1762 UM001H EN P MicroLogix 1200 Programmable Controllers User Manual AB Um001

MicroLogix1200%20-%20User%20Manual

User Manual: AB-1200

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MicroLogix 1200
Programmable
Controllers
Bulletin 1762 Controllers and
Expansion I/O

User Manual

Important User Information

Solid state equipment has operational characteristics differing from those of
electromechanical equipment. Safety Guidelines for the Application, Installation and
Maintenance of Solid State Controls publication SGI-1.1 available from your local
Rockwell Automation sales office or online at
http://www.literature.rockwellautomation.com describes some important differences
between solid state equipment and hard-wired electromechanical devices. Because of
this difference, and also because of the wide variety of uses for solid state equipment,
all persons responsible for applying this equipment must satisfy themselves that each
intended application of this equipment is acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or
consequential damages resulting from the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes.
Because of the many variables and requirements associated with any particular
installation, Rockwell Automation, Inc. cannot assume responsibility or liability for
actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of
information, circuits, equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written
permission of Rockwell Automation, Inc. is prohibited.
Throughout this manual we use notes to make you aware of safety considerations.
WARNING

IMPORTANT

ATTENTION

Identifies information about practices or circumstances
that can cause an explosion in a hazardous environment,
which may lead to personal injury or death, property
damage, or economic loss.

Identifies information that is critical for successful
application and understanding of the product.
Identifies information about practices or circumstances
that can lead to personal injury or death, property
damage, or economic loss. Attentions help you:
• identify a hazard
• avoid a hazard
• recognize the consequence

Publication 1762-UM001H-EN-P - June 2015

SHOCK HAZARD

Labels may be located on or inside the drive to alert
people that dangerous voltage may be present.

BURN HAZARD

Labels may be located on or inside the drive to alert
people that surfaces may be dangerous temperatures.

Summary of Changes
To help you find new and updated information in this release of the manual,
we have included change bars as shown to the right of this paragraph.
The table below lists the sections that document new features and additional
or updated information on existing features.

Firmware Revision History

1

For this information:

See

Updated list of communication cables.

1-4, 2-4, 4-4

Updated list of warnings for Hazardous
Location considerations

2-4

Updated list of cables for Cable Selection
Guide.

4-13

Removed catalog 1761-NET-DNI

1-4, Chapter 4

Added Relay Output life to Specifications.

A-3

Added Relay Life Chart to Specifications.

A-4

Features are added to the controllers through firmware upgrades. See the latest
release notes, 1762-RN001, to be sure that your controller’s firmware is at the
level you need. Firmware upgrades are not required, except to allow you access
to the new features.

Publication 1762-UM001H-EN-P - June 2015

Summary of Changes

2

Notes:

Publication 1762-UM001H-EN-P - June 2015

Table of Contents
Important User Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Firmware Revision History . . . . . . . . . . . . . . . . Summary of Changes-1

Preface

Who Should Use This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Purpose of This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Related Documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Common Techniques Used in This Manual . . . . . . . . . . . . . . . . . . . .

P-1
P-1
P-2
P-2

Chapter 1
Hardware Overview

Hardware Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Component Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MicroLogix 1200 Memory Module and/or Real-time Clock. . . .
1762 Expansion I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Communication Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Program the Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Communication Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1
1-2
1-2
1-3
1-4
1-4
1-4

Chapter 2
Install Your Controller

i

Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Agency Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Compliance to European Union Directives . . . . . . . . . . . . . . . . . . . . 2-2
EMC Directive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Low Voltage Directive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Safety Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Hazardous Location Considerations. . . . . . . . . . . . . . . . . . . . . . . 2-3
Disconnect Main Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Safety Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Power Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Periodic Tests of Master Control Relay Circuit . . . . . . . . . . . . . . 2-6
Power Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Isolation Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Power Supply Inrush . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Loss of Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Input States on Power Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Other Types of Line Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Prevent Excessive Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Master Control Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Use Emergency-Stop Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Schematic (Using IEC Symbols) . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Schematic (Using ANSI/CSA Symbols). . . . . . . . . . . . . . . . . . . 2-11
Install a Memory Module or Real-time Clock. . . . . . . . . . . . . . . . . . 2-12
Controller Mounting Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Controller and
Expansion I/O Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Mount the Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
DIN Rail Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Publication 1762-UM001H-EN-P - June 2015

Table of Contents

ii

Panel Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1762 Expansion I/O Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . .
Mount 1762
Expansion I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DIN Rail Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mount on Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connect Expansion I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-16
2-17
2-17
2-17
2-18
2-19

Chapter 3
Wire Your Controller

Wire Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Wire without Spade Lugs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Wire with Spade Lugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Use Surge Suppressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Recommended Surge Suppressors . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Ground the Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Terminal Block Layouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Terminal Groupings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Sinking and Sourcing Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . 3-12
1762-L24AWA, 1762-L24BWA, 1762-L24BXB, 1762-L24AWAR,
1762-L24BWAR and 1762-L24BXBR Wiring Diagrams . . . . . 3-12
1762-L40AWA, 1762-L40BWA, 1762-L40BXB, 1762-L40AWAR,
1762-L40BWAR and 1762-L40BXBR Wiring Diagrams . . . . . 3-15
Controller I/O Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Minimize Electrical Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Expansion I/O Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Discrete Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Analog Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25

Chapter 4
Communication Connections

Publication 1762-UM001H-EN-P - June 2015

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Supported Communication Protocols. . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Default Communication Configuration . . . . . . . . . . . . . . . . . . . . . . . 4-2
Use the Communications Toggle Push Button . . . . . . . . . . . . . . . . . 4-3
Connect to the RS-232 Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Make a DF1 Point-to-Point Connection . . . . . . . . . . . . . . . . . . . 4-5
Use a Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Isolated Modem Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Connect to a DF1 Half-duplex Network . . . . . . . . . . . . . . . . . . . 4-8
Connect to a DH-485 Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Recommended Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
DH-485 Communication Cable . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Connect the Communication Cable to the DH-485 Connector 4-10
Ground and Terminate the DH-485 Network. . . . . . . . . . . . . . 4-12
Connect the AIC+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

Table of Contents

iii

Cable Selection Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended User-supplied Components. . . . . . . . . . . . . . . .
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install and Attach the AIC+ . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Apply Power to the AIC+. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-13
4-15
4-17
4-17
4-17

Chapter 5
Use Trim Pots

Trim Pot Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Trim Pot Information Function File . . . . . . . . . . . . . . . . . . . . . . 5-2
Error Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Chapter 6
Use Real-time Clock and Memory Real-time Clock Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Removal/Insertion Under Power . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Modules
Write Data to the Real-time Clock . . . . . . . . . . . . . . . . . . . . . . . .
RTC Battery Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memory Module Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
User Program and Data Back-up . . . . . . . . . . . . . . . . . . . . . . . . .
Program Compare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Data File Download Protection . . . . . . . . . . . . . . . . . . . . . . . . . .
Memory Module Write Protection . . . . . . . . . . . . . . . . . . . . . . . .
Removal/Insertion Under Power . . . . . . . . . . . . . . . . . . . . . . . . .

6-2
6-2
6-3
6-3
6-4
6-4
6-4
6-4

Appendix A
Specifications

Controller Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Expansion I/O Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
Discrete I/O Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
Analog Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-15
Combination Module DC-Input/Relay Output. . . . . . . . . . . . A-23

Appendix B
1762 Replacement Parts

MicroLogix 1200 RTB Replacement Kit . . . . . . . . . . . . . . . . . . . . . . B-1

Appendix C
Troubleshoot Your System

Interpret LED Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
Error Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
Controller Error Recovery Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3
Analog Expansion I/O Diagnostics and Troubleshooting . . . . . . . . C-4
Module Operation and Channel Operation . . . . . . . . . . . . . . . . . C-4
Power-up Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-4
Critical and Noncritical Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . C-5
Module Error Definition Table. . . . . . . . . . . . . . . . . . . . . . . . . . . C-5
Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-7
Publication 1762-UM001H-EN-P - June 2015

Table of Contents

iv

Call Rockwell Automation for Assistance. . . . . . . . . . . . . . . . . . . . . . C-8

Appendix D
Use Control Flash to Upgrade Your Prepare for Upgrade. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1
Install ControlFlash Software . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1
Operating System

Prepare the Controller for Updating. . . . . . . . . . . . . . . . . . . . . . D-2
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2
Missing/Corrupt OS LED Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . D-2

Appendix E
Connect to Networks via RS-232
Interface

RS-232 Communication Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-1
DF1 Full-duplex Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-1
DF1 Half-duplex Protocol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-2
Use Modems with MicroLogix 1200 Programmable Controllers E-3
DH-485 Communication Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . E-5
Devices that use the DH-485 Network . . . . . . . . . . . . . . . . . . . . E-5
Important DH-485 Network Planning Considerations . . . . . . . . E-6
Example DH-485 Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . E-9
Modbus Communication Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . E-12
ASCII . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-12

Appendix F
System Loading and Heat
Dissipation

Glossary
Index

Publication 1762-UM001H-EN-P - June 2015

System Loading Limitations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-1
System Current Loading Example Calculations (24-point Controller)
F-1
Validate the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-2
System Loading Worksheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-4
Current Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-4
System Current Loading Example Calculations (40-point Controller)
F-6
System Loading Worksheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-8
Current Loading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-8
Calculating Heat Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-10

Preface
Read this preface to familiarize yourself with the rest of the manual. It provides
information concerning:
•
•
•
•

Who Should Use This
Manual

who should use this manual
the purpose of this manual
related documentation
conventions used in this manual

Use this manual if you are responsible for designing, installing, programming,
or troubleshooting control systems that use MicroLogix 1200 controllers.
You should have a basic understanding of electrical circuitry and familiarity
with relay logic. If you do not, obtain the proper training before using this
product.

Purpose of This Manual

This manual is a reference guide for MicroLogix 1200 controllers and
expansion I/O. It describes the procedures you use to install, wire, and
troubleshoot your controller. This manual:
• explains how to install and wire your controllers
• gives you an overview of the MicroLogix 1200 controller system
Refer to publication 1762-RM001, MicroLogix 1200 and 1500 Programmable
Controllers Instruction Set Reference Manual, for the MicroLogix 1200 and
1500 instruction set and for application examples to show the instruction set
in use. Refer to your RSLogix 500 programming software user documentation
for more information on programming your MicroLogix 1200 controller.

