surge protector between the RJ-11 jack and the outside

line.

8. Replace the wire channel cover.

9. Connect to ROCLINK 800 software and login. The modules are self-

identifying after re-connecting to ROCLINK 800 software.

5.3 Removing a Communications Module

To remove a communications module:

1. Remove the wire channel cover.

2. Unscrew the two captive screws holding the module in place.

3. Gently pull the module’s lip out and remove the module from the slot.

You may need to gently wiggle the module.

4. Install a new module or install the module cover.

5. Screw the two captive screws to hold the module in place.

ROC827 Instruction Manual

Issued Mar-06 Communications 5-5

6. Replace the wire channel cover.

5.4 Wiring Communications Modules

Signal wiring connections to the communications are made through the

communications port removable terminal bock connectors and through RJ-

11 and RJ-45 connectors. All modules have removable terminal blocks for

convenient wiring and servicing. The terminal blocks can accommodate a

wide range of wire gauges (12 AWG or smaller).

Caution Failure to exercise proper electrostatic discharge precautions, such as

wearing a grounded wrist strap may reset the processor or damage

electronic components, resulting in interrupted operations.

To connect the wire to the removable block compression terminals:

1. Bare the end (¼ inch maximum) of the wire.

2. Insert the bared end into the clamp beneath the termination screw.

3. Tighten the screw.

The ROC827 should have a minimum of bare wire exposed to prevent

short circuits. Allow some slack when making connections to prevent

strain.

Note: All modules have removable terminal blocks for convenient wiring

and servicing. Twisted-pair cable is recommended for I/O signal wiring.

The removable terminal blocks accept 12 AWG or smaller wire.

5.5 Local Operator Interface (LOI)

The Local Operator Interface (LOI) local port provides direct

communications between the ROC827 and the serial port of an operator

interface device, such as an IBM compatible computer. The interface

allows you to access the ROC827 with a direct connection using

ROCLINK 800 software to configure and transfer stored data.

The LOI uses the Local Port in ROCLINK 800 software.

The LOI terminal (RJ-45) on the CPU provides wiring access to a built-in

EIA-232 (RS-232) serial interface, which is capable of 57.6K baud

operation. The RJ-45 connector pin uses the data terminal equipment

(DTE) in the IEEE standard.

The LOI port supports ROC Plus and Modbus protocol communications.

The LOI also supports the log-on security feature of the ROC827 if you

have enabled the Security on LOI in the ROCLINK 800 software.

Table 5-3 shows the signal routing of the CPU connections. Figure 5-3

shows the RJ-45 pin out.

ROC827 Instruction Manual

Issued Mar-06 Communications 5-6

Table 5-3. Built-in LOI EIA-232 Signal Routing

Signal LOI Function RJ-45 Pins

on ROC827 Description

DTR Data Terminal

Ready 3 Originated by the ROC827 Data Terminal Equipment (DTE) to instruct

the Data Communication Equipment (DCE) to setup a connection.

DTE is running and ready to communicate.

GND Ground

(Common) 4 Reference ground between a DTE and a DCE and has a value 0 Volts

dc.

RX Receive 5 Data received by the DTE.

TX Transmit 6 Data sent by the DTE.

RTS Request to Send 8 Originated by the DTE to initiate transmission by the DCE.

Figure 5-3. RJ-45 Pin Out

The LOI terminal requires the installation of a D-Sub 9 pin (F) to RJ-45

modular converter between the ROC827 and personal computer (PC).

Refer to Table 5-4.

Table 5-4. RJ-45 to EIA-232 (RS-232) Null-modem Cable Signal Routing

EIA-232

(RS-232)

DTE

ROC800-

Series

RJ-45 Pins

on ROC800-

Series

4 – 1

1 – 2

6 DTR 3

5 GND 4

3 TX 5

2 RX 6

7 – 7

8 RTS 8

Table 5-5. Using Cable Warehouse 0378-2 D-Sub to Modular Converter 9-Pin to RJ-45 Black

Pin Wire

Color

RJ-45 Pins

on ROC800-

Series

1 Blue 4

2 Orange 1

3 Black 6

ROC827 Instruction Manual

Issued Mar-06 Communications 5-7

Pin Wire

Color

RJ-45 Pins

on ROC800-

Series

4 Red 5

5 Green 3

6 Yellow 2

7 Brown 7

8 Gray 8

5.5.1 Using the LOI

1. Plug the LOI cable into the LOI RJ-45 connector of the ROC827.

2. Connect the LOI cable to the D-Sub 9 pin (F) to RJ-45 modular

converter.

3. Plug the modular converter into the COM Port of the personal

computer.

4. Launch ROCLINK 800 software.

5. Click the Direct Connect icon.

6. Configure communications for the other built-in and modular

communications, I/O modules, AGA meter parameters, and other

configuration parameters.

5.6 Ethernet Communications

The Ethernet communications port in the ROC827 allows TCP/IP protocol

communications using the IEEE 802.3 10Base-T standard. One

application of this communications port is to download programs from

DS800 Development Suite Configuration Software.

The Ethernet communications port uses a 10BASE-T Ethernet interface

with an RJ-45 connector. Each Ethernet-equipped unit is called a station

and operates independently of all other stations on the network without a

central controller. All attached stations connect to a shared media system.

Signals are broadcast over the medium to every attached station. To send

an Ethernet packet, a station listens to the medium (Carrier Sense) and

when the medium is idle, the station transmits the data. Each station has an

equal chance to transmit (Multiple Access).

Access to the shared medium is determined by the Medium Access

Control (MAC) mechanism embedded in each station interface. The MAC

mechanism is based on Carrier Sense Multiple Access with Collision

Detection (CSMA/CD). If two stations begin to transmit a packet at the

same instant, the stations stop transmitting (Collision Detection).

Transmission is rescheduled at a random time interval to avoid the

collision.

ROC827 Instruction Manual

Issued Mar-06 Communications 5-8

You can link Ethernet networks together to form extended networks using

bridges and routers.

Table 5-6. Ethernet Signal LEDs

Signal Function

RX Lit when currently receiving.

TX Lit when currently transmitting.

COL Lit when Ethernet Packet Collision detected.

LNK Lit when Ethernet has linked.

Use a rugged industrial temperature HUB when connecting Ethernet

wiring in an environment that requires it.

The IEEE 802.3 10BASE-T standard requires that 10BASE-T transceivers

be able to transmit over a link using voice grade twisted-pair telephone

wiring that meets EIA/TIA Category four wire specifications. Generally,

links up to 100 meters (328 feet) long can be achieved for unshielded

twisted-pair cable.

For each connector or patch panel in the link, subtract 12 meters (39.4

feet) from the 100-meter limit. This allows for links of up to 88 meters

(288 feet) using standard 24 AWG UTP (Unshielded Twisted-Pair) wire

and two patch panels within the link. Higher quality, low attenuation

cables may be required when using links greater than 88 meters.

The maximum insertion loss allowed for a 10BASE-T link is 11.5 dB at

all frequencies between 5.0 and 10.0 MHz. This includes the attenuation

of the cables, connectors, patch panels, and reflection losses due to

impedance mismatches to the link segment.

Intersymbol interference and reflections can cause jitter in the bit cell

timing, resulting in data errors. A 10BASE-T link must not generate more

than 5.0 nanoseconds of jitter. If your cable meets the impedance

requirements for a 10BASE-T link, jitter should not be a concern.

The maximum propagation delay of a 10BASE-T link segment must not

exceed 1000 nanoseconds.

Crosstalk is caused by signal coupling between the different cable pairs

contained within a multi-pair cable bundle. 10BASE-T transceivers are

designed so that you do not need to be concerned about cable crosstalk,

provided the cable meets all other requirements.

Noise can be caused by crosstalk of externally induced impulses. Impulse

noise may cause data errors if the impulses occur at very specific times

during data transmission. Generally, do not be concerned about noise. If

you suspect noise related data errors, it may be necessary to either reroute

the cable or eliminate the source of the impulse noise.

Multi-pair, PVC 24 AWG telephone cables have an attenuation of

approximately 8 to 10 dB/100 m at 200°C (392°F). The attenuation of

PVC insulted cable varies significantly with temperature. At temperatures

ROC827 Instruction Manual

Issued Mar-06 Communications 5-9

greater than 400°C (752°F), use plenum rated cables to ensure that cable

attenuation remains within specification.

When connecting two twisted-pair Medium Attachment Units (MAUs) or

repeaters together over a segment, wire the transmit data pins of one eight-

pin connector to the receive data pins of the other connector, and vice

versa. There are two methods for accomplishing 10BASE-T crossover

wiring:

 Using special cable.

 Wiring the 10BASE-T crossover inside the hub.

For a single segment connecting only two devices, provide the signal

crossover by building a special crossover cable, wire the transmit data pins

of one eight-pin connector to the receive data pins of the other connector,

and vice versa. Refer to Figure 5-4.

Signal Signal

Pin 1 TD+ Pin 1 TD+

Pin 2 TD– Pin 2 TD–

Pin 3 RD+ Pin 3 RD+

Pin 6 RD– Pin 6 RD–

Figure 5-4. 10BASE-T Crossover Cable

5.7 EIA-232 (RS-232) Serial Communications

The built-in EIA-232 (RS-232), the LOI, and the communication modules

meet all EIA-232 (RS-232) specifications for single-ended, asynchronous

data transmission over distances of up to 15 meters (50 feet). EIA-232

(RS-232) communication provides transmit, receive, and modem control

signals. The LOI port also meets EIA-232D (RS-232D) specifications.

The EIA-232 (RS-232) communications have the following

communication port designations in ROCLINK 800.

 LOI – Local Port EIA-232 (RS-232D). Refer to Section 5.5, “Local

Operator Interface.”.

 Built-in – Comm2 EIA-232 (RS-232C).

 Module – Comm3 to Comm5 EIA-232 (RS-232C).

EIA-232 (RS-232) uses point-to-point asynchronous serial

communications and is commonly used to provide the physical interface

for connecting serial devices, such as gas chromatographs and radios to

the ROC800-Series. The EIA-232 (RS-232) communication provides

essential hand-shaking lines required for radio communications, such as

DTR and RTS.

ROC827 Instruction Manual

Issued Mar-06 Communications 5-10

The EIA-232 (RS-232) communications includes LED indicators that

display the status of the Receive (RX), Transmit (TX), Data Terminal

Ready (DTR), and Ready To Send (RTS) control lines.

Table 5-7 defines the built-in EIA-232 (RS-232) terminals at the Comm2

port and their function signals.

Table 5-7. Built-in EIA-232 (RS-232) Signal Routing – Comm2

Signal LED Function Terminal

RX Lit when Comm2 is currently receiving. 1

TX Lit when Comm2 is currently transmitting. 2

RTS Lit when Comm2 ready to send is not active. 3

DTR Lit when Comm2 data terminal ready is active. 4

GND Common. 5

The EIA-232 (RS-232) communications module provides for EIA-232

(RS-232C) signals on the Comm3, Comm4, or Comm5 port depending on

where the module is installed. Refer to Table 5-8.

Table 5-8. EIA-232 (RS-232) Communication Module Signal Routing – Comm3, Comm4, and Comm5

Signal LED Function Terminal

RX Lit when module (Comm3, Comm4, or Comm5) is

currently receiving. 1

TX Lit when module (Comm3, Comm4, or Comm5) is

currently transmitting. 2

RTS Lit when module (Comm3, Comm4, or Comm5) is

ready to send is not active. 3

DTR Lit when module (Comm3, Comm4, or Comm5)

data terminal ready is active. 4

GND Common. 5

5.8 EIA-422/485 (RS-422/485) Serial Communications Module

EIA-422/485 (RS-422/485) communication modules meet all EIA-

422/485 (RS-422/485) specifications for differential, asynchronous serial

communication transmissions of data over distances of up to 1220 meters

(4000 feet). EIA-485 (RS-485) communications are commonly used to

multi-drop units on a serial network over long distances using inexpensive

twisted-pair wiring.

EIA-422 (RS-422) drivers are designed for party-line applications where

one driver is connected to, and transmits on, a bus with up to ten receivers.

EIA-422 (RS-422) allows long distance point-to-point communications

and the drivers are designed for true multi-point applications with up to 32

drivers and 32 receivers on a single bus.

The default values for the EIA-422/485 (RS-422/485) communications are

19200 Baud Rate, 8 Data Bits, 1 Stop Bit, and No Parity. The maximum

rate is 57.6K bps.

ROC827 Instruction Manual

Issued Mar-06 Communications 5-11

EIA-422/485 (RS-422/485) communication modules include LED

indicators that display the status of receive and transmit activity. Refer to

Tables 5-9 and 5-10.

Table 5-9. EIA-422 (RS-422) Signal Routing – Comm3, Comm4, and Comm5

Signal RS-422 Function Terminal

A RX + Lit when module (Comm3, Comm4, or Comm5) is currently receiving. 1

B RX – None. 2

Y TX + Lit when module (Comm3, Comm4, or Comm5) is currently transmitting. 3

Z TX – None. 4

COM Common Ground. 5

Table 5-10. EIA-485 (RS-485) Signal Routing – Comm3, Comm4, and Comm5

Signal RS-485 Function Terminal

A RX / TX + Lit when module (Comm3, Comm4, or Comm5) is currently receiving. 1

B RX / TX – Lit when module (Comm3, Comm4, or Comm5) is currently transmitting. 2

Y No Connect None. 3

Z No Connect None. 4

COM Common Ground. 5

Note: The EIA-422/485 (RS-422/485) modules are isolated on the field

side. Be aware that you can induce ground loops by tying commons

together.

EIA-422/485 (RS-422/485) communications provides EIA-422/485 (RS-

422/485) signals on the Comm3, Comm4, or Comm5 port, depending on

where the module is installed. Wiring should be twisted-pair cable, one

pair for transmitting, and one pair for receiving. The EIA-422 (RS-422)

module uses four wires and the EIA-485 (RS-485) uses two wires for

connectivity.

5.8.1 EIA-422/485 (RS-422/485) Jumpers & Termination Resistors

Four jumpers—J3, J4, J5, and J6—are located on the EIA-422/485 (RS-

422/485) communications module. These jumpers determine the mode in

which the module runs (RS-422 or RS-485) and if the module is

terminated.

Terminations are required on the two EIA-422/485 (RS-422/485)

communication modules located at the extremities of the circuit. That is to

say, the two outside modules require terminations in order to complete the

communications circuit.

ROC827 Instruction Manual

Issued Mar-06 Communications 5-12

Figure 5-5. EIA-422/485 (RS-422/485) J4 Jumper

Table 5-11. EIA-422 (RS-422) Module

Terminated Not Terminated

Jumper TER Out Half Full TER Out Half Full

J3 x x

J4 x x

J5 x x

J6 x x

Table 5-12. EIA-485 (RS-485) Module

Terminated Not Terminated

Jumper TER OUT Half Full TER OUT Half Full

J3 x x

J4 x x

J5 x x

J6 x x

5.9 Dial-up Modem Communications Module

The dial-up modem module interfaces to a Public-Switched Telephone

Network (PSTN) line, and requires a telephone line connection. The

module provides a telephone interface on the host port that is capable of

both answering and originating telephone calls. The module also provides

electronics that conserve power when the phone line is not in use.

ROC827 Instruction Manual

Issued Mar-06 Communications 5-13

Note: When installing a dial-up modem module, you must remove power

from the ROC827.

The dial-up modem provides communications with speeds up to 14.4K

bps with V.42 bis and V.42, MNP2-4 and MNP10 error correction, and is

FCC Part 68 approved for use with PSTNs. The FCC label on the module

provides the FCC registration number and the ringer equivalent. The

module supports data compression, error correction, and nonvolatile RAM

for permanent storage of the modem configuration.

Using asynchronous operation, the module interfaces to two-wire, full-

duplex telephone lines. It interfaces to a PSTN through an RJ-11 jack.

You control the modem using industry-standard AT command software. A

40-character command line is provided for the AT command set, which is

compatible with EIA document TR302.2/88-08006.

The dial-up modem automatically hangs up after a user-configured period

of communications inactivity and provides automated dial-up alarm

reporting capabilities. Refer to the ROCLINK 800 Configuration Software

User Manual (Form A6121).

Table 5-13. RJ-11 Field Connections

Signal Pin

Tip 3

Ring 4

LED indicators on the module show the status of the Receive (RX),

Transmit (TX), Ring (RI), and Carrier Detect (CD) control lines.

Table 5-14 displays connector signals and their functions.

Table 5-14. Modem Signal Routing – Comm3, Comm4, and Comm5

Signal Function Terminal

RX Lit when module (Comm3, Comm4, or Comm5) is currently receiving. 1

TX Lit when module (Comm3, Comm4, or Comm5) is currently transmitting (Tip). 3

RI Lit when module (Comm3, Comm4, or Comm5) on ring (Ring). 7

CD Lit when module (Comm3, Comm4, or Comm5) on carrier detect. 9

Notes:

 If you are installing a modem module, it is recommended that you

install a surge protector between the RJ-11 jack and the outside line.

 The dial-up modem is not hot-swappable or hot-pluggable. When

installing a dial-up modem module, you must remove power from the

ROC827.

ROC827 Instruction Manual

Issued Mar-06 Communications 5-14

5.10 Multi-Variable Sensor (MVS) Interface Modules

The Multi-Variable Sensor (MVS) provides differential pressure, static

pressure, and temperature inputs to the ROC827 unit for orifice flow

calculation.

The MVS module consists of interface electronics that provide the

communications link between the ROC827 and the MVS. The interface

electronics controls communications with the sensor module, provides

scaling of process variables, aids calibration, stores operating parameters,

performs protocol conversion, and responds to requests from the ROC827.

The ROC827 handles up to two MVS interface modules. Each MVS

module provides the communications interface and the isolated, short-

circuit current-limited power required to connect up to six MVS sensors.

The MVS modules create six points automatically for each of the six

possible MVS channels. The points include 1 through 6 and if you have a

second MVS module installed, points 7 through 12 are available. Points

are assigned based on which module is in the first slot. For example, if an

MVS module is in slot three, it automatically assigns the points 1 through

6. If you then install an MVS module into slot one, the points are re-

assigned so that slot one holds points 1 through 6 and slot three holds

points 7 through 12.

The ROC827 allows six MVS devices to be connected on its

communications bus in a multi-drop connection scheme. You must set the

address of each MVS prior to final wiring of multiple MVS devices. For

proper operation of multiple MVS devices, each MVS device must have a

unique address. None of the addresses can be 240. For details on MVS

configuration, refer to the ROCLINK 800 Configuration Software User

Manual (Form A6121).

Once you set a unique address for each MVS, connect the MVS units in a

multi-drop arrangement. The only requirement for wiring multi-drop

devices is that all like terminals be tied together. This means all the “A”

terminals on the devices are electrically connected to the ROC827’s “A”

terminal and so on. To do this, daisy-chain wire each remote MVS.

Terminations are required on the two MVS modules located at the

extremities of the circuit. That is to say, the two outside modules require

terminations in order to complete the communications circuit. The MVS

termination jumper is located at J4 on the module. Refer to Table 5-15 and

Figure 5-6.

Table 5-15. MVS Termination

Terminated Not Terminated

Jumper TER OUT TER OUT

J4 x x

ROC827 Instruction Manual

Issued Mar-06 Communications 5-15

Figure 5-6. MVS Jumper J4 (Shown Not Terminated)

Four wires run from the MVS module terminal block and connect to the

sensor. The wires should be a minimum size of 22 AWG and a maximum

length of 1220 m (4000 ft).

Note: Insulated, shielded, twisted-pair wiring is required when using MVS

signal lines.

Two of the terminal blocks provide power and the other two terminals

provide a communication path. Table 5-16 identifies the terminals.

Table 5-16. MVS Signal Routing – Comm3, Comm4, and Comm5

Label MVS LED Terminal

A RX / TX + Lit green when receiving 1

B RX / TX – N/A 2

None No Connect Lit green when transmitting 3

+ Sensor Power N/A 4

– Common N/A 5

Notes:

 Pay close attention to the connections; do not reverse the power

wires. Make these connections only after removing power from the

ROC827. Double-check connections for the proper orientation before

applying power. If the connections are reversed and power is applied,

you will damage both the MVS module and the ROC800-Series

processor board.