1

Publication 1762-UM001H-EN-P - June 2015

P-2

Preface

Related Documentation
The following documents contain additional information concerning Rockwell
Automation products. To obtain a copy, contact your local
Rockwell Automation office or distributor.
Resource

Description

MicroLogix 1200 and 1500 Programmable Controllers
Instruction Set Reference Manual, publication
1762-RM001

Information on the MicroLogix 1200 Controllers instruction set.

MicroLogix 1200 Programmable Controllers Installation
Instructions, publication 1762-IN006

Information on mounting and wiring the MicroLogix 1200 Controllers, including
a mounting template for easy installation.

Advanced Interface Converter (AIC+) User Manual,
publication 1761-UM004

A description on how to install and connect an AIC+. This manual also
contains information on network wiring.

DeviceNet Interface User Manual, publication
1761-UM005

Information on how to install, configure, and commission a DNI.

DF1 Protocol and Command Set Reference Manual,
publication 1770-6.5.16

Information on DF1 open protocol.

Modbus Protocol Specifications available from
www.modbus.org

Information about the Modbus protocol.

Allen-Bradley Programmable Controller Grounding and
Wiring Guidelines, publication 1770-4.1

In-depth information on grounding and wiring Allen-Bradley programmable
controllers.

Application Considerations for Solid-State Controls,
publication SGI-1.1

A description of important differences between solid-state programmable
controller products and hard-wired electromechanical devices.

National Electrical Code - Published by the National Fire
Protection Association of Boston, MA.

An article on wire sizes and types for grounding electrical equipment.

Allen-Bradley Industrial Automation Glossary,
publication AG-7.1

A glossary of industrial automation terms and abbreviations.

Common Techniques Used
in This Manual

Publication 1762-UM001H-EN-P - June 2015

The following conventions are used throughout this manual:
• Bulleted lists such as this one provide information, not procedural steps.
• Numbered lists provide sequential steps or hierarchical information.

Chapter

1

Hardware Overview

Hardware Features

The Bulletin 1762, MicroLogix 1200 programmable controller contains a
power supply, input and output circuits, and a processor. The controller is
available in 24 I/O and 40 I/O configurations.
Figure 1.1 Hardware Features of the Controller
Top View

Side View

7
6
10
8

2
0
1

5
12

COM

3

9
4
7

11

1

Table 1.1 Hardware Features
Feature

Description

Feature

Description

1

Terminal Blocks
(Removable Terminal Blocks on 40-point controllers
only.)

7

Terminal Doors and Labels

2

Bus Connector Interface to Expansion I/O

8

Trim Pots

3

Input LEDs

9

Communications Toggle Push Button

4

Output LEDs

10

Memory Module Port Cover(1) -orMemory Module and/or Real-Time Clock(2)

5

Communication Port/
Channel 0

11

DIN Rail Latches

6

Status LEDs

12

Programmer/HMI Port
(Equipped with 1762-LxxxxxR controllers only)

(1) Shipped with controller.
(2) Optional equipment.

1

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1-2

Hardware Overview

Table 1.2 Controller Input Power and Embedded I/O
Catalog Number
1762-L24AWA, 1762-L24AWAR
1762-L24BWA, 1762-L24BWAR

Description
Input Power
120/240V ac
120/240V ac

1762-L24BXB, 1762-L24BXBR

24V dc

1762-L40AWA, 1762-L40AWAR
1762-L40BWA, 1762-L40BWAR

120/240V ac
120/240V ac

1762-L40BXB, 1762-L40BXBR

24V dc

Component Descriptions

Inputs
(14) 120V ac
(10) 24V dc
(4) fast 24V dc
(10) 24V dc
(4) fast 24V dc
(24) 120V ac
(20) 24V dc
(4) fast 24V dc
(20) 24V dc
(4) fast 24V dc

Outputs
(10) relay
(10) relay
(5) relay, (4) 24V dc FET
(1) high-speed 24V dc FET
(16) relay
(16) relay
(8) relay, (7) 24V dc FET
(1) high-speed 24V dc FET

These sections provide component descriptions for:
• MicroLogix 1200 Memory Module and/or Real-time Clock
• 1762 Expansion I/O

MicroLogix 1200 Memory Module and/or Real-time Clock
The controller is shipped with a memory module port cover in place. You can
order a memory module, real-time clock, or memory module and real-time
clock as an accessory.

Table 1.3 Memory Module and/or Real-time Clock

Publication 1762-UM001H-EN-P - June 2015

Catalog Number

Description

1762-MM1

Memory Module only

1762-RTC

Real-time Clock only

1762-MM1RTC

Memory Module and Real-Time Clock

Hardware Overview

1-3

1762 Expansion I/O
1762 expansion I/O can be connected to the MicroLogix 1200 controller, as
shown below.
1762 Expansion I/O

TIP

1762 Expansion I/O Connected to MicroLogix 1200 Controller

A maximum of six I/O modules, in certain combinations,
may be connected to a controller. See Appendix F, System
Loading and Heat Dissipation, to determine valid
combinations.

Table 1.4 Expansion I/O
Catalog Number

Descriptions

1762-IA8

8-point 120V ac Input

1762-IQ8

8-point Sink/Source 24V dc Input

1762-IQ16

16-point Sink/Source 24V dc Input

1762-IQ32T

32-point Sink/Source 24V dc Input Module

1762-OA8

8-point AC Triac Output

1762-OB8

8-point Sourcing 24V dc Output

1762-OB16

16-point Sourcing 24V dc Output

1762-OB32T

32-point Sourcing 24V dc Output Module

1762-OV32T

32-point Sinking 24V dc Output Module

1762-OW8

8-point AC/DC Relay Output

1762-OW16

16-point AC/DC Relay Output

1762-OX6I

6-point Isolated Relay Output

1762-IF2OF2

2-channel Analog Voltage/Current Input
2-channel Analog Voltage/Current Output

1762-IF4

4-channel Analog Voltage/Current Input

1762-OF4

4-channel Analog Voltage/Current Output

1762-IR4

RTD/Resistance Input

1762-IT4

Thermocouple/mV Input

1762-IQ8OW6

DC-input/Relay-output Combination Module

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Hardware Overview

Communication Cables

Use only the following communication cables with the MicroLogix 1200
controllers.
•
•
•
•
•
•
•
•
•
•

1761-CBL-PM02 series C or later
1761-CBL-HM02 series C or later
1761-CBL-AM00 series C or later
1761-CBL-AP00 series C or later
1761-CBL-PH02 Series A or later
1761-CBL-AH02 Series A or later
2707-NC8 series A or later
2702-NC9 series B or later
2707-NC10 series B or later
2707-NC11 series B or later

Program the Controller

You program the MicroLogix 1200 programmable controller using RSLogix
500, revision 4 or later. You must use revision 4.5 or later of RSLogix 500 in
order to use the new features of the series B MicroLogix 1200 controllers,
including the full ASCII instruction set. Communication cables for
programming are not included with the software.

Communication Options

The MicroLogix 1200 can be connected to a personal computer. It can also be
connected to a DH-485 network, or a Modbus network as an RTU Master or
RTU Slave using an Advanced Interface Converter (catalog number
1761-NET-AIC). The controller can also be connected to DF1 Half-duplex
networks as an RTU Master or RTU Slave. Series B controllers may also be
connected to serial devices using ASCII.
See Chapter 4 Communication Connections for more information on
connecting to the available communication options.
The 1762-LxxxxxR controllers provide an additional communication port
called the Programmer/HMI Port. This port supports DF1 full-duplex
protocol only. The controller cannot initiate messages through this port. It can
only respond to messages sent to it. All communication parameters are fixed
and cannot be changed by a user.
See Default Communication Configuration on page 4-2 for the configuration
settings.

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Chapter

2

Install Your Controller

This chapter shows you how to install your controller.
Topics include:
•
•
•
•
•
•
•
•
•
•
•
•
•
•

Required Tools
Agency Certifications

1

required tools
agency certifications
compliance to European Union Directives
installation considerations
safety considerations
power considerations
preventing excessive heat
master control relay
install the memory module and/or real-time clock
controller mounting dimensions
controller and expansion I/O spacing
mount the controller
mount 1762 expansion I/O
connect 1762 expansion I/O

You need a screwdriver and a drill.

• UL 508
• C-UL under CSA C22.2 no. 142
• Class I, Division 2, Groups A, B, C, D
(UL 1604, C-UL under CSA C22.2 no. 213)
• CE compliant for all applicable directives
• C-Tick compliant for all applicable acts

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Install Your Controller

Compliance to European
Union Directives

This product has the CE mark and is approved for installation within the
European Union and EEA regions. It has been designed and tested to meet
the following directives.

EMC Directive
This product is tested to meet Council Directive 89/336/EEC
Electromagnetic Compatibility (EMC) and the following standards, in whole
or in part, documented in a technical construction file:
• EN 50081-2
EMC - Generic Emission Standard, Part 2 - Industrial Environment
• EN 50082-2
EMC - Generic Immunity Standard, Part 2 - Industrial Environment
This product is intended for use in an industrial environment.

Low Voltage Directive
This product is tested to meet Council Directive 73/23/EEC Low Voltage, by
applying the safety requirements of EN 61131-2 Programmable Controllers,
Part 2 - Equipment Requirements and Tests.
For specific information required by EN 61131-2, see the appropriate sections
in this publication, as well as the following Allen-Bradley publications:
• Industrial Automation Wiring and Grounding Guidelines for Noise
Immunity, publication 1770-4.1
• Guidelines for Handling Lithium Batteries, publication AG-5.4
• Automation Systems Catalog, publication B113

Installation Considerations

Most applications require installation in an industrial enclosure (Pollution
Degree 2(1)) to reduce the effects of electrical interference (Over Voltage
Category II(2)) and environmental exposure. Locate your controller as far as
possible from power lines, load lines, and other sources of electrical noise such
as hard-contact switches, relays, and AC motor drives. For more information
on proper grounding guidelines, see the Industrial Automation Wiring and
Grounding Guidelines publication 1770-4.1.
(1) Pollution Degree 2 is an environment where normally only non-conductive pollution occurs except that
occasionally temporary conductivity caused by condensation shall be expected.
(2) Overvoltage Category II is the load level section of the electrical distribution system. At this level, transient
voltages are controlled and do not exceed the impulse voltage capability of the products insulation.