ROC827 Instruction Manual

Issued Mar-06 Communications 5-16

 MVS modules are isolated on the field side. Be aware that you can

induce ground loops by tying commons together.

5.11 HART Interface Module

The HART® Interface module allows a ROC827 to communicate with

HART devices using the Highway Addressable Remote Transducer

(HART) protocol. The HART module can receive signals from HART

transmitters or receive and transmit signals from HART transducers. LEDs

provide a visual indication of the status of each HART channel. Refer to

Figure 4-21.

Note: The ROC827 currently supports the HART module only when

installed in slot 1, 2, or 3 of the ROC827 base unit.

The HART module has four analog channels. When configured as an

input, you can configure the channel for use in point-to-point or multi-

drop mode and typically connects to some type of transmitter, such as for

a temperature reading. When configured as an output, you can configure

the channel for use in point-to-point mode only. The output supports a

Digital Valve Controller (DVC).

Point-to-Point Mode In point-to-point mode, digital communications are superimposed

using the Frequency Shift Keying (FSK) technique on the 4 to 20

milliAmp analog signal (which can still measure the process variable).

This mode allows communications with one HART device per analog

channel.

Multi-drop Mode In multi-drop mode, you can connect up to five HART devices (in

parallel) to each analog input channel. As with the point-to-point

mode, digital communications are superimposed on the 4 to 20

milliAmp signal. However, the analog signal is used only to measure

the current consumed by the multi-drop loop. When all four analog

inputs are in the multi-drop mode, the ROC827 can support a

maximum of 20 HART devices. The number of devices per channel is

limited by the static current draw of the devices.

A ROC827 equipped with a HART module is considered to be a HART

Host (primary master) interface with a Class 1 Conformance classification.

Most Universal and some Common Practice commands are supported. For

a list of the commands, refer to the HART Communication Module

specification sheet (6.3:HART). The supported commands conform to

HART Universal Command Specification Revision 5.1 and Common

Practice Command Specification Revision 7, (HCF SPEC 127 and 151).

Refer to www.hartcomm.org for more information on the specifications.

The HART module polls the channels simultaneously. If more than one

device is connected to a channel in a multi-drop configuration, the module

polls one device per channel at a time. The HART protocol allows one

ROC827 Instruction Manual

Issued Mar-06 Communications 5-17

second per poll for each device, so with five devices per channel the

maximum poll time for the channel would be five seconds.

Note: The ROC827 does not support HART devices configured in Burst

mode (in which the device sends information without a prior request). If

you have a HART device configured in Burst mode, use a hand-held Field

Communicator to turn off Burst mode before you connect the device to

the ROC827.

The HART module provides “loop source” power (+T) and four channels

(1+ through 4+) for communications. The +T power is current-limited.

When powered by the ROC827, terminal +T is connected in parallel to the

positive (+) terminal on all of the HART devices, regardless of the channel

to which they are connected. Channel 1+ is wired to the negative (–)

terminal of a single HART device, or in parallel to the negative terminals

of the devices. Likewise, channel 2+ is wired to the negative (–) terminal

of a single HART device, or in parallel to the negative terminals of a

second group of HART devices.

When powered by an external device, the positive (+) terminal from the

power source is connected in parallel to the positive (+) terminal on all of

the HART devices, regardless of the channel to which they are connected.

Channel 1+ on the HART module is wired to the positive (+) terminal of

the HART device. The power source negative (–) terminal is connected to

the channel’s COM terminal and to the negative (–) terminal of a single

HART device, or in parallel to the negative terminals of the HART

devices.

Switches on the module board allow channel-by-channel selection as an

Analog Input (IN) or Analog Output (OUT). The switches for Channel 2

and 4 are located on the front of the module, while the switches for

channel 1 and 3 are located on the back of the module. Use a pin to move

the switches to the desired state (refer to Figures 5-8 and 5-9).

Note: Always set the IN or OUT switches before wiring the switch or

applying power.

ROC827 Instruction Manual

Issued Mar-06 Communications 5-18

Figure 5-7. HART Interface Module Field Wiring

Figure 5-8. HART Channels 1 and 3 (back side of board)

CH1 I/O Switch

CH3 I/O Switch

Representative

Internal Circuit Field Wiring

ROC827 Instruction Manual

Issued Mar-06 Communications 5-19

Figure 5-9. HART Channels 2 and 4 (front side of board)

CH4 I/O Switch

CH2 I/O Switch

ROC827 Instruction Manual

Issued Mar-06 Communications 5-20

5.12 Related Specification Sheets

Refer to the following specification sheets (available at

www.EmersonProcess.com/flow) for additional and most-current

information on each of the communications modules.

Table 5-17. Related Documentation

Name Form Number Part Number

Communications Modules (ROC800-Series) 6.3:COM D301171X012

MVS205 Multi-Variable Sensor 2.5:MVS205 D301079X012

MVS205R Multi-Variable Sensor (ATEX Version) 2.5:MVSCE D301204X012

MVS205R Multi-Variable Sensor (SAA Version) 2.5:MVSSAA D301213X012

HART® Communication Module (ROC800-Series) 6.3:HART D301203X012

ROC827 Instruction Manual

Issued Mar-06 Troubleshooting 6-1

Chapter 6 – Troubleshooting

This chapter provides generalized guidelines for troubleshooting the

ROC827. Perform the procedures in this chapter before you remove

power from the ROC827 for any reason, after you restore power to the

ROC827, and if you disassemble the ROC827.

Use the following tools for troubleshooting:

 IBM-compatible personal computer.

 ROCLINK 800 Configuration software (version 1.60 or greater)

 Flat-head (size 1/10 inch) and Philips (size 0) screwdrivers.

In This Chapter

6.1 Guidelines................................................................................................6-1

6.2 Checklists ................................................................................................6-2

6.2.1 Serial Communications ................................................................6-2

6.2.2 I/O Point .......................................................................................6-2

6.2.3 Software .......................................................................................6-3

6.2.4 Powering Up.................................................................................6-3

6.2.5 MVS Module.................................................................................6-3

6.3 Procedures ..............................................................................................6-4

6.3.1 Preserving Configuration and Log Data.......................................6-4

6.3.2 Restarting the ROC827................................................................6-4

6.3.3 Troubleshooting Analog Input Modules........................................6-5

6.3.4 Troubleshooting Analog Output Modules.....................................6-7

6.3.5 Troubleshooting Discrete Input Modules......................................6-7

6.3.6 Troubleshooting Discrete Output Modules...................................6-8

6.3.7 Troubleshooting Discrete Output Relay Modules ........................6-8

6.3.8 Troubleshooting Pulse Input Modules..........................................6-9

6.3.9 Troubleshooting RTD Input Modules ...........................................6-9

6.3.10 Troubleshooting J & K Type Thermocouple Input Modules.......6-10

6.1 Guidelines

When you are attempting to diagnose a problem with the ROC827:

 Remember to write down what steps you have taken.

 Note the order in which you remove components.

 Note the orientation of the components before you alter or remove

them.

 Save the configuration and log data. Refer to “Preserving

Configuration and Log Data” in this chapter.

 Read and follow all Cautions in this manual.

When you are done troubleshooting, perform the restart procedure as

described in “Restarting the ROC827” in this chapter.

ROC827 Instruction Manual

Issued Mar-06 Troubleshooting 6-2

6.2 Checklists

If the LEDs do not display:

 By default, LEDs on the communication modules and I/O modules

enter Sleep mode after five minutes.

 To turn the LEDs on, press the LED button located on the CPU for

one second.

Note: Using the ROCKLINK 800 software, you can disable this feature

so that the LEDs always remain on.

6.2.1 Serial Communications

If you are experiencing troubles with a serial communications connection

(LOI, EIA-232, EIA-422, or EIA-485):

 Check to make sure power is applied to the ROC827 unit. Check the

ON/OFF jumper, the wiring connections at CHG+ and CHG–, and the

wiring at the power source.

 Check the wiring to the termination block or connector. Refer to

Chapter 5, Communications.

 Check the communication port settings using ROCLINK 800

Configuration software. Refer to ROCLINK 800 Configuration

Software User Manual (Form A6121).

6.2.2 I/O Point

If you are experiencing troubles with an I/O point (Analog Input, Analog

Output, Discrete Input, Discrete Output, Pulse Input, RTD Input, or

Thermocouple Input):

 Check (using ROCLINK 800 software) to see how the channel is

configured.

 If the configuration looks correct, then follow the procedure for

troubleshooting that type of I/O (refer to Chapter 6, sections 3 through

10).

 If a module does not function correctly, determine if the problem is

with the field device or the module.

 Check a module suspected of being faulty for a short circuit between

its input or output terminals. If a terminal not directly connected to

ground reads 0 (zero) when measured with an ohmmeter, the module

is defective and must be replaced.

Note: Return faulty modules to your local sales representative for

repair or replacement.

ROC827 Instruction Manual

Issued Mar-06 Troubleshooting 6-3

6.2.3 Software

If you are experiencing problems with the ROC827 that appear to be

software-related, try resetting the ROC827.

Note: During a reset and subsequent re-start, the ROC827 loses

configuration and log data. Before you attempt any type of reset, back up

your configuration and log data. Refer to “Preserving Configuration and

Log Data” in this chapter.

 Use a Warm Start to restart without losing configuration or log data.

To perform a Warm Start, open ROCLINK 800 software, connect to

the ROC827 unit and select ROC > Flags. Refer to ROCLINK 800

Configuration Software User Manual (Form A6121).

 Use a Cold Start to restart without a portion of the configuration, log

data, or programming that may be the trouble. To perform a Cold

Start, open ROCLINK 800 software, connect to the ROC827 and

select ROC > Flags. Refer to ROCLINK 800 Configuration Software

User Manual (Form A6121).

 While applying power, firmly press the RESET button on the CPU for

three seconds to restore the unit to factory defaults without connecting

to ROCLINK 800 software.

Note: If none of these methods solve the problem, contact your local sales

representative.

6.2.4 Powering Up

If you are experiencing trouble with powering up the ROC827:

 Check the wiring connections at terminations on the Power Input

module and the wiring at the power source.

 Check the internal battery for voltage. Refer to Chapter 3, Power

Connections.

 Check the external batteries, if applicable, for voltage.

Note: If none of these methods solve the problem, contact your local sales

representative.

6.2.5 MVS Module

If you are experiencing trouble with the MVS module:

 If more than one MVS is connected to the ROC827, use the

ROCKLINK 800 Configuration software to ensure that each MVS has

a unique address.

ROC827 Instruction Manual

Issued Mar-06 Troubleshooting 6-4

 Reset the MVS module back to factory defaults. Refer to the

ROCLINK 800 Configuration Software User Manual (Form A6121).

Note: If you believe an MVS module is damaged or faulty, contact your

sales representative for repair or replacement.

6.3 Procedures

Use the following procedures to resolve various issues with the I/O

modules.

6.3.1 Preserving Configuration and Log Data

Perform this backup procedure before you remove power from the

ROC827 for repairs, troubleshooting, or upgrades, This procedure

preserves the current ROC827 configuration and log data held in

SDRAM.

Caution When working on units located in a hazardous area (where explosive

gases may be present), make sure the area is in a non-hazardous state

before performing procedures. Performing these procedures in a

hazardous area could result in personal injury or property damage.

To avoid circuit damage when working inside the unit, use appropriate

electrostatic discharge precautions, such as wearing a grounded wrist

strap.

1. Launch ROCLINK 800 software.

2. Select ROC menu > Flags > Save Configuration. This saves all

configuration settings, including the current states of the ROC827

Flags and calibration values. Click OK.

3. Select ROC menu > Collect Data. Select all check boxes and click

OK. This saves event logs, alarm logs, report data, hourly logs, and

daily logs (you can specify your own file name and path if desired).

4. Select File > Save Configuration. The Save As dialog box appears.

5. Type the desired File name of the backup file.

6. Select the Directory where you desire to store the configuration file.

7. Click Save.

6.3.2 Restarting the ROC827

After removing power to the ROC827 and installing components,

perform the following steps to start your ROC827 and reconfigure your

data.

ROC827 Instruction Manual

Issued Mar-06 Troubleshooting 6-5

Caution Ensure all input devices, output devices, and processes remain in a safe

state upon restoring power. An unsafe state could result in property

damage.

When working on units located in a hazardous area (where explosive

gases may be present), make sure the area is in a non-hazardous state

before performing procedures. Performing these procedures in a

hazardous area could result in personal injury or property damage.

Note: The procedure assumes you are using ROCLINK 800 software.

1. Reconnect power to the ROC827 unit.

2. Wait 30 seconds.

3. Launch ROCLINK 800 software, log in, and connect to the ROC827.

4. Verify that the configuration is correct. If major portions or the entire

configuration needs to be reloaded, perform the remaining steps.

5. Select File > Download.

6. Select the backup configuration file (with file extension *.800) from

the Open dialog box.

7. Select the portions of the configuration you desire to download

(restore).

8. Click Download to restore the configuration.

9. Configure other required parameters.

6.3.3 Troubleshooting Analog Input Modules

Before you can determine whether an Analog Input module is operating

properly, you must first know its configuration. Table 6-1 shows typical

configuration values for an Analog Input:

Table 6-1. Analog Input Module Typical Configuration Values

Parameter Value Value Read

Adjusted A/D 0 % 819 1 volt dc across the + and the COM terminal by a multimeter

Adjusted A/D 100 % 4095 5 Volts dc across the + and the COM terminal by a multimeter

Low Reading EU 0.0000 EU value with 1 Volt dc

High Reading EU 100.0 EU value with 5 Volts dc

Value xxxxx Value read by AI module

Equipment Required:

 Multimeter

 PC running ROCLINK 800 software

ROC827 Instruction Manual

Issued Mar-06 Troubleshooting 6-6

Caution Failure to exercise proper electrostatic discharge precautions, such as

wearing a grounded wrist strap may reset the processor or damage

electronic components, resulting in interrupted operations.

1. Connect a multimeter across the scaling resistor connected to the +

and COM terminals of the module and set the multimeter to measure

voltage.

2. Connect to ROCLINK 800 software.

3. Select Configuration > I/O > AI Points.

4. Select the correct Analog Input Point Number.

5. Verify the following readings:

 When the Value is –25% of span as configured in Table 6-1, it is

an indication of no current flow (0 mA), which can result from

open field wiring or a faulty field device. The multimeter should

show 0 (zero) Volts dc.

 When the Value is in excess of 100% of span as configured in

Table 6-1, it is an indication of maximum current flow, which can

result from shorted field wiring or a faulty field device. The

multimeter should show 5 Volts dc.

 When the Value is between the Low Reading EU and the High

Reading EU, verify the accuracy of the reading by measuring the

voltage across the terminals with the multimeter.

6. Convert this reading to the Value value:

Value = [((Vmultimeter – 1) ÷ 4) * Span] + Low Reading EU

where Span = High Reading EU – Low Reading EU.

Note: This calculated value should be within one-tenth of one percent

of the Filter value measured by the ROC827.

7. Verify the accuracy by reading the loop current with a multimeter,

setting the multimeter to measure current in mA, and connecting it in

series with current loop. Be sure to take into account that input values

can change rapidly, which can cause a greater error between the

measured value and the calculated value.

8. Calculate the Value from the mAmp reading of the multimeter:

Value = [((mAmpmultimeter* Rscaling resistor – 1) * 4) * Span] + Low

Reading EU

where Span = High Reading EU – Low Reading EU and Rscaling

resistor should be 250 ohms (factory installed scaling resistor value).

Note: If the calculated value and the measured value are the same, the

AI module is operating correctly.

ROC827 Instruction Manual

Issued Mar-06 Troubleshooting 6-7

9. Remove the test equipment.

6.3.4 Troubleshooting Analog Output Modules

Equipment Required:

 Multimeter.

 PC running ROCLINK 800 software.

Caution Failure to exercise proper electrostatic discharge precautions, such as

wearing a grounded wrist strap may reset the processor or damage

electronic components, resulting in interrupted operations.

To calibrate the module:

1. Connect a multimeter between the + and – channel terminals of the

module and set the multimeter to measure current in milliamps.

2. Connect to ROCLINK 800 software.

3. Select Configuration > I/O > AO Points.

4. Select the correct Analog Output Point Number.

5. Select Scanning Manual and click Apply.

6. Set the output to the High Reading EU value.

7. Verify a 20 mA reading on the multimeter.

8. Set the output to the Low Reading EU value and click Apply.

9. Verify a 4 mA reading on the multimeter.

10. Calibrate the Low Reading EU value by increasing or decreasing the

Adjusted D/A 0% units value.

11. Select Scanning Enabled and click Apply.

12. Remove the test equipment, and reconnect the field device.

13. If possible, verify the correct operation of the AO module by setting

the High Reading EU and Low Reading EU values as before

(Scanning Disabled) and observing the field device.

6.3.5 Troubleshooting Discrete Input Modules

Equipment Required:

 Jumper wire

 PC running ROCLINK 800 software

Caution Failure to exercise proper electrostatic discharge precautions, such as

wearing a grounded wrist strap may reset the processor or damage

electronic components, resulting in interrupted operations.

1. Disconnect the field wiring at the DI module terminations.

ROC827 Instruction Manual

Issued Mar-06 Troubleshooting 6-8

2. Connect to ROCLINK 800 software.

3. Select Configuration > I/O > DI Points.

4. Select the correct Discrete Input Point Number.

5. Place a jumper across a channel input terminal (1-8) and COM.

6. The Status should change to On. With no jumper on the channel

terminal and COM, the Status should change to Off.

7. Remove the test equipment, and reconnect the field device.

6.3.6 Troubleshooting Discrete Output Modules

Equipment Required:

 Multimeter

 PC running ROCLINK 800 software

Caution Failure to exercise proper electrostatic discharge precautions, such as

wearing a grounded wrist strap may reset the processor or damage

electronic components, resulting in interrupted operations.

1. Verify the load current requirement does not exceed the current limit

value of the module.

2. Verify the module is wired correctly.

3. Remove all wiring from the DO module.

4. Connect the multimeter set up to measure ohms to the channel that

you are testing.

5. Measure the resistance with the DO Status OFF. It should be over 2

megohms.

6. Measure the resistance with the DO Status ON. It should be

approximately 1 ohm.

6.3.7 Troubleshooting Discrete Output Relay Modules

Equipment Required:

 Multimeter

 PC running ROCLINK 800 software

Caution Failure to exercise proper electrostatic discharge precautions, such as

wearing a grounded wrist strap may reset the processor or damage

electronic components, resulting in interrupted operations.

1. Connect the multimeter set up to measure ohms to the channel that

you are testing.

2. Set the Status to On and click Apply.

ROC827 Instruction Manual

Issued Mar-06 Troubleshooting 6-9

3. Measure the resistance across terminals + and –. A reading of 0 (zero)

ohms should be obtained. No continuity should be indicated.

4. Measure the resistance across the terminals + and –. The reading

should indicate an open circuit.

6.3.8 Troubleshooting Pulse Input Modules

Equipment Required:

 Pulse Generator

 Voltage Generator

 Frequency Counter

 Jumper wire

 PC running ROCLINK 800 software

Caution Failure to exercise proper electrostatic discharge precautions, such as

wearing a grounded wrist strap may reset the processor or damage

electronic components, resulting in interrupted operations.

To verify high-speed operation:

1. Disconnect the field wiring at the PI module terminations.

2. Connect to ROCLINK 800 software.

3. Select Configuration > I/O > PI Points.

4. Select the correct Pulse Input Point Number.

5. Connect a pulse generator having sufficient output to drive the

module to terminals L+ or H+ and COM. The pulse generator must

synthesize a square wave signal of 50% for every cycle.

6. Connect a frequency counter across terminals L+ or H+ and COM.

7. Set the pulse generator to a value equal to, or less than 10 KHz.

8. Set the frequency counter to count pulses.

9. Verify, using ROCLINK 800 software, that the count read by the

counter and the ROC827 are the same.