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Install Your Controller

ATTENTION

ATTENTION

Safety Considerations

2-3

Vertical mounting of the controller is not
recommended due to heat build-up considerations.

Be careful of metal chips when drilling mounting
holes for your controller or other equipment within
the enclosure or panel. Drilled fragments that fall
into the controller or I/O modules could cause
damage. Do not drill holes above a mounted
controller if the protective debris shields are
removed or the processor is installed.

Safety considerations are an important element of proper system installation.
Actively thinking about the safety of yourself and others, as well as the
condition of your equipment, is of primary importance. We recommend
reviewing the following safety considerations.

Hazardous Location Considerations
This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or
non-hazardous locations only. The following WARNING statement applies to
use in hazardous locations.

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Install Your Controller

WARNING

EXPLOSION HAZARD
• Substitution of components may impair suitability
for Class I, Division 2.
• Do not replace components or disconnect
equipment unless power has been switched off.
• Do not connect or disconnect components unless
power has been switched off.
• This product must be installed in an enclosure.
All cables connected to the product must remain
in the enclosure or be protected by conduit or
other means.
• All wiring must comply with N.E.C. article 501-4(b).
• The interior of the enclosure must be accessible only by
the use of a tool.
• For applicable equipment (for example, relay modules),
exposure to some chemicals may degrade the sealing
properties of the materials used in these devices:
– Relays, epoxy
It is recommended that you periodically inspect these
devices for any degradation of properties and replace
the module if degradation is found.

Use only the following communication cables in Class I, Division 2 hazardous
locations.
Communication Cables for Class I, Division 2 Hazardous Locations
1761-CBL-PM02 series C or later
1761-CBL-HM02 series C or later
1761-CBL-AM00 series C or later
1761-CBL-AP00 series C or later
1761-CBL-PH02 series A or later
1761-CBL-AH02 series A or later
2707-NC8 series A or later
2707-NC9 series B or later
2707-NC10 series B or later
2707-NC11 series B or later

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2-5

Disconnect Main Power
WARNING

Explosion Hazard
Do not replace components or disconnect equipment
unless power has been switched off.

The main power disconnect switch should be located where operators and
maintenance personnel have quick and easy access to it. In addition to
disconnecting electrical power, all other sources of power (pneumatic and
hydraulic) should be de-energized before working on a machine or process
controlled by a controller.

Safety Circuits
WARNING

Explosion Hazard
Do not connect or disconnect connectors while
circuit is live.

Circuits installed on the machine for safety reasons, like overtravel limit
switches, stop push buttons, and interlocks, should always be hard-wired
directly to the master control relay. These devices must be wired in series so
that when any one device opens, the master control relay is de-energized,
thereby removing power to the machine. Never alter these circuits to defeat
their function. Serious injury or machine damage could result.

Power Distribution
There are some points about power distribution that you should know:
• The master control relay must be able to inhibit all machine motion by
removing power to the machine I/O devices when the relay is
de-energized. It is recommended that the controller remain powered
even when the master control relay is de-energized.
• If you are using a dc power supply, interrupt the load side rather than
the ac line power. This avoids the additional delay of power supply
turn-off. The dc power supply should be powered directly from the
fused secondary of the transformer. Power to the dc input and output
circuits should be connected through a set of master control relay
contacts.
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Install Your Controller

Periodic Tests of Master Control Relay Circuit
Any part can fail, including the switches in a master control relay circuit. The
failure of one of these switches would most likely cause an open circuit, which
would be a safe power-off failure. However, if one of these switches shorts
out, it no longer provides any safety protection. These switches should be
tested periodically to assure they will stop machine motion when needed.

Power Considerations

The following explains power considerations for the micro controllers.

Isolation Transformers
You may want to use an isolation transformer in the ac line to the controller.
This type of transformer provides isolation from your power distribution
system to reduce the electrical noise that enters the controller and is often used
as a step-down transformer to reduce line voltage. Any transformer used with
the controller must have a sufficient power rating for its load. The power
rating is expressed in volt-amperes (VA).

Power Supply Inrush
During power-up, the MicroLogix 1200 power supply allows a brief inrush
current to charge internal capacitors. Many power lines and control
transformers can supply inrush current for a brief time. If the power source
cannot supply this inrush current, the source voltage may sag momentarily.
The only effect of limited inrush current and voltage sag on the MicroLogix
1200 is that the power supply capacitors charge more slowly. However, the
effect of a voltage sag on other equipment should be considered. For example,
a deep voltage sag may reset a computer connected to the same power source.
The following considerations determine whether the power source must be
required to supply high inrush current:
• The power-up sequence of devices in a system.
• The amount of the power source voltage sag if the inrush current
cannot be supplied.
• The effect of voltage sag on other equipment in the system.
If the entire system is powered-up at the same time, a brief sag in the power
source voltage typically will not affect any equipment.

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2-7

Loss of Power Source
The power supply is designed to withstand brief power losses without
affecting the operation of the system. The time the system is operational
during power loss is called ‘program scan hold-up time after loss of power’.
The duration of the power supply hold-up time depends on the type and state
of the I/O, but is typically between 10 milliseconds and 3 seconds. When the
duration of power loss reaches this limit, the power supply signals the
processor that it can no longer provide adequate dc power to the system. This
is referred to as a power supply shutdown. The processor then performs an
orderly shutdown of the controller.

Input States on Power Down
The power supply hold-up time as described above is generally longer than the
turn-on and turn-off times of the inputs. Because of this, the input state
change from ‘On’ to ‘Off ’ that occurs when power is removed may be
recorded by the processor before the power supply shuts down the system.
Understanding this concept is important. The user program should be written
to take this effect into account.

Other Types of Line Conditions
Occasionally the power source to the system can be temporarily interrupted. It
is also possible that the voltage level may drop substantially below the normal
line voltage range for a period of time. Both of these conditions are considered
to be a loss of power for the system.

Prevent Excessive Heat

For most applications, normal convective cooling keeps the controller within
the specified operating range. Ensure that the specified temperature range is
maintained. Proper spacing of components within an enclosure is usually
sufficient for heat dissipation.
In some applications, a substantial amount of heat is produced by other
equipment inside or outside the enclosure. In this case, place blower fans
inside the enclosure to assist in air circulation and to reduce “hot spots” near
the controller.
Additional cooling provisions might be necessary when high ambient
temperatures are encountered.

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Install Your Controller

TIP

Master Control Relay

Do not bring in unfiltered outside air. Place the
controller in an enclosure to protect it from a
corrosive atmosphere. Harmful contaminants or dirt
could cause improper operation or damage to
components. In extreme cases, you may need to use
air conditioning to protect against heat build-up
within the enclosure.

A hard-wired master control relay (MCR) provides a reliable means for
emergency machine shutdown. Since the master control relay allows the
placement of several emergency-stop switches in different locations, its
installation is important from a safety standpoint. Overtravel limit switches or
mushroom-head push buttons are wired in series so that when any of them
opens, the master control relay is de-energized. This removes power to input
and output device circuits. Refer to the figures on pages 2-10 and 2-11.

ATTENTION

TIP

Never alter these circuits to defeat their function
since serious injury and/or machine damage could
result.

If you are using an external dc power supply,
interrupt the dc output side rather than the ac line
side of the supply to avoid the additional delay of
power supply turn-off.
The ac line of the dc output power supply should be
fused.
Connect a set of master control relays in series with
the dc power supplying the input and output
circuits.

Place the main power disconnect switch where operators and maintenance
personnel have quick and easy access to it. If you mount a disconnect switch
inside the controller enclosure, place the switch operating handle on the
outside of the enclosure, so that you can disconnect power without opening
the enclosure.
Whenever any of the emergency-stop switches are opened, power to input and
output devices should be removed.
When you use the master control relay to remove power from the external I/O
circuits, power continues to be provided to the controller’s power supply so
that diagnostic indicators on the processor can still be observed.
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2-9

The master control relay is not a substitute for a disconnect to the controller. It
is intended for any situation where the operator must quickly de-energize I/O
devices only. When inspecting or installing terminal connections, replacing
output fuses, or working on equipment within the enclosure, use the
disconnect to shut off power to the rest of the system.

TIP

Do not control the master control relay with the
controller. Provide the operator with the safety of a
direct connection between an emergency-stop
switch and the master control relay.

Use Emergency-Stop Switches
When using emergency-stop switches, adhere to the following points:
• Do not program emergency-stop switches in the controller program.
Any emergency-stop switch should turn off all machine power by
turning off the master control relay.
• Observe all applicable local codes concerning the placement and
labeling of emergency-stop switches.
• Install emergency-stop switches and the master control relay in your
system. Make certain that relay contacts have a sufficient rating for your
application. Emergency-stop switches must be easy to reach.
• In the following illustration, input and output circuits are shown with
MCR protection. However, in most applications, only output circuits
require MCR protection.
The following illustrations show the Master Control Relay wired in a grounded
system.

TIP

In most applications input circuits do not require
MCR protection; however, if you need to remove
power from all field devices, you must include MCR
contacts in series with input power wiring.

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Install Your Controller

Schematic (Using IEC Symbols)
L1

L2
230V ac
Disconnect
MCR

Fuse

230V ac
I/O
Circuits
Isolation
Transformer
X1 115V ac
or 230V ac

Operation of either of these contacts will
remove power from the external I/O
circuits, stopping machine motion.

X2

Emergency-Stop
Push Button
Overtravel
Limit Switch

Fuse

Stop

Start

Master Control Relay (MCR)
Cat. No. 700-PK400A1
Suppressor
Cat. No. 700-N24
MCR
Suppr.