10. Remove the test equipment, and reconnect the field device.

6.3.9 Troubleshooting RTD Input Modules

The RTD module is similar in operation to an Analog Input module and

uses the same troubleshooting and repair procedures.

Equipment Required:

 Multimeter

 PC running ROCLINK 800 software

ROC827 Instruction Manual

Issued Mar-06 Troubleshooting 6-10

Caution Failure to exercise proper electrostatic discharge precautions, such as

wearing a grounded wrist strap may reset the processor or damage

electronic components, resulting in interrupted operations.

1. Disconnect the field wiring at the RTD module terminations.

2. Connect to the ROCLINK 800 software.

3. Select Configuration > I/O > RTD Point.

4. Select the correct RTD Point Number.

5. If any of the input wires are broken or not connected, the ROCLINK

800 software indicates the Raw A/D Input value is either at minimum

(less than 47974) or maximum (greater than or equal to 61958) as

follows:

 An open at terminal + gives a maximum reading.

 An open at terminal – gives a minimum reading.

 An open at terminal RET gives a minimum reading.

To verify the operation of the RTD module:

6. Connect to the ROCLINK 800 software.

7. Select Configuration > I/O > RTD Point.

8. Disconnect the RTD and connect a jumper between terminals – and

RET of the RTD module.

9. Connect either an accurate resistor or decade resistance box with a

value to give a low end reading across terminals + and –.

Note: Use the temperature-to-resistance conversion chart to determine

the resistance value required for the type of RTD being used.

10. Verify that the Raw A/D Input value changed and reflects the

Adjusted A/D 0% value.

11. Change the resistance to reflect a high temperature as determined by

the temperature-to-resistance conversion chart.

12. Verify that the Raw A/D Input value changed and reflects the

Adjusted A/D 100% value.

13. Remove the test equipment, and reconnect the field device.

6.3.10 Troubleshooting J and K Type Thermocouple Input Modules

Many digital multimeters can generate and measure thermocouple (T/C)

signals. Check your multimeter’s product documentation to see if it

supports thermocouples and how to correctly use the feature if so

equipped. You may require an optional T/C adaptor to use the multimeter.

To test a thermocouple, do not parallel the voltage meter on a

thermocouple that is connected to a ROC827, as it will distort the signal.

ROC827 Instruction Manual

Issued Mar-06 Troubleshooting 6-11

Do not try to verify a thermocouple that is connected and actively being

monitored by a ROC827 by measuring the voltage at the ROC827

terminal blocks.

It is suggested that you independently verify the process temperature, by

using a certified thermometer in an adjacent thermowell, and then

compare it to what the ROC827 is reading.

Equipment Required:

 Multimeter

 PC running ROCLINK 800 software

Caution Failure to exercise proper electrostatic discharge precautions, such as

wearing a grounded wrist strap may reset the processor or damage

electronic components, resulting in interrupted operations.

To test the thermocouple module:

1. Disconnect the thermocouple from the thermocouple module.

2. Generate the correct J or K signal using a multimeter and connect the

wiring from the multimeter to the T/C module in the ROC827.

3. Verify the ROC is reading the generated temperature form the

multimeter.

4. Remove the test equipment, and reconnect the field device.

To test the thermocouple:

1. Disconnect the thermocouple from the ROC827.

2. Connect the thermocouple directly to the multimeter and verify the

reading is correct by comparing it to a certified temperature

measurement device connected to the process temperature the T/C is

measuring.

3. Remove the test equipment, and reconnect the field device.

Unintentional thermocouple junctions cause many measurement errors.

Remember that any junction of two different metals will cause a junction.

To increase the length of the leads from the thermocouple, use the correct

type of thermocouple extension wire. Any connector must be made of the

correct thermocouple material and correct polarity must be observed.

If the reading is off:

1. The type J or K thermocouples are selected on a per channel basis on

the thermocouple module. Verify each channel on the ROC827 and

make sure it is set for the type of thermocouple that you are using.

2. Ensure any plugs, sockets, or terminal blocks used to connect the

extension wire are made from the same metals as the thermocouples

and correct polarity is observed.

3. Verify all connections are tight.

ROC827 Instruction Manual

Issued Mar-06 Troubleshooting 6-12

4. Verify the thermocouples have the correct construction (ungrounded)

and are not grounded by other means.

5. Verify you are using the correct thermocouple wire all the way from

the thermocouple to the ROC827 with minimal connections.

6. Verify the wiring run is adequately protected from noise.

7. Test the thermocouple reading from the thermocouple to a meter, and

then generate a signal into the ROC827 as described previously.

8. Finally, connect a thermocouple of the same type directly to the

ROC827. If it reads correctly, the problem is likely to be in the wiring

to the field or may be related to a ground loop.

ROC827 Instruction Manual

Issued Mar-06 Calibration 7-1

Chapter 7 – Calibration

This section provides information about calibration procedures for the

Analog Input (AI) modules, HART Input module, RTD Input module,

and Multi-Variable Sensor (MVS) Input module. For the full calibration

procedure, refer to the ROCLINK 800 Configuration Software User

Manual (Form A6121).

In This Chapter

7.1 Calibration................................................................................................7-1

7.2 Preparing for Calibration..........................................................................7-1

7.1 Calibration

Use ROCLINK 800 Configuration software to perform initial calibration

or re-calibration of the inputs on the AI, HART, RTD, and MVS

modules. Re-calibration would occur, for example, after a change in an

orifice plate in the meter run handled by the ROC827. Calibration can be

performed on sensor inputs from either orifice meter runs or turbine meter

runs.

The AI and MVS calibration routines support five-point calibration, with

the three mid-points calibrated in any order. The The low-end or zero

reading is calibrated first, followed by the high-end or full-scale reading.

The three mid-points can be calibrated next, if desired. The RTD

calibration routine supports three-point calibrations.

The HART calibration routine supports two-point calibration. The low-

end or zero reading is calibrated first, followed by the high-end or full-

scale reading.

The diagnostic System Analog Inputs are not designed to be calibrated.

7.2 Preparing for Calibration

Before calibrating the inputs from a sensor, HART device, or other

device, you should prepare the ROC827 unit.

1. Verify the inputs are correctly wired. For information on wiring the

inputs, refer to Chapter 4, Input/Output Modules.

2. If calibrating a pressure sensor input, be sure to remove the sensor

from the flow as directed in the calibration procedure in the

ROCLINK 800 Configuration Software User Manual (Form A6121).

3. Verify that any external monitoring devices (such as multimeters) are

connected to the ROC827 unit, if they are required for the calibration.

ROC827 Instruction Manual

Issued Mar-06 Calibration 7-2

ROC827 Instruction Manual

Issued Mar-06 Glossary A-1

Appendix A – Glossary

Note: This is a generalized glossary of terms. Not all the terms may

necessarily correspond to the particular device or software described in

this manual. For that reason, the term “ROC” is used to identify all

varieties of Remote Operations Controllers (including ROC800-Series,

ROC300-Series, FloBoss™ 100-Series, FloBoss 300-Series, FloBoss 500-

Series, and FloBoss 407 units).

A/D Analog to Digital signal conversion.

ABS Acrylonitrile Butadiene Styrene.

ADC Analog to Digital Converter. Used to convert analog inputs (AI) to a format the flow

computer can use.

AGA American Gas Association. A professional organization that oversees the AGA3 (orifice),

AGA5 (heating value), AGA7 (turbine), AGA8 (compressibility), and AGA11 (ultrasonic)

gas flow calculation standards. See http://www.aga.org.

AWG American Wire Gauge.

AI Analog Input.

AO Analog Output.

Analog Analog data is represented by a continuous variable, such as an electrical current signal.

AP Absolute Pressure.

API American Petroleum Institute. See http://www.api.org.

Area A user-defined grouping of database entities.

ASCII American (National) Standard Code for Information Interchange.

Attribute A parameter that provides information about an aspect of a database point. For example,

the alarm attribute is an attribute that uniquely identifies the configured value of an alarm.

BMV Base Multiplier Value, used in AGA7 (turbine) calculations.

BPS Bits Per Second, associated with baud rate.

BTU British Thermal Unit, a measure of heat energy.

Built-in I/O I/O channels that are fabricated into the ROC and do not require a separate option. Also

called “on-board” I/O.

C1D2 Class 1, Division 2 hazardous area

CMOS Complementary Metal Oxide Semiconductor, a type of microprocessor used in a ROC.

Coil Digital output, a bit to be cleared or set.

COL Ethernet Packet Collision.

COM Communications port on a personal computer (PC).

COMM Communications port on a ROC used for host communications. .

Note: On FloBoss 500-Series and FloBoss 407s, COMM1 is built-in for RS-232 serial

communications.

ROC827 Instruction Manual

Issued Mar-06 Glossary A-2

C (continued)

Comm Module Module that plugs into a ROC to provide a channel for communications via a specified

communications protocol, such as EIA-422 (RS-422) or HART.

CF Compare Flag; stores the Signal Value Discrete (SVD).

Configuration Refers either to the process of setting up the software for a given system or the result of

performing this process. The configuration activity includes editing the database, building

schematic displays and reports, and defining user calculations. Typically, the software

setup of a device that can often be defined and changed. Can also mean the hardware

assembly scheme.

Configuration

Tree In ROCLINK 800, the graphical display that appears when a configuration file opens. It is

a hierarchical branching (“tree-style”) method for navigating within the configuration

screens.

CPU Central Processing Unit.

CRC Cyclical Redundancy Check error checking.

Crosstalk The amount of signal that crosses over between the receive and transmit pairs, and

signal attenuation, which is the amount of signal loss encountered on the Ethernet

segment.

CSA Canadian Standards Association. See http://www.csa.ca.

CSMA/CD Carrier Sense Multiple Access with Collision Detection.

CTS Clear to Send modem communications signal.

D/A Digital to Analog signal conversion.

DB Database.

dB Decibel. A unit for expressing the ratio of the magnitudes of two electric signals on a

logarithmic scale.

DCD Data Carrier Detect modem communications signal. In addition, Discrete Control

Device – A discrete control device energizes a set of discrete outputs for a given setpoint

and matches the desired result against a set of discrete inputs (DI).

DCE Data Communication Equipment.

Deadband A value that is an inactive zone above the low limits and below the high limits. The

purpose of the deadband is to prevent a value (such as an alarm) from being set and

cleared continuously when the input value is oscillating around the specified limit. This

also prevents the logs or data storage location from being over-filled with data.

Device Directory In ROCLINK 800, the graphical display that allows navigation through the PC Comm

Ports and ROC Comm Ports setup screen.

DI Discrete Input.

Discrete Input or output that is non-continuous, typically representing two levels (such as on/off).

DMM Digital multimeter.

DO Discrete Output.

Download The process of sending data, a file, or a program from a PC to a ROC.

DP Differential Pressure.

DSR Data Set Ready modem communications signal.

DTE Data Terminal Equipment.

DTR Data Terminal Ready modem communications signal.

Duty Cycle Proportion of time during a cycle that a device is activated. A short duty cycle conserves

power for I/O channels, radios, and so on.

ROC827 Instruction Manual

Issued Mar-06 Glossary A-3

D (continued)

DVM Digital voltmeter.

DVS Dual-Variable Sensor. A device that provides static and differential pressure inputs to a

ROC.

EDS Electronic Static Discharge.

EEPROM Electrically Erasable Programmable Read-Only Memory, a form of permanent memory

on a ROC.

EFM Electronic Flow Metering or Measurement.

EIA-232

(RS-232) Serial Communications Protocol using three or more signal lines, intended for short

distances. Concerning RS232D and RS232C, the letters C or D refer to the physical

connector type. D specifies the RJ-11 connector where a C specifies a DB25 type

connector.

EIA-422

(RS-422) Serial Communications Protocol using four signal lines.

EIA-485

(RS-485) Serial Communications Protocol requiring only two signal lines. Can allow up to 32

devices to be connected together in a daisy-chained fashion.

EMF Electro-Motive Force.

EMI Electro-Magnetic Interference.

ESD Electro-Static Discharge.

EU Engineering Units. Units of measure, such as MCF/DAY.

FCC Federal Communications Commission. See http://www.fcc.gov.

Firmware Internal software that is factory-loaded into a form of ROM. In a ROC, the firmware

supplies the software used for gathering input data, converting raw input data values,

storing values, and providing control signals.

FlashPAC

module ROM and RAM module for a ROC300-Series unit that contains the operating system,

applications firmware, and communications protocol.

Flash ROM A type of read-only memory that can be electrically re-programmed. It is a form of

permanent memory (requires no backup power). Also called Flash memory.

FloBoss A microprocess-based device that provides flow calculations, remote monitoring, and

remote control. A FloBoss is a type of ROC.

FM Factory Mutual.

Force Write an ON/OFF, True/False, or 1/0 value to a coil.

FPV Compressibility Factor.

FSK Frequency Shift Keypad.

FST Function Sequence Table, a type of user-written program in a high-level language

Ft Foot or feet.

GFA Ground Fault Analysis.

GND Electrical ground, such as used by the ROC’s power supply.

GP Gauge Pressure.

ROC827 Instruction Manual

Issued Mar-06 Glossary A-4

HART Highway Addressable Remote Transducer.

Holding

Hw Differential pressure.

Hz Hertz.

I, J

IC Integrated Circuit. Also, Industry Canada (more recently known as Measurement

Canada), an organization that grants custody transfer approvals on certain ROC units.

ID Identification.

IEC Industrial Electrical Code or International Electrotechnical Commission. See

http://www.iec.ch.

IEEE Institute of Electrical and Electronic Engineers. A professional organization that, in

conjunction with the International Standards Organization (ISO), establishes and

maintains the Open System Interconnection (OSI) reference model and an international

standard for the organization of local area networks (LANs). Refer to http://www.ieee.org.

IMV Integral Multiplier Value, used in AGA3 (orifice) calculations.

Input Digital input, a bit to be read.

Input Register Input numeric value to be read.

Local Port Also LOI; the serial EIA-232 (RS-232) port on the ROC through which local

communications are established, typically for configuration software running on a PC.

I/O Input/Output.

I/O Module Module that plugs into an I/O slot on a ROC to provide an I/O channel.

IRQ Interrupt Request. Hardware address oriented.

ISO International Standards Organization. See http://www.iso.ch.

IV Integral Value.

KB Kilobytes.

KHz KiloHertz.

LCD Liquid Crystal Display.

LDP Local Display Panel, a display-only device that plugs into ROC300-Series units (via a

parallel interface cable) used to access information stored in the ROC.

LED Light-Emitting Diode.

Logical Number The point number the ROC and ROC Plus protocols use for I/O point types are based on

a physical input or output with a terminal location; the point numbers for all other point

types are “logical” and are simply numbered in sequence.

LNK Ethernet has linked.

LOI Local Operator Interface (or Local Port). Refers to the serial EAI-232 (RS-232) port on

the ROC through which local communications are established, typically for configuration

software running on a PC.

LPM Lightning Protection Module; a device that provides lightning and power surge protection

for ROCs.

LRC Longitudinal Redundancy Checking error checking.

ROC827 Instruction Manual

Issued Mar-06 Glossary A-5

m Meter.

mA Milliamp(s); one thousandth of an ampere.

MAC Address Media Access Control Address; a hardware address that uniquely identifies each node of

a network.

Manual mode For a ROC, indicates that the I/O scanning has been disabled.

MAU Medium Attachment Unit.

MCU Master Controller Unit.

Modbus A popular device communications protocol developed by Gould-Modicon.

MPU Micro-Processor Unit.

mm Millimeter.

MMBTU Million British Thermal Units.

msec Millisecond, or 0.001 second.

MVS Multi-Variable Sensor. A device that provides differential pressure, static pressure, and

temperature inputs to a ROC for orifice flow calculations.

mV Millivolts, or 0.001 volt.

mW Milliwatts, or 0.001 watt.

NEC National Electrical Code.

NEMA National Electrical Manufacturer’s Association. See http://www.nema.org.

OH Off-Hook modem communications signal.

Off-line Accomplished while the target device is not connected (by a communications link). For

example, “off-line configuration” refers to configuring an electronic file that is later loaded

into a ROC.

Ohms Units of electrical resistance.

On-line Accomplished while connected (by a communications link) to the target device. For

example, “on-line configuration” refers to configuring a ROC800-Series unit while

connected to it, so that you can view the current parameter values and immediately load

new values.

Opcode Type of message protocol the ROC uses to communicate with the configuration software,

as well as host computers with ROC driver software.

Operator

Interface Also LOI or Local Port; the serial EIA-232 (RS-232) port on the ROC through which local

communications are established, typically for configuration software running on a PC.

Orifice meter A meter that records the flow rate of gas through a pipeline. The flow rate is calculated

from the pressure differential created by the fluid passing through an orifice of a particular

size and other parameters.

P, Q

Parameter A property of a point that typically can be configured or set. For example, the Point Tag

ID is a parameter of an Analog Input point. Parameters are normally edited by using

configuration software running on a PC.

PC Personal Computer.

Pf Flowing pressure.

ROC827 Instruction Manual

Issued Mar-06 Glossary A-6

P, Q (continued)

P/DP Pressure/Differential Pressure.

PI Pulse Input.

PID Proportional, Integral, and Derivative control feedback action.

PIT Periodic Timer Interrupt.

PLC Programmable Logic Controller.

Point Software-oriented term for an I/O channel or some other function, such as a flow

calculation. Points are defined by a collection of parameters.

Point Number The physical location of an I/O point (module slot and channel) as installed in the ROC.

Point Type Defines the database point to be a specific type of point available to the system. The

point type determines the basic functions of a point.

Preset Number value previously determined for a register.

PRI Primary PID control loop.

Protocol A set of standards that enables communication or file transfers between two computers.

Protocol parameters include baud rate, parity, data bits, stop bit, and the type of duplex.

PSTN Public Switched Telephone Network.

PT Process Temperature.

PTT Push-to-Talk signal.

Pulse Transient variation of a signal whose value is normally constant.

Pulse Interface

module A module that provides line pressure, auxiliary pressure, and pulse counts to a ROC.

PV Process Variable or Process Value.

Rack A row of slots on a ROC into which I/O modules can be plugged. Racks are given a letter

to physically identify the location of an I/O channel (such as “A” for the first rack). Built-in

I/O channels are assigned a rack identifier of “A” while diagnostic I/O channels are

considered to be in “E” rack.

RAM Random Access Memory. RAM is used to store history, data, most user programs, and

additional configuration data.

RBX Report-by-exception. RBX always refers to Spontaneous RBX in which the ROC contacts

the host to report an alarm condition.

RR Results Register; stores the Signal Value Analog (SVA).

RFI Radio Frequency Interference.

RI Ring Indicator modem communications signal.

ROC Remote Operations Controller microprocessor-based unit that provides remote

monitoring and control.

ROCLINK 800 Microsoft® Windows®-based software used to configure functionality in ROC units.

ROM Read-only memory. Typically used to store firmware. Flash memory.

Rotary Meter A positive displacement meter used to measure flow rate, also known as a Roots meter.

RTC Real-Time Clock.

RTD Resistance Temperature Detector.

RTS Ready to Send modem communications signal.

RTU Remote Terminal Unit.

RTV Room Temperature Vulcanizing, typically a sealant or caulk such as silicon rubber.

ROC827 Instruction Manual

Issued Mar-06 Glossary A-7

R (continued)

RS-232 Serial Communications Protocol using three or more signal lines, intended for short

distances. Also referred to as the EIA-232 standard.

RS-422 Serial Communications Protocol using four signal lines. Also referred to as the EIA-422

standard.

RS-485 Serial Communications Protocol requiring only two signal lines. Can allow up to 32

devices to be connected together in a daisy-chained fashion. Also referred to as the EIA-

485 standard.

RX or RXD Received Data communications signal.

SAMA Scientific Apparatus Maker’s Association.

Script An uncompiled text file (such as keystrokes for a macro) that a program interprets in

order to perform certain functions. Typically, the end user can easily create or edit scripts

to customize the software.

Soft Points A type of ROC point with generic parameters that can be configured to hold data as

desired by the user.

SP Setpoint, or Static Pressure.

SPI Slow Pulse Input.

SPK Speaker.

SRAM Static Random Access Memory. Stores data as long as power is applied; typically backed

up by a lithium battery or supercapacitor.