MCR
MCR

115V ac or
230V ac
I/O Circuits
dc Power Supply.
Use IEC 950/EN 60950
_
+
(Lo)

(Hi)

Line Terminals: Connect to terminals of Power
Supply (1762-L24AWA, 1762-L24BWA,
1762-L40AWA, 1762-L40BWA,
1762-L24AWAR, 1762-L24BWAR,
1762-L40AWAR, and 1762-L40BWAR).

Publication 1762-UM001H-EN-P - June 2015

MCR

Line Terminals: Connect to 24V dc terminals of
Power Supply (1762-L24BXB, 1762-L40BXB,
1762-L24BXBR, and 1762-L40BXBR).

24V dc
I/O
Circuits

Install Your Controller

2-11

Schematic (Using ANSI/CSA Symbols)
L1

230V ac

L2

Disconnect
MCR

Fuse

Isolation
Transformer
X1

115V ac or
X2
230V ac
Fuse

Operation of either of these contacts will
remove power from the external I/O
circuits, stopping machine motion.
Emergency-Stop
Push Button
Overtravel
Limit Switch

230V ac
Output
Circuits

Master Control Relay (MCR)
Cat. No. 700-PK400A1
Suppressor
Cat. No. 700-N24

Start

Stop

MCR
Suppr.
MCR
MCR

dc Power Supply. Use
NEC Class 2 for UL
Listing.

_

(Lo)

(Hi)

Line Terminals: Connect to terminals of Power
Supply (1762-L24AWA, 1762-L24BWA,
1762-L40AWA, 1762-L40BWA, 1762-L24AWAR,
1762-L24BWAR, 1762-L40AWAR, and
1762-L40BWAR).

+

115V ac or
230V ac
I/O Circuits

MCR

24 V dc
I/O
Circuits

Line Terminals: Connect to 24V dc terminals of
Power Supply (1762-L24BXB, 1762-L40BXB,
1762-L24BXBR, and 1762-L40BXBR).

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Install a Memory Module or
Real-time Clock

1. Remove the memory module port cover.

2. Align the connector on the memory module with the connector pins on
the controller.

3. Firmly seat the memory module into the controller.

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2-13

Controller Mounting
Dimensions

C

C

A
A

B

B

1762-L40AWA, 1762-L40BWA, 1762-L40BXB
1762-L40AWAR, 1762-L40BWAR, 1762-L40BXBR

1762-L24AWA, 1762-L24BWA, 1762-L24BXB
1762-L24AWAR, 1762-L24BWAR, 1762-L24BXBR

Table 2.1 Controller Dimensions
Dimension

1762-L24AWA
1762-L24AWAR

1762-L24BWA
1762-L24BXB
1762-L24BWAR 1762-L24BXBR

1762-L40AWA
1762-L40BWA
1762-L40AWAR 1762-L40BWAR

A

90 mm (3.5 in.)

90 mm (3.5 in.)

B

110 mm (4.33 in.)

160 mm (6.30 in.)

C

87 mm (3.43 in.)

87 mm (3.43 in.)

The controller mounts horizontally, with the expansion I/O extending to the
right of the controller. Allow 50 mm (2 in.) of space on all sides of the
controller system for adequate ventilation. Maintain spacing from enclosure
walls, wireways, and adjacent equipment, as shown below.

MicroLogix
1200

1762 I/O

Side

1762 I/O

Top

1762 I/O

Controller and
Expansion I/O Spacing

1762-L40BXB
1762-L40BXBR

Side

Bottom

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Mount the Controller

MicroLogix 1200 controllers are suitable for use in an industrial environment
when installed in accordance with these instructions. Specifically, this
equipment is intended for use in clean, dry environments (Pollution degree
2(1)) and to circuits not exceeding Over Voltage Category II(2) (IEC
60664-1).(3)

ATTENTION

Do not remove the protective debris shield until after
the controller and all other equipment in the panel
near the controller are mounted and wiring is
complete. Once wiring is complete, remove
protective debris shield. Failure to remove shield
before operating can cause overheating.

debris shield

ATTENTION

TIP

Electrostatic discharge can damage semiconductor
devices inside the controller. Do not touch the
connector pins or other sensitive areas.

For environments with greater vibration and shock
concerns, use the panel mounting method described
on page 2-16, rather than DIN rail mounting.

(1) Pollution Degree 2 is an environment where, normally, only non-conductive pollution occurs except that
occasionally a temporary conductivity caused by condensation shall be expected.
(2) Over Voltage Category II is the load level section of the electrical distribution system. At this level transient
voltages are controlled and do not exceed the impulse voltage capability of the product’s insulation.
(3) Pollution Degree 2 and Over Voltage Category II are International Electrotechnical Commission (IEC)
designations.

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2-15

DIN Rail Mounting
The maximum extension of the latch is 14 mm (0.55 in.) in the open position.
A flat-blade screwdriver is required for removal of the controller. The
controller can be mounted to EN50022-35x7.5 or EN50022-35x15 DIN rails.
DIN rail mounting dimensions are shown below.

27.5 mm
(1.08 in.)
90 mm
(3.5 in.)

27.5 mm
(1.08 in.)

To install your controller on the DIN rail:
1. Mount your DIN rail. (Make sure that the placement of the controller
on the DIN rail meets the recommended spacing requirements,
see Controller and Expansion I/O Spacing on page 2-13. Refer to the
mounting template inside the back cover of this document.)
2. Close the DIN latch, if it is open.
3. Hook the top slot over the DIN rail.
4. While pressing the controller down against the top of the rail, snap the
bottom of the controller into position.
5. Leave the protective debris shield attached until you are finished wiring
the controller and any other devices.
To remove your controller from the DIN rail:
1. Place a flat-blade screwdriver in the DIN rail latch at the bottom of the
controller.
2. Holding the controller, pry downward on the latch until the latch locks
in the open position.
3. Repeat steps 1 and 2 for the second DIN rail latch.
4. Unhook the top of the DIN rail slot from the rail.
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open

closed

Panel Mounting
Mount to panel using #8 or M4 screws. To install your controller using
mounting screws:
1. Remove the mounting template from inside the back cover of the
MicroLogix 1200 Programmable Controllers Installation Instructions,
publication 1762-IN006.
2. Secure the template to the mounting surface. (Make sure your controller
is spaced properly. See Controller and Expansion I/O Spacing on page
2-13.)
3. Drill holes through the template.
4. Remove the mounting template.
5. Mount the controller.
6. Leave the protective debris shield in place until you are finished wiring
the controller and any other devices.
Debris Shield
Mounting Template

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2-17

1762 Expansion I/O
Dimensions

A

C
B

Dimension

Mount 1762
Expansion I/O

Expansion I/O Module

A

90 mm (3.5 in.)

B

40 mm (1.57 in.)

C

87 mm (3.43 in.)

ATTENTION

During panel or DIN rail mounting of all devices, be
sure that all debris (metal chips, wire stands) is kept
from falling into the module. Debris that falls into the
module could cause damage when the module is
under power.

DIN Rail Mounting
The module can be mounted using the following DIN rails:
• 35 x 7.5 mm (EN 50 022 - 35 x 7.5), or
• 35 x 15 mm (EN 50 022 - 35 x 15).
Before mounting the module on a DIN rail, close the DIN rail latch. Press the
DIN rail mounting area of the module against the DIN rail. The latch
momentarily opens and locks into place.

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Use DIN rail end anchors (Allen-Bradley part number 1492-EA35 or
1492-EAH35) for vibration or shock environments. The following illustration
shows the location of the end anchors.

End Anchor

End Anchor

TIP

TIP

1762 expansion I/O must be mounted horizontally as
illustrated.
For environments with greater vibration and shock
concerns, use the panel mounting method described
below, instead of DIN rail mounting.

Mount on Panel
Use the dimensional template shown below to mount the module. The
preferred mounting method is to use two M4 or #8 panhead screws per
module. Mounting screws are required on every module.

For more than 2 modules: (number of modules - 1) x 40 mm (1.58 in.)

A = 95.86mm (3.774 in.)
1762-L24AWA, 1762-L24BWA, 1762-L24BXB
1762-L24AWAR, 1762-L24BWAR, 1762-L24BXBR
B = 145.8 mm (5.739 in.)
1762-L40AWA, 1762-L40BWA, 1762-L40BXB
1762-L40AWAR, 1762-L40BWAR, 1762-L40BXBR

Publication 1762-UM001H-EN-P - June 2015

A
B

40.4
(1.59)

1762 I/O

MicroLogix
1200

1762 I/O

100 90
(3.94) (3.54)

40.4
(1.59)

1762 I/O

14.5
(0.57)

NOTE: All dimensions are in mm (inches).
Hole spacing tolerance: ±0.4 mm (0.016 in.).

Install Your Controller

Connect Expansion I/O

2-19

The expansion I/O module is attached to the controller or another I/O
module by means of a flat ribbon cable after mounting, as shown below.

Pull Loop

TIP

TIP

ATTENTION

Use the pull loop on the connector to disconnect
modules. Do not pull on the ribbon cable.

Up to six expansion I/O modules can be connected
to a controller depending upon the power supply
loading.
Remove power before removing or inserting an I/O
module. When you remove or insert a module with
power applied, an electrical arc may occur. An
electrical arc can cause personal injury or property
damage by:
• sending an erroneous signal to your system’s field
devices, causing the controller to fault
• causing an explosion in a hazardous environment
Electrical arcing causes excessive wear to contacts on
both the module and its mating connector. Worn
contacts may create electrical resistance, reducing
product reliability.

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Install Your Controller

WARNING

EXPLOSION HAZARD
In Class I, Division 2 applications, the bus connector
must be fully seated and the bus connector cover
must be snapped in place.
In Class I, Division 2 applications, all modules must
be mounted in direct contact with each other as
shown on page 2-19. If DIN rail mounting is used, an end
stop must be installed ahead of the controller and after the
last 1762 I/O module.