SRBX Spontaneous Report-By-Exception. SRBX always refers to Spontaneous RBX in which

the ROC contacts the host to report an alarm condition.

SVA Signal Value Analog. Stored in the Results Register, it is the analog value that is passed

between functions in an FST.

SVD Signal Value Discrete. Stored in the Compare Flag, it is the discrete value that is passed

down the sequence of functions in an FST.

System

Variables Configured parameters that describe the ROC; set using ROCLINK software.

T/C Thermocouple Input.

TCP/IP Transmission Control Protocol/Internet Protocol.

TDI Time Duration Input.

TDO Time Duration Output.

Tf Flowing temperature.

TLP Type (of point), Logical (or point) number, and Parameter number.

TX or TXD Transmitted Data communications signal.

Turbine meter A device used to measure flow rate and other parameters.

Upload Send data, a file, or a program from the ROC to a PC or other host.

V-Z

V Volts.

ROC827 Instruction Manual

Issued Mar-06 Glossary A-8

ROC827 Instruction Manual

Issued Mar-06 Index I-1

Index

+12 V dc

Analog Input .................................................... 4-6

Pulse Input ....................................................4-13

+24 V dc

Analog Input .................................................... 4-6

Pulse Input ....................................................4-13

+T......................................................................... 4-6

12 Volt dc

Power Input module ........................................ 3-1

24 V dc

Power Input module ........................................ 3-3

Acrylonitrile Butadiene Styrene (ABS)................. 1-2

Addressing Module Slots................................... 1-10

Alarming

SRBX/RBX .................................................... 1-16

Analog Inputs....................................................... 4-6

+12 and +24 V dc............................................ 4-6

System............................................................. 1-7

Troubleshooting............................................... 6-5

Analog Outputs.................................................... 4-8

Troubleshooting............................................... 6-7

AT Command..................................................... 5-13

Attaching an EXP............................................... 2-11

Automatic Self Tests.......................................... 1-13

AUX Terminal ...................................................... 3-2

AUX+ and AUX–....................................3-2, 3-3, 3-4

LEDs................................................................3-3

Auxiliary

Wiring .............................................................. 3-4

Auxiliary Output ................................................... 3-4

Auxiliary Output Fuse

Installing .......................................................... 3-5

Removing ........................................................ 3-5

AUXSW Terminal................................................... 3-2

AUXSW+ and AUXSW– ...................................3-2, 3-6

Backplane.......................................................... 2-10

Backplane, hardware........................................... 1-2

BAT Terminal....................................................... 3-2

BAT+ and BAT–................................................... 3-2

Batteries

Replacing Internal ......................................... 3-25

Wiring External ..............................................3-23

Battery

Backup.............................................................1-6

High ...............................................................1-13

Low ................................................................1-13

Storage..........................................................3-20

Burst Mode.........................................................5-17

Calibration............................................................7-1

Central Processing Unit

See CPU........................................................2-13

Central Processing Unit (CPU)............................1-3

CHG+ and CHG–.................................................3-2

Clock....................................................................1-6

Cold Junction Compensation (CJC) ..................4-16

Comm1 through Comm5 .....................................5-1

Communications

Built-in..............................................................5-1

Dial-up modem ..............................................5-12

EIA-232 (RS-232) module ...............................5-9

EIA-422/485 (RS-422/485) modules .............5-10

Ethernet...........................................................5-7

HART Interface module.................................5-16

Installing modules............................................5-3

Local Port ........................................................5-5

Modules ...........................................................5-1

Port Locations..................................................5-1

Removing a module.........................................5-4

Wiring...............................................................5-5

Communications modules

Specifications ................................................5-20

Configuration, Tuning ........................................3-11

CPU ...................................................................2-18

Connector Locations......................................2-15

Description.......................................................1-5

Installing ........................................................2-16

Removing ......................................................2-16

Detaching an EXP..............................................2-12

Determining Power Consumption........................3-7

Diagnostic

Inputs...............................................................1-7

Dial-up modem

Communications module...............................5-12

LEDs..............................................................5-13

Wiring.............................................................5-13

DIN.......................................................................2-7

Direct Connect .....................................................5-7

Discrete Inputs.....................................................4-9

LEDs................................................................4-9

Troubleshooting...............................................6-7

ROC827 Instruction Manual

Issued Mar-06 Index I-2

Discrete Output Relay

LEDs..............................................................4-11

Troubleshooting............................................... 6-8

Discrete Outputs................................................4-10

LEDs..............................................................4-10

Relay ............................................................. 4-11

Troubleshooting............................................... 6-8

Dry Relay Contacts.............................................. 4-9

DS800 Development Suite software...........1-16, 5-7

Duty Cycle ...........................................................3-8

Analog Input ..................................................3-12

Analog Output ...............................................3-13

Discrete Input ................................................ 3-14

Discrete Output .............................................3-15

Discrete Output Relay ...................................3-16

MVS............................................................... 3-18

Pulse Input ....................................................3-17

RTD ...............................................................3-19

Thermocouple ............................................... 3-19

EIA-232 (RS-232) Communications ....................5-9

Built-in Comm2................................................ 5-9

LEDs................................................................5-9

Local Port ........................................................ 5-5

Module Comm3 to Comm5 ............................. 5-9

EIA-422/485 (RS-422/485) Communications

Jumpers and Termination Resistors .............5-11

LEDs..............................................................5-11

modules......................................................... 5-10

Selecting 422 or 485 Mode ........................... 5-11

Termination ...................................................5-11

Enclosure............................................................. 2-2

End Caps............................................................. 2-6

Environment......................................................... 2-2

Ethernet Communications ................................... 5-7

Ethernet wiring..................................................... 5-8

EUs ...................................................................... 6-6

Event Log........................................................... 1-11

EXP......................................................1-2, 1-4, 2-10

Attaching ....................................................... 2-11

Detaching ...................................................... 2-12

FCC Information .................................................. 1-8

Field wiring

Analog Input module ....................................... 4-7

Analog Output module..................................... 4-9

Discrete Input module ................................... 4-10

Discrete Output module................................. 4-11

Discrete Output Relay module ...................... 4-12

HART Interface module................................. 5-18

Pulse Input module (externally powered)......4-14

Pulse Input module (ROC800-powered)....... 4-14

Figures

1-1. ROC827 ................................................... 1-3

1-2. ROC827 and Expanded Backplane......... 1-4

2-1. Side View, ROC827 .................................2-8

2-2. Bottom View, ROC827 .............................2-8

2-3. Back View, ROC827.................................2-9

2-4. ROC827 and Expanded Backplane .......2-10

2-5. Power Connector on EXP ......................2-11

2-6. CPU Front View......................................2-14

2-6. Plastic snaps, EXP.................................2-12

2-7. CPU Connectors ....................................2-14

2-8. License key ............................................2-17

3-1. 12 V dc Power Input module....................3-2

3-2. 24 V dc Power Input module....................3-4

3-3. 12 V dc Auxiliary Power Wiring................3-5

3-4. 24 V dc Auxiliary Power Wiring................3-5

3-5. 12 V dc Power Supply and BAT+ / BAT–

Wiring ..........................................................3-22

3-6. 12 V dc Power Supply and CHG+ and CHG–

Wiring ..........................................................3-23

4- 1. Typical I/O Module ..................................4-2

4- 2. Optional I/O Module Locations................4-2

4- 3. Installing an I/O Module ..........................4-5

4- 4. Analog Input Jumper J4 (at +24V) ..........4-7

4- 5. Analog Input Module Field Wiring...........4-7

4- 6. Analog Output Jumper J4 (at +12 V) ......4-8

4- 7. Analog Output Module Field Wiring ........4-9

4- 8. Discrete Input Module Field Wiring .......4-10

4- 9. Discrete Output Module Field Wiring ....4-11

4-10. Discrete Output Relay Module Field Wiring

.....................................................................4-12

4-11. Pulse Input J4 Jumper (at +12V) .........4-13

4-12. Externally Powered Pulse Input Module

Field Wiring .................................................4-14

4-13. ROC800-Powered Pulse Input Module Field

Wiring ..........................................................4-14

4-14. RTD Sensor Wiring Terminal Connections4-

4-15. Type J and K Thermocouple Wiring.....4-18

4-16. Type J Thermocouple Shielded Wiring – US

Color Coding ...............................................4-19

4-17. Type K Thermocouple Shielded Wiring – US

Color Coding ...............................................4-19

4-18. Ungrounded – Sheathed......................4-19

4-19. Grounded .............................................4-19

4-20. Exposed, Ungrounded – Unsheathed..4-19

5-1. Communication Ports...............................5-2

5-2. Example RS-485 Communications Module5-

5-3. RJ-45 Pin Out...........................................5-6

5-4. 10BASE T-Crossover Cable ....................5-9

5-5. EIA-422/485 (RS-422/485) J4 Jumper...5-12

5-6. MVS Jumper J4 (shown not terminated) 5-15

5-7. HART Interface Module Field Wiring......5-18

5-8. HART Channels 1 and 3 (back side of board)

.....................................................................5-18

5-9. HART Channels 2 and 4 (front side of board)

.....................................................................5-19

Firmware..............................................................1-8

Flow Calculations...............................................1-12

Function Sequence Table (FST)........................1-14

ROC827 Instruction Manual

Issued Mar-06 Index I-3

Fuse

Installing .......................................................... 3-5

Removing ........................................................ 3-5

Gauges, wire.................................................4-6, 5-5

Ground................................................................. 2-4

Hardware ............................................................. 1-2

Hardware Watchdog.......................................... 1-13

HART Interface module .....................................5-16

Hazardous Area................................................... 2-3

Historical Database............................................ 1-11

Housing................................................................ 2-5

I/O modules ......................................................... 4-1

Analog Inputs .................................................. 4-6

Analog Outputs................................................ 4-8

Discrete Inputs ................................................4-9

Discrete Output Relay ...................................4-11

Discrete Outputs............................................ 4-10

Installation and Setup...................................... 4-3

Installing .......................................................... 4-4

J and K Type Thermocouple Inputs ..............4-16

Pulse Inputs................................................... 4-12

Removing ........................................................ 4-5

RTD Inputs .................................................... 4-14

Specifications ................................................ 4-21

Wiring .............................................................. 4-6

I/O Wiring............................................................. 2-5

Input/Output.........................................................4-1

Installation.....................................................2-1, 2-7

Installing

Auxiliary Output Fuse......................................3-5

Communication modules................................. 5-3

Input/Output modules...................................... 4-4

Power Input module ...................................... 3-21

J and K Type Thermocouple Inputs................... 4-16

Troubleshooting............................................. 6-10

Jumpers

AI +T (+12 or +24)........................................... 4-6

AO +12 or +24................................................. 4-8

EIA-422 (RS-422) module............................. 5-12

EIA-422/485 (RS-422/485) Communications 5-11

MVS J4.......................................................... 5-14

Pulse Inputs J4..............................................4-13

LED.................................................................... 2-15

AUX+ and AUX–.............................................. 3-3

Communications.............................................. 5-2

Dial-up Modem ..............................................5-13

Discrete Inputs.................................................4-9

Discrete Output Relay ...................................4-11

Discrete Outputs............................................4-10

EIA-232 (RS-232) Communications................5-9

EIA-422/485 (RS-422/485) Communications 5-11

Multi-Variable Sensor ....................................5-15

Power Input Module..................................3-3, 3-4

Pulse Inputs...................................................4-13

STATUS ........................................................2-15

License Key .......................................................2-17

Installing ........................................................2-18

Removing ......................................................2-19

Light-Emitting Diodes (LED) ................................1-5

Local Operator Interface

See Local Port.................................................5-5

Local Port.............................................................5-1

Location ........................................................2-2, 2-3

Logical..................................................................1-9

LOI

See Local Port.................................................5-5

LOI Port

Using................................................................5-7

Low Power Modes .............................................1-13

Memory................................................................1-6

Meter Runs ........................................................1-12

Module Cover.......................................................2-7

Module Slot Addressing.....................................1-10

Modules

Communications..............................................5-1

Input/Output (I/O).............................................4-1

Power...............................................................3-1

Monitoring ............................................................1-7

Mounting ..............................................................2-7

Multi-Variable Sensor

Jumper J4......................................................5-14

LEDs..............................................................5-15

MVS...............................................................5-14

Termination....................................................5-14

Wiring.............................................................5-15

Operation ...........................................................2-20

Operator Interface Port

See Local Port.................................................5-5

Parameters ..........................................................1-9

PID Control ........................................................1-14

Point.....................................................................1-9

Point Type............................................................1-9

Polarity...............................................................1-13

Power...................................................................2-4

Connections.....................................................3-1

Consumption ...................................................3-7

ROC827 Instruction Manual

Issued Mar-06 Index I-4

Low Modes.................................................... 1-13

Operating....................................................... 1-13

Requirements.................................................. 3-8

Sleep Mode ................................................... 1-14

Standby Mode ............................................... 1-13

Wiring ............................................................ 3-21

Power Input module............................................. 3-1

12 V dc ............................................................ 3-1

24 V dc ............................................................ 3-3

Installing ........................................................ 3-21

Removing ...................................................... 3-20

Power Input modules

Specifications ................................................ 3-26

Processor and Memory ....................................... 1-6

Proportional, Integral, and Derivative (PID)

See PID Control ............................................1-14

Public Switched Telephone Networks

PSTNs ........................................................... 5-12

Pulse Inputs.......................................................4-12

+12 and +24 V dc..........................................4-13

J4 Jumper......................................................4-13

LEDs..............................................................4-13

Troubleshooting............................................... 6-9

Real-Time Clock .................................................. 1-6

Removing

Auxiliary Output Fuse......................................3-5

Communications module................................. 5-4

I/O modules ..................................................... 4-5

Power Input module ...................................... 3-20

Removing an EXP ............................................. 2-12

Report-By-Exception (RBX)............................... 1-16

RESET............................................................... 2-15

Resistance Temperature Detector

See RTD Inputs............................................. 4-14

Restarting the ROC827 ....................................... 6-4

ROC827............................................................... 1-2

ROCLINK 800 Configuration Software.............. 1-15

RTD Inputs......................................................... 4-14

Troubleshooting............................................... 6-9

Wiring ............................................................ 4-15

Security.......................................................1-10, 5-5

Serial Communications

EIA-232 (RS-232)............................................ 5-9

EIA-422/485 (RS-422/485)............................ 5-10

Setup

I/O Modules ..................................................... 4-3

Site....................................................................... 2-2

Sleep Mode........................................................ 1-14

Software Watchdog ...........................................1-13

Specifications

Communications modules.............................5-20

I/O modules ................................................... 4-21

Power Input modules..................................... 3-26

Spontaneous-Report-By-Exception (SRBX)......1-16

SRBX/RBX Alarming..........................................1-16

Standby Mode....................................................1-13

Start ...................................................................2-19

Stations..............................................................1-12

STATUS LED.....................................................2-15

Storage

Battery ...........................................................3-20

Switched Auxiliary Output....................................3-6

System Analog Inputs..........................................1-7

Tables

1-1. System Analog Inputs ..............................1-7

1-2. 16-point vs. 8-point addressing..............1-11

2-1. CPU Connector Locations......................2-15

2-2. STATUS LED Functions ........................2-15

3- 1. 12 V dc Power Input Terminal Block

Connections ..................................................3-3

3- 2. 12 V dc Power Input LED Fault Indicators3-3

3- 3. 24 V dc Power Input Terminal Block

Connections ..................................................3-4

3- 4. 24 V dc Power Input LED Indicators .......3-4

3- 5. Estimated Power Consumption.............3-10

3- 6. Power Consumption, Analog Input module3-

3- 7. Power Consumption, Analog Output module

.....................................................................3-13

3- 8. Power Consumption, Discrete Input module

.....................................................................3-14

3- 9. Power Consumption, Discrete Output

module.........................................................3-15

3-10. Power Consumption, Discrete Output Relay

module.........................................................3-16

3-11. Power Consumption, Pulse Input module 3-

3-12. Power Consumption, MVS module ......3-18

3-13. Power Consumption, RTD module.......3-19

3-14. Power Consumption, Thermocouple module

.....................................................................3-19

3-15. Power Consumption, HART module ....3-19

3-16. Power Consumption, Other Devices....3-20

3-17. Replacement Battery Types.................3-25

3-18. Power Input Module Specification Sheets3-

4-1. RTD Signal Routing................................4-15

4-2. RTD Wiring.............................................4-16

4-3. I/O Module Specification Sheets............4-21

5- 1. Built-in Communications and Optional

Communications Modules.............................5-1

5- 2. Communication LED Indicator Defintions5-2

5- 3. Built-in LOI EIA-232 Signal Routing........5-6

5- 4. RJ-45 to EIA-232 (RS-232) Null-modem

Cable Signal Routing.....................................5-6

5- 5. Using Cable Warehouse 0378-2 D-Sub to

Modular Converter 9-Pin to RJ-45 Black.......5-6

5- 6. Ethernet Signal LEDs..............................5-8

ROC827 Instruction Manual

Issued Mar-06 Index I-5

5- 7. Built-in EIA-232 (RS-232) Signal Routing –

Comm2........................................................ 5-10

5- 8. EIA-232 (RS-232) Communication Module

Signal Routing – Comm3, Comm4, and Comm5

.................................................................... 5-10

5- 9. EIA-422 (RS-422) Signal Routing – Comm3,

Comm4, Comm5 ......................................... 5-11

5-10. EIA-485 (RS-485) Signal Routing – Comm3,

Comm4, Comm5 ......................................... 5-11

5-11. EIA-422 (RS-422) Module.................... 5-12

5-12. EIA-485 (RS-485) module.................... 5-12

5-13. RJ-11 Field Connections...................... 5-13

5-14. Modem Signal Routing – Comm3, Comm4,

and Comm5................................................. 5-13

5-15. MVS Termination ................................. 5-14

5-16. MVS Signal Routing – Comm3, Comm4,

and Comm5................................................. 5-15

5-17. Communications Modules Related

Documentation............................................ 5-20

6-1. Analog Input Module Typical Configuration

Values ........................................................... 6-5

TEMP

LED.................................................................. 3-3

Temperature Detector

See J and K Type Thermocouple Inputs.......4-16

Termination

EIA-422/485 (RS-422/485) Communications 5-11

MVS............................................................... 5-14

Tests

Automatic ...................................................... 1-13

Thermocouple

See J and K Type Thermocouple Inputs.......4-16

TLP ...................................................................... 1-9

Troubleshooting

Analog Inputs .................................................. 6-5

Analog Outputs................................................ 6-7

Discrete Inputs ................................................6-7

Discrete Output Relay ..................................... 6-8

Discrete Outputs.............................................. 6-8

J and K Type Thermocouple Inputs ..............6-10

Pulse Inputs.....................................................6-9

RTD Input ........................................................6-9

System Analog Inputs......................................1-7

Tuning the Configuration ...................................3-11

Using

LOI Port ...........................................................5-7

UTP......................................................................5-8

V12

LED..................................................................3-4

V3.3

LED..................................................................3-4

VOFF

LED...........................................................3-3, 3-4

VOK

LED..................................................................3-3

Voltage.................................................................3-1

VOVER

LED..................................................................3-3

Watchdog

Software and Hardware.................................1-13

Wire Channel Covers...........................................2-6

Wire gauges..................................................4-6, 5-5

Wiring

Auxiliary Power................................................3-4

Communications..............................................5-5

Dial-up modem ..............................................5-13

External Batteries ..........................................3-23

I/O Modules .....................................................4-6

I/O Requirements ............................................2-5

Multi-Variable Sensor ....................................5-15

RTD Input ......................................................4-15

ROC827 Instruction Manual

Issued Mar-06 Index I-6

If you have comments or questions regarding this

manual, please direct them to your local sales

representative or contact:

Emerson Process Management

Flow Computer Division

Marshalltown, IA 50158 U.S.A.

Houston, TX 77065 U.S.A.

Pickering, North Yorkshire UK Y018 7JA

Website: www.EmersonProcess.com/flow

Emerson Roc827 Instruction Manual

ROC827 53e78454-fa14-41e9-b71b-c7c471d62f23

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