Publication 1762-UM001H-EN-P - June 2015

Chapter

3

Wire Your Controller

This chapter describes how to wire your controller and expansion I/O. Topics
include:
•
•
•
•
•
•
•

wire requirements
using surge suppressors
grounding the controller
wiring diagrams
sinking and sourcing wiring diagrams
controller I/O wiring
expansion I/O wiring

Wire Requirements
ATTENTION

ATTENTION

Before you install and wire any device, disconnect
power to the controller system.

Calculate the maximum possible current in each
power and common wire. Observe all electrical
codes dictating the maximum current allowable for
each wire size. Current above the maximum ratings
may cause wiring to overheat, which can cause
damage.
United States Only: If the controller is installed
within a potentially hazardous environment, all
wiring must comply with the requirements stated in
the National Electrical Code 501-4 (b).

• Allow for at least 50 mm (2 in) between I/O wiring ducts or terminal
strips and the controller.
• Route incoming power to the controller by a path separate from the
device wiring. Where paths must cross, their intersection should be
perpendicular.

1

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3-2

Wire Your Controller

TIP

Do not run signal or communication wiring and
power wiring in the same conduit. Wires with
different signal characteristics should be routed by
separate paths.

• Separate wiring by signal type. Bundle wiring with similar electrical
characteristics together.
• Separate input wiring from output wiring.
• Label wiring to all devices in the system. Use tape, shrink-tubing, or
other dependable means for labeling purposes. In addition to labeling,
use colored insulation to identify wiring based on signal characteristics.
For example, you may use blue for dc wiring and red for ac wiring.
Table 3.1 Wire Requirements
Wire Type

Wire Size (2 wire maximum per terminal screw)(1)

Solid

Cu-90 °C (194 °F)

#14 to #22 AWG

Stranded

Cu-90 °C (194 °F)

#16 to #22 AWG

(1) Wiring torque = 0.791 Nm (7 lb-in) rated

Wire without Spade Lugs
When wiring without spade lugs, it is recommended to keep the finger-safe
covers in place. Loosen the terminal screw and route the wires through the
opening in the finger-safe cover. Tighten the terminal screw making sure the
pressure plate secures the wire.

Finger-Safe Cover

Publication 1762-UM001H-EN-P - June 2015

Wire Your Controller

3-3

Wire with Spade Lugs
The diameter of the terminal screw head is 5.5 mm (0.220 in.). The input and
output terminals of the MicroLogix 1200 controller are designed for a 6.35
mm (0.25 in.) wide spade (standard for #6 screw for up to 14 AWG) or a 4
mm (metric #4) fork terminal.
When using spade lugs, use a small, flat-blade screwdriver to pry the
finger-safe cover from the terminal blocks as shown below. Then loosen the
terminal screw.

Use Surge Suppressors

Because of the potentially high current surges that occur when switching
inductive load devices, such as motor starters and solenoids, the use of some
type of surge suppression to protect and extend the operating life of the
controllers output contacts is required. Switching inductive loads without
surge suppression can significantly reduce the life expectancy of relay contacts.
By adding a suppression device directly across the coil of an inductive device,
you prolong the life of the output or relay contacts. You also reduce the effects
of voltage transients and electrical noise from radiating into adjacent systems.

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3-4

Wire Your Controller

The following diagram shows an output with a suppression device. We
recommend that you locate the suppression device as close as possible to the
load device.
+dc or L1
Suppression
Device

VAC/DC
Out 0
Out 1
ac or dc
Outputs

Out 2
Out 3

Load

Out 4
Out 5
Out 6
Out 7
COM

dc COM or L2

If the outputs are dc, we recommend that you use an 1N4004 diode for surge
suppression, as shown below. For inductive dc load devices, a diode is suitable.
A 1N4004 diode is acceptable for most applications. A surge suppressor can
also be used. See Table 3.2 for recommended suppressors. As shown below,
these surge suppression circuits connect directly across the load device.
+24V dc
VAC/DC
Out 0
Out 1
Out 2
Out 3
Relay or Solid
State dc Outputs Out 4
Out 5
Out 6
Out 7 24V dc common
COM

IN4004 Diode
(A surge suppressor
can also be used.)

Suitable surge suppression methods for inductive ac load devices include a
varistor, an RC network, or an Allen-Bradley surge suppressor, all shown
below. These components must be appropriately rated to suppress the
switching transient characteristic of the particular inductive device. See the
table on page 3-5 for recommended suppressors.
Surge Suppression for Inductive ac Load Devices

Output Device

Output Device

Output Device

Surge
Suppressor
Varistor
Publication 1762-UM001H-EN-P - June 2015

RC Network

Wire Your Controller

3-5

Recommended Surge Suppressors
Use the Allen-Bradley surge suppressors shown in the following table for use
with relays, contactors, and starters.
Table 3.2 Recommended Surge Suppressors
Device
Coil Voltage

Suppressor Catalog
Number

Bulletin 509 Motor Starter
Bulletin 509 Motor Starter

120V ac
240V ac

599-K04(1)
599-KA04(1)

Bulletin 100 Contactor
Bulletin 100 Contactor

120V ac
240V ac

199-FSMA1(2)
199-FSMA2(2)

Bulletin 709 Motor Starter

120V ac

1401-N10(2)

Bulletin 700 Type R, RM Relays

ac coil

None Required

Bulletin 700 Type R Relay
Bulletin 700 Type RM Relay

12V dc
12V dc

199-FSMA9

Bulletin 700 Type R Relay
Bulletin 700 Type RM Relay

24V dc
24V dc

199-FSMA9

Bulletin 700 Type R Relay
Bulletin 700 Type RM Relay

48V dc
48V dc

199-FSMA9

Bulletin 700 Type R Relay
Bulletin 700 Type RM Relay

115-125V dc
115-125V dc

199-FSMA10

Bulletin 700 Type R Relay
Bulletin 700 Type RM Relay

230-250V dc
230-250V dc

199-FSMA11

Bulletin 700 Type N, P, or PK Relay

150V max, ac or dc

700-N24(2)

Miscellaneous electromagnetic
devices limited to 35 sealed VA

150V max, ac or dc

700-N24(2)

(1) Varistor – Not recommended for use on relay outputs.
(2) RC Type – Do not use with Triac outputs.

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Wire Your Controller

Ground the Controller

ATTENTION

In solid-state control systems, grounding and wire routing helps limit the
effects of noise due to electromagnetic interference (EMI). Run the ground
connection from the ground screw of the controller to the ground bus prior to
connecting any devices. Use AWG #14 wire. For AC-powered controllers, this
connection must be made for safety purposes.

All devices connected to the RS-232 channel must be referenced to controller ground, or
be floating (not referenced to a potential other than ground). Failure to follow this
procedure may result in property damage or personal injury.
• For 1762-L24BWA, 1762-L40BWA, 1762-L24BWAR, and 1762-L40BWAR controllers:
The COM of the sensor supply is also connected to chassis ground internally. The
24V dc sensor power source should not be used to power output circuits. It should
only be used to power input devices.
• For 1762-L24BXB, 1762-L40BXB, 1762-L24BXBR, and 1762-L40BXBR controllers:
The VDC NEUT or common terminal of the power supply is also connected to
chassis ground internally.
This product is intended to be mounted to a well grounded mounting surface
such as a metal panel. Refer to the Industrial Automation Wiring and
Grounding Guidelines, publication 1770-4.1, for additional information.
Additional grounding connections from the mounting tab or DIN rail, if used,
are not required unless the mounting surface cannot be grounded.

TIP

Use all four mounting positions for panel mounting
installation.

Grounding stamping

ATTENTION

Publication 1762-UM001H-EN-P - June 2015

Remove the protective debris strip before applying
power to the controller. Failure to remove the strip
may cause the controller to overheat.

Wire Your Controller

The following illustrations show the wiring diagrams for the MicroLogix 1200
controllers. Controllers with dc inputs can be wired as either sinking or
sourcing inputs. (Sinking and sourcing does not apply to ac inputs.) Refer to
Sinking and Sourcing Wiring Diagrams on page 3-12
The controller terminal block layouts are shown below. The shading on the
labels indicates how the terminals are grouped. A detail of the groupings is
shown in the table following the terminal block layouts.

TIP

This
symbol denotes a protective earth ground
terminal which provides a low impedance path
between electrical circuits and earth for safety
purposes and provides noise immunity
improvement. This connection must be made for
safety purposes on ac-powered controllers.
This
symbol denotes a functional earth ground
terminal which provides a low impedance path
between electrical circuits and earth for non-safety
purposes, such as noise immunity improvement.

Terminal Block Layouts
Figure 3.1 1762-L24AWA and 1762-L24AWAR
Group 0
COM
1

IN 5

NC

COM
0

VAC
L1

VAC OUT 0 OUT 1 OUT 2
NEUT

IN 4

IN 6

IN 9

IN 11

IN 8 IN 10

IN 13

IN 12

VAC OUT 5 OUT 6 OUT 8
DC3

G ro
up

4

VAC OUT 3 OUT 4 VAC OUT 7 OUT 9
DC 2
DC 4

2

VAC
DC 1

1

0

VAC
DC 0

IN 3

G ro
up

IN 1

IN 7

3

IN 2

G ro
up

Outputs

IN 0

Group 1

G ro
up

NC

Inputs

G ro
up

Wiring Diagrams

3-7

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3-8

Wire Your Controller

Figure 3.2 1762-L24BWA and 1762-L24BWAR
Group 0

IN 1

IN 3

IN 5
IN 4

IN 6

VAC VAC
L1 NEUT OUT 0 OUT 1 OUT 2
VAC VAC
DC 0 DC 1

IN 8

IN 10

IN 13

IN 12

VAC
DC 3 OUT 5 OUT 6 OUT 8

VAC
VAC
OUT 7 OUT 9
OUT 3 OUT 4
DC 2
DC 4

3
up

2
up

1
G ro

G ro

up

0
up
G ro

IN 9 IN 11

G ro

Outputs

IN 7

4

24 COM
COM
0

Group 1
COM
1

IN 2

up

Inputs

IN 0

G ro

+24
VDC

The 24V dc sensor supply of the 1762-L24BWA and
1762-L24BWAR should not be used to power output
circuits. It should only be used to power input devices (for
example sensors and switches). See Master Control Relay
on page 2-8 for information on MCR wiring in output
circuits.

ATTENTION

Figure 3.3 1762-L24BXB and 1762-L24BXBR
Group 1

Group 0
IN 0

COM
0

IN 11

IN 13

IN 3

IN 4

IN 6

IN 8 IN 10

IN 12

OUT
0

OUT
1

OUT
2

OUT
4

OUT
6

OUT
8

VDC
2

OUT
3

OUT
5

VAC
DC 3

COM
2

OUT
7

up

1

G ro

up
G ro

OUT
9

3

VAC
DC 1

0
up

IN 9

IN 1

VAC
DC 0

G ro

IN 7

2

+24 VDC
VDC NEUT

IN 5

up

NC

IN 2

G ro

NC

COM
1

Figure 3.4 1762-L40AWA and 1762-L40AWAR

VAC
NEUT

OUT
0

OUT
1

OUT
2

OUT
3

IN 20

IN 22

IN 9 IN 11

IN 13

IN 15

IN 17

IN 19

IN 21

OUT
5

OUT
8

OUT
10

VAC
DC 5

OUT
13

OUT
15

OUT
4

3

VAC
DC 2

2

1

0
up

up
G ro

G ro

VAC
DC 1

VAC
DC 3

IN 18

OUT
7
OUT
6

OUT
9

VAC
DC 4

OUT
11

OUT
12

5

VAC
L1

COM
2

IN 16

up

IN 6

IN 14

G ro

IN 4

IN 12

4

IN 3

IN 10

up

IN 1

IN 8

G ro

IN 7

COM
0

VAC
DC 0

Publication 1762-UM001H-EN-P - June 2015

IN 5

up

Outputs

IN 2

G ro

NC

IN 0

up

NC

Inputs

Group 2

Group 1
COM
1

G ro

Group 0

OUT
14

IN 23

Wire Your Controller

3-9

Figure 3.5 1762-L40BWA and 1762-L40BWAR

G ro

G ro

COM
2

IN 9

OUT
5

VAC
DC 3

OUT
4

OUT
3

IN 11

IN 13

OUT
8

OUT
7

VAC
DC 4

OUT
6

IN 16

IN 15

OUT
10

OUT
9

IN 18

IN 17

VAC
DC 5
OUT
11

IN 20 IN 22

IN 19

IN 21 IN 23

OUT
15

OUT
13

OUT OUT
12
14

up
5

OUT
2

VAC
DC 2

VAC
DC 1

up
1

up
0

VAC
DC 0

OUT
1

IN 6

IN 14

G ro

OUT
0

IN 4

IN 12

up
4

VAC VAC
L1 NEUT

Outputs

IN 3

IN 8 IN 10

up
3

IN 1

IN 7

up
2

24
COM
COM
0

IN 5

G ro

IN 0

Group 2

G ro

Inputs

Group 1

COM
IN 2
1

G ro

Group 0
+24
VDC

The 24V dc sensor supply of the 1762-L40BWA and
1762-L40BWAR should not be used to power output
circuits. It should only be used to power input devices (for
example sensors and switches). See Master Control Relay
on page 2-8 for information on MCR wiring in output
circuits.

ATTENTION

Figure 3.6 1762-L40BXB and 1762-L40BXBR

VDC
2

COM
2

IN 9

OUT
6

OUT
4

OUT
5

OUT
3

1

VAC
DC 1

OUT
2

G ro
up

G ro
up

0

VAC
DC 0

OUT
1

IN 6

IN 8 IN 10

IN 12

IN 11

OUT
8

OUT
7

IN 13

COM
2

OUT
9

IN 14

IN 15

OUT
10

VAC
DC 3

IN 16

IN 17

VAC
DC 4
OUT
11

IN 18

IN 20 IN 22

IN 19

OUT
13

IN 21 IN 23

OUT
15

OUT OUT
12
14

4

OUT
0

IN 4

IN 7

G ro
up

+24
VDC
VDC NEUT

IN 3

IN 5

3

Outputs

IN 1

COM
1

G ro
up

COM
0

NC

Group 2

Group 1

IN 2

2

Inputs

IN 0

G ro
up

Group 0
NC

Terminal Groupings
Table 3.3 Input Terminal Grouping
Controller
1762-L24AWA
1762-L24AWAR
1762-L24BWA
1762-L24BWAR
1762-L24BXB
1762-L24BXBR
1762-L40AWA
1762-L40AWAR

Input Group
Group 0
Group 1
Group 0
Group 1
Group 0
Group 1
Group 0
Group 1
Group 2

Inputs
Common Terminal
AC COM 0
AC COM 1
DC COM 0
DC COM 1
DC COM 0
DC COM 1
AC COM 0
AC COM 1
AC COM 2

Input Terminal
I/0 through I/3
I/4 through I/13
I/0 through I/3
I/4 through I/13
I/0 through I/3
I/4 through I/13
I/0 through I/3
I/4 through I/7
I/8 through I/23

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Wire Your Controller

Table 3.3 Input Terminal Grouping
Controller
1762-L40BWA
1762-L40BWAR

1762-L40BXB
1762-L40BXBR

Input Group
Group 0
Group 1
Group 2
Group 0
Group 1
Group 2

Inputs
Common Terminal
DC COM 0
DC COM 1
DC COM 2
DC COM 0
DC COM 1
DC COM 2

Input Terminal
I/0 through I/3
I/4 through I/7
I/8 through I/23
I/0 through I/3
I/4 through I/7
I/8 through I/23

Table 3.4 Output Terminal Grouping
Controller

1762-L24AWA
1762-L24AWAR

1762-L24BWA
1762-L24BWAR

1762-L24BXB
1762-L24BXBR

1762-L40AWA
1762-L40AWAR

1762-L40BWA
1762-L40BWAR

Publication 1762-UM001H-EN-P - June 2015

Output
Group
Group 0
Group 1
Group 2
Group 3
Group 4
Group 0
Group 1
Group 2
Group 3
Group 4
Group 0
Group 1
Group 2
Group 3

Voltage
Terminal
VAC/VDC 0
VAC/VDC 1
VAC/VDC 2
VAC/VDC 3
VAC/VDC 4
VAC/VDC 0
VAC/VDC 1
VAC/VDC 2
VAC/VDC 3
VAC/VDC 4
VAC/VDC 0
VAC/VDC 1
VDC 2, VDC
COM 2
VAC/VDC 3

Group 0
Group 1
Group 2
Group 3
Group 4

VAC/VDC 0
VAC/VDC 1
VAC/VDC 2
VAC/VDC 3
VAC/VDC 4

Group 5

VAC/VDC 5

Group 0
Group 1
Group 2
Group 3
Group 4

VAC/VDC 0
VAC/VDC 1
VAC/VDC 2
VAC/VDC 3
VAC/VDC 4

Group 5

VAC/VDC 5

Outputs
Output
Terminal
O/0
O/1
O/2 through O/3
O4 through O/5
O/6 through O/9
O/0
O/1
O/2 through O/3
O/4 through O/5
O/6 through O/9
O/0
O/1
O/2 through O/6

Description

Isolated Relay
outputs

Isolated Relay
outputs
Isolated Relay
outputs

Isolated FET
outputs
O/7 through O/9 Isolated Relay
outputs
O/0
O/1
O/2 through O/3
Isolated Relay
O/4 through O/7
outputs
O/8 through
O/11
O/12 through
O/15
O/0
O/1
O/2 through O/3
Isolated Relay
O/4 through O/7
outputs
O/8 through
O/11
O/12 through
O/15

Wire Your Controller

3-11

Table 3.4 Output Terminal Grouping
Controller
Output
Group
Group 0
Group 1
Group 2
1762-L40BXB
1762-L40BXBR

Group 3

Voltage
Terminal
VAC/VDC 0
VAC/VDC 1
VDC 2, VDC
COM 2
VAC/VDC 3

Group 4

VAC/VDC 4

Outputs
Output
Terminal
O/0
O/1
O/2 through O/9
O/10 through
O/11
O/12 through
O/15

Description
Isolated Relay
outputs
Isolated FET
outputs
Isolated Relay
outputs

Publication 1762-UM001H-EN-P - June 2015

3-12

Wire Your Controller

Sinking and Sourcing
Wiring Diagrams

Any of the MicroLogix 1200 DC embedded input groups can be configured as
sinking or sourcing depending on how the DC COM is wired on the group.
Refer to pages 3-13 through 3-17 for sinking and sourcing wiring diagrams.
Type

Definition

Sinking Input

The input energizes when high-level voltage is applied to the input
terminal (active high). Connect the power supply VDC (-) to the input
group’s COM terminal.

Sourcing Input

The input energizes when low-level voltage is applied to the input
terminal (active low). Connect the power supply VDC (+) to the input
group’s COM terminal.

ATTENTION

The 24V dc sensor power source must not be used to
power output circuits. It should only be used to
power input devices (for example sensors and
switches). See Master Control Relay on page 2-8 for
information on MCR wiring in output circuits.

1762-L24AWA, 1762-L24BWA, 1762-L24BXB, 1762-L24AWAR,
1762-L24BWAR and 1762-L24BXBR Wiring Diagrams

TIP

In the following diagrams, lower case alphabetic
subscripts are appended to common-terminal
connections to indicate that different power sources
may be used for different isolated groups, if desired.

Figure 3.7 1762-L24AWA and 1762-L24AWAR Input Wiring Diagram (1)

L1a

L1b
L2b

NC
NC

COM
0

IN 0

IN 2
IN 1

COM
1
IN 3

IN 5
IN 4

IN 7
IN 6

IN 9
IN 8

IN 11

IN 10

IN 13

IN 12

L2a
L1a
(1)

Publication 1762-UM001H-EN-P - June 2015

“NC” terminals are not intended for use as connection points.

L1b

Wire Your Controller

3-13

Figure 3.8 1762-L24BWA and 1762-L24BWAR Sinking Input Wiring Diagram
-DCb
+DCa

+DC

+24
VDC

+DCb

IN 0

24
COM COM 0

IN 2 COM 1

IN 1

IN 3

IN 5

IN 4

IN 7

IN 6

IN 9

IN 8

IN 11

IN 10

IN 13

IN 12

+DCb
-DC

-DCa
+DCa

Figure 3.9 1762-L24BWA and 1762-L24BWAR Sourcing Input Wiring Diagram
+DCb
-DCa

24V dc Sensor Power

-DCb

+DC

+24
VDC

IN 0

24
COM COM 0

IN 1

IN 2 COM 1
IN 3

IN 4

IN 5

IN 7

IN 6

IN 8

IN 9

IN 11

IN 10

IN 13

IN 12

-DCb
-DC +DCa

-DCa

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Wire Your Controller

Figure 3.10 1762-L24BXB and 1762-L24BXBR Sinking Input Wiring Diagram
-DCb

+DCa

NOT
USED

IN 0

NOT COM 0
USED

+DCb

IN 2 COM 1

IN 1

IN 3

IN 5

IN 4

IN 7

IN 6

IN 9

IN 8

IN 11

IN 10

IN 13

IN 12

+DCb
-DCa

+DCa

Figure 3.11 1762-L24BXB and 1762-L24BXBR Sourcing Input Wiring Diagram
-DCa

NOT
USED

0

+DCb

IN 2

NOT COM0
USED

IN 1

+DCa

-DCa

-DCb

IN 5

COM1

IN 3

IN 4

IN 7

IN 6

IN 9

IN 8

IN 11

IN 10

IN 13

IN 12

-DCb

Figure 3.12 1762-L24AWA, 1762-L24BWA, 1762-L24AWAR, and 1762-L24BWAR
Output Wiring Diagram
-DCa

L2a

L2b

L1c

L2c

L2d

L2
CR

CR

L1

VAC
L1

VAC OUT 0 OUT 1 OUT 2
NEUT
VAC
DC 0

VAC
DC 1

VAC
DC 2

VAC OUT 5 OUT 6 OUT 8
DC 3

OUT 3 OUT 4

VAC
DC 4

CR

OUT 7 OUT 9

CR

L2d
+DCa

Publication 1762-UM001H-EN-P - June 2015

L1a

L1b

L2b

L2c

L1d

Wire Your Controller

3-15

Figure 3.13 1762-L24BXB and 1762-L24BXBR Output Wiring Diagram
-DCa -DCb
+DC

+24
VDC

L1d

-DCc

L2d

-DC

OUT
0

VDC
NEUT

VAC
DC 0

OUT
1
VAC
DC 1

CR

CR

OUT
2

OUT
4

VDC
2

OUT
3

OUT
6

OUT
5

VAC
DC 3

COM
2

CR

+DCa +DCb

+DCc

OUT
8

OUT
7

OUT
9

CR

L2d

-DCc

1762-L40AWA, 1762-L40BWA, 1762-L40BXB, 1762-L40AWAR,
1762-L40BWAR and 1762-L40BXBR Wiring Diagrams
Figure 3.14 1762-L40AWA and 1762-L40AWAR Input Wiring Diagram
L1a

L1b

L1c

L2b
NC
NC

IN 0

COM
0

IN 2
IN 1

COM
1
IN 3

IN 5
IN 4

IN 7

IN 8 IN 10 IN 12 IN 14 IN 16 IN 18 IN 20

COM
IN 6
2

IN 22

IN 9 IN 11 IN 13 IN 15 IN 17 IN 19 IN 21 IN 23

L2a
L2c

L1a
L1b

L1c

Figure 3.15 1762-L40BWA and 1762-L40BWAR Sinking Input Wiring Diagram
-DCb
+DC

+DCa

+24
VDC

IN 0

+DCb
+DCc

24
COM

COM
0

-DC

-DCa

IN 2
IN 1

COM
1
IN 3

IN 5
IN 4

IN 7
IN 6

IN 8

COM
2

IN 10
IN 9

IN 12

IN 11

IN 14

IN 13

IN 16

IN 15

IN 18

IN 17

IN 20

IN 19

IN 22

IN 21

IN 23

+DCc
+DCa

+DCb

-DCc

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Wire Your Controller

Figure 3.16 1762-L40BWA and 1762-L40BWAR Sourcing Input Wiring Diagram
-DCb

+DCb
-DCa

-DCc

+DC

+24
VDC
24
COM

IN 0

COM
0

IN 1

-DC

COM
1

IN 2

IN 3

IN 5
IN 4

-DCa

IN 7
IN 6

IN 8

IN 10

COM
2

IN 9

-DCb

IN 12

IN 11

IN 14

IN 13

IN 16

IN 15

IN 18

IN 17

IN 20

IN 19

IN 22

IN 21

IN 23

-DCc

+DCa

+DCc

Figure 3.17 1762-L40BXB and 1762-L40BXBR Sinking Input Wiring Diagram
-DCb +DCb

+DCa

+DCc

NOT
USED
NOT
USED

IN 0

COM
0

COM
1

IN 2
IN 1

IN 3

IN 5
IN 4

IN 7
IN 6

IN 8

IN 10

COM
2

IN 12

IN 9 IN 11

IN 14

IN 13

IN 16

IN 15

IN 18

IN 17

IN 20

IN 19

IN 22

IN 21

IN 23

+DCc
+DCa

-DCa

+DCb -DCc

Figure 3.18 1762-L40BXB and 1762-L40BXBR Sourcing Input Wiring Diagram
+DCb
-DCb

-DCa

-DCc

NOT
USED
NOT
USED

IN 0

COM
0

+DCa

Publication 1762-UM001H-EN-P - June 2015

IN 2
IN 1

-DCa

COM
1
IN 3

IN 5
IN 4

IN 7
IN 6

IN 8

COM
2

IN 10
IN 9

IN 12

IN 11

IN 14

IN 13

IN 16

IN 15

IN 18

IN 17

IN 20

IN 19

IN 22

IN 21

IN 23

-DCc
-DCb

+DCc

Wire Your Controller

3-17

Figure 3.19 1762-L40AWA, 1762-L40BWA, 1762-L40AWAR, and 1762-L40BWAR
Output Wiring Diagram
L1d
L2a

L2b

L1f
L2d

L2c

L2f

L2e

L2
CR

L1

VAC VAC
L1 NEUT

OUT
0

VAC
DC 0

OUT
1

OUT
2

VAC
DC 2

VAC
DC 1

OUT
5

VAC
DC 3

OUT
4

OUT
3

OUT
8

VAC
DC 4

CR

OUT
10

OUT
9

VAC
DC 5

OUT OUT
12
14

CR

CR

L2f

L2e

L2d

L1c

OUT
15

OUT
13

OUT
11

CR

L2c
L1b

OUT
7

OUT
6

CR

L1a

CR

CR

L1e

Figure 3.20 1762-L40BXB and 1762-L40BXBR Output Wiring Diagram
-DCa

-DC

-DCc

-DCb

CR

+DC

+24
VDC

VDC
NEUT

OUT
0

VAC
DC 0

OUT
1
VAC
DC 1

VDC
2

OUT
4
OUT
3

CR

+DCa +DCb
+DCc

Controller I/O Wiring

OUT
8

OUT
6
OUT
5

+DCe

-DCe

CR

CR

OUT
2

-DCd

COM

OUT
10

CR

VAC
DC 4

OUT
7

OUT
9

CR

CR

CR

-DCc

-DCd

VAC
DC3

OUT
11

OUT
15

OUT
13
OUT
12

OUT
14

CR

-DCe

+DCd

Minimize Electrical Noise
Because of the variety of applications and environments where controllers are
installed and operating, it is impossible to ensure that all environmental noise
will be removed by input filters. To help reduce the effects of environmental
noise, install the MicroLogix 1200 system in a properly rated (NEMA)
enclosure. Make sure that the MicroLogix 1200 system is properly grounded.
A system may malfunction due to a change in the operating environment after
a period of time. We recommend periodically checking system operation,
particularly when new machinery or other noise sources are installed near the
Micrologix 1200 system.
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Wire Your Controller

Expansion I/O Wiring

The following sections show the discrete and analog expansion I/O wiring
diagrams.

Discrete Wiring Diagrams
Figure 3.21 1762-IA8 Wiring Diagram

L1
IN 0
IN 1
IN 2
IN 3
100/120V ac

IN 4
IN 5
IN 6
IN 7
AC
COM
AC
COM

L2

Common
connected
internally.

Figure 3.22 1762-IQ8 Wiring Diagram
+DC (sinking)
-DC (sourcing)

IN 0
IN 1
IN 2
IN 3
24V dc

IN 4
IN 5
IN 6
IN 7

-DC (sinking)
+DC (sourcing)

Publication 1762-UM001H-EN-P - June 2015

DC
COM
DC
COM

Common connected
internally.

Wire Your Controller

3-19

Figure 3.23 1762-IQ16 Wiring Diagram
+DC (Sinking)
-DC (Sourcing)
IN 0
IN 1
IN 2
IN 3
IN 4

24V dc

IN 5
IN 6
IN 7
DC
COM 0

+DC (Sinking)
-DC (Sourcing)

-DC (Sinking)
+DC (Sourcing)

IN 8
IN 9
IN 10
24V dc

IN 11
IN 12
IN 13
IN 14
IN 15

-DC (Sinking)
+DC (Sourcing)

DC
COM 1

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Wire Your Controller

Figure 3.24 1762-IQ32T Wiring Diagram

44920

Figure 3.25 1762-OA8 Wiring Diagram

OUT 0
CR

L2

CR

OUT 5

CR

OUT 6
OUT 7

Publication 1762-UM001H-EN-P - June 2015

L1

OUT 1

CR

OUT 3

CR

OUT 4

CR

OUT 2

VAC
1

L1

VAC
0

L2

Wire Your Controller

3-21

Figure 3.26 1762-OB8 Wiring Diagram

+DC

+VDC
CR

OUT 0

CR

OUT 2

OUT 1

CR

OUT 3

CR

OUT 4
OUT 5
CR

OUT 6

CR

OUT 7

24V dc (source)

DC COM
-DC

Figure 3.27 1762-OB16 Wiring Diagram

VDC+
CR

OUT 0

CR

OUT 2

+DC

OUT 1

CR

OUT 3

CR

OUT 4
OUT 5
CR

OUT 6

CR

OUT 7

CR

OUT 8

CR

OUT 9

CR

OUT 11

CR

OUT 13

24V dc (source)

OUT 10
OUT 12
OUT 14
OUT 15
DC COM
-DC

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Wire Your Controller

Figure 3.28 1762-OB32T Wiring Diagram

44925

Figure 3.29 1762-OV32T Wiring Diagram

44915

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Wire Your Controller

3-23

Figure 3.30 1762-OW8 Wiring Diagram

L1 VAC1 +

VAC-VDC 1
OUT 0
CR

L1 VAC2 +
L2 DC2 COM

OUT 1

CR

OUT3

CR

OUT 4

CR

L2 DC1 COM

OUT 2

VAC-VDC2
CR

OUT 5

CR

OUT 6
OUT 7

Figure 3.31 1762-OW16 Wiring Diagram

OUT 0
CR

L1

VAC-VDC
0
OUT 1

CR

OUT 3

CR

OUT 5

CR

L2

OUT 2
OUT 4

CR

OUT 6

CR

OUT 7

+DC

VAC-VDC
1
OUT 8
CR

OUT 9

CR

OUT 11

CR

OUT 13

CR

OUT 15

CR

-DC

OUT 10
OUT 12

CR

OUT 14

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Wire Your Controller

Figure 3.32 1762-OX6I Wiring Diagram

L1-0

L1 OR +DC

OUT0 N.C.

L1 OR +DC

OUT0 N.O.

CR

OUT1 N.C.

CR

L1-1
OUT1 N.O.

L2 OR -DC

L1-2
L2 OR -DC

L2 OR -DC

CR

L1 OR +DC

OUT2 N.C.
OUT2 N.O.

L1 OR +DC
L2 OR -DC

CR

L1 OR +DC

L1-3
OUT3 N.C.
OUT3 N.O.

L1-4
OUT4 N.C.

L1-5
CR

L1 OR +DC

OUT5 N.C.
OUT5 N.O.

Publication 1762-UM001H-EN-P - June 2015

CR

OUT4 N.O.

L2 OR -DC

L2 OR -DC

Wire Your Controller

3-25

Figure 3.33 1762-IQ8OW6 Wiring Diagram
+DC (Sinking)
-DC (Sourcing)
IN 0
IN 1
IN 2
IN 3
+DC (Sinking)
-DC (Sourcing)

IN 4

-DC (Sinking)
+DC (Sourcing)

DC
COM 0
IN 5

IN 6
IN 7
DC
COM 1

-DC (Sinking)
+DC (Sourcing)

VAC
VDC

L1 or +DC

OUT 0
CR

Connected Internally
VAC
VDC

L1 or +DC

OUT 1

CR

OUT 3

CR

OUT 5

CR

L2 or -DC

OUT 2
OUT 4

Analog Wiring
System Wiring Guidelines
Consider the following when wiring your analog modules:
• The analog common (COM) is not connected to earth ground inside the
module. All terminals are electrically isolated from the system.
• Channels are not isolated from each other.
• Use Belden 8761, or equivalent, shielded wire.
• Under normal conditions, the drain wire (shield) should be connected to
the metal mounting panel (earth ground). Keep the shield connection to
earth ground as short as possible.
• To ensure optimum accuracy for voltage type inputs, limit overall cable
impedance by keeping all analog cables as short as possible. Locate the
I/O system as close to your voltage type sensors or actuators as
possible.
• The module does not provide loop power for analog inputs. Use a
power supply that matches the input transmitter specifications.

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Wire Your Controller

1762-IF2OF2 Input Type Selection
Select the input type, current or voltage, using the switches located on the
module’s circuit board and the input type/range selection bits in the
Configuration Data File. Refer to MicroLogix 1200 and 1500 Programmable
Controllers Instruction Set Reference Manual, publication number
1762-RM001. You can access the switches through the ventilation slots on the
top of the module. Switch 1 controls channel 0; switch 2 controls channel 1.
The factory default setting for both switch 1 and switch 2 is Current. Switch
positions are shown below.

Ch0 Ch1

ON

Switch Location

1

2

Voltage (OFF)
Current (ON) Default

1762-IF2OF2 Output Type Selection
The output type selection, current or voltage, is made by wiring to the
appropriate terminals, Iout or Vout, and by the type/range selection bits in the
Configuration Data File. Refer to MicroLogix 1200 and 1500 Programmable
Controllers Instruction Set Reference Manual, publication number
1762-RM001.

ATTENTION

Publication 1762-UM001H-EN-P - June 2015

Analog outputs may fluctuate for less than a second
when power is applied or removed. This
characteristic is common to most analog outputs.
While the majority of loads will not recognize this
short signal, it is recommended that preventive
measures be taken to ensure that connected
equipment is not affected.

Wire Your Controller

3-27

1762-IF2OF2 Wiring
The following illustration shows the 1762-IF2OF2 analog expansion I/O
terminal block.
Figure 3.34 1762-IF2OF2 Terminal Block Layout

IN 0 (+)
IN 0 (-)
IN 1 (+)
IN 1 (-)
V Out 0
I Out 0
V Out 1
I Out 1
COM

Common connected
internally.

COM

Figure 3.35 Differential Sensor Transmitter Types

IN 0 (+)

Analog Sensor

IN 0 (-)
IN 1 (+)
IN 1 (-)

Load

I out 0
I out 1
V out 0
V out 1
COM
COM

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Wire Your Controller

Figure 3.36 Single-ended Sensor/Transmitter Types
2-Wire Transmitter
Power +
Supply(1)-

Transmitter

+

Module

-

IN +
IN COM

3-Wire Transmitter

Transmitter
Supply

Signal

Module

Power +
Supply(1)-

IN +
IN COM

4-Wire Transmitter
Power +
Supply(1)-

Transmitter
Supply
Signal

+
-

Module

+
-

IN +
IN COM

(1) All power supplies rated N.E.C. Class 2.

1762-IF4 Input Type Selection
Select the input type, current or voltage, using the switches located on the
module’s circuit board and the input type/range selection bits in the
Configuration Data File. Refer to MicroLogix 1200 and 1500 Programmable
Controllers Instruction Set Reference Manual, publication number
1762-RM001. You can access the switches through the ventilation slots on the
top of the module.

Ch0 Ch1

Switch Location

ON

ON

Voltage (OFF)

1

Publication 1762-UM001H-EN-P - June 2015

Ch2 Ch3

2

1

2

Current (ON Default)

Wire Your Controller

3-29

Figure 3.37 1762-IF4 Terminal Block Layout

IN 0 (+)
IN 0 (-)
IN 1 (+)
IN 1 (-)
IN 2 (+)
IN 2 (-)
IN 3 (+)
IN 3 (-)
COM

Commons internally connected.

COM

Figure 3.38 Differential Sensor Transmitter Types
IN 0 (+)

Analog Sensor

IN 0 (-)
IN 1 (+)
IN 1 (-)
IN 2 (+)
IN 2 (-)
IN 3 (+)
IN 3 (-)
COM
COM

TIP

Grounding the cable shield at the module end only
usually provides sufficient noise immunity.
However, for best cable shield performance, earth
ground the shield at both ends, using a 0.01µF
capacitor at one end to block AC power ground
currents, if necessary.

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Wire Your Controller

Figure 3.39 Sensor/Transmitter Types
2-Wire Transmitter
Power

Transmitter

+

+

-

Module

IN +

Supply (1) -

IN COM
Transmitter

3-Wire Transmitter

Supply

Signal

Power +
Supply(1) -

Module

IN +
IN COM

4-Wire Transmitter

Transmitter
Signal

Supply

Power +
Supply(1) -

+
-

+
-

Module
IN +

IN COM

(1) All power supplies rated N.E.C. Class 2.

1762-OF4 Output Type Selection
The output type selection, current or voltage, is made by wiring to the
appropriate terminals, Iout or Vout, and by the type/range selection bits in the
Configuration Data File.

1762-OF4 Terminal Block Layout

V out 0
I out 0
V out 1
I out 1
V out 2
I out 2
V out 3
I out 3
COM
COM

Publication 1762-UM001H-EN-P - June 2015

Commons connected internally

Wire Your Controller

3-31

1762-OF4 Wiring

I out 0

Current Load

I out 1
I out 2
I out 3

Voltage Load

V out 0
V out 1
V out 2
V out 3
COM
COM

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Wire Your Controller

Notes:

Publication 1762-UM001H-EN-P - June 2015

Chapter

4

Communication Connections
Introduction

This chapter describes how to communicate to your control system. The
method you use and cabling required to connect your controller depends on
what type of system you are employing. This chapter also describes how the
controller establishes communication with the appropriate network. Topics
include:
•
•
•
•
•
•

supported communication protocols
default communication configurations
using communications toggle push button
connecting to RS-232 port
connecting to DH-485 network
connecting to AIC+

MicroLogix 1200 controllers with the additional communications port
(1762-L24AWAR, 1762-L24BWAR, 1762-L24BXBR, 1762-L40AWAR,
1762-L40BWAR, 1762-L40BXBR) offer advanced communications options,
providing a clean, cost effective solution for applications requiring a network
connection and HMI.
The additional communications port (Programmer/HMI Port) enables two
communication devices to be connected to the controller simultaneously. For
example, it provides local connectivity of an operator interface or
programming terminal such as DF1 PanelView HMI, IBM-compatible
personal computer using RSLogix 500 programming software, or 1747-PSD
program storage device, and also allows the primary port (Channel 0) to be
connected to either a network, a modem, or an ASCII device such as a barcode
reader or weigh scale.

Supported Communication
Protocols

MicroLogix 1200 controllers support the following communication protocols
from the primary RS-232 communication channel, Channel 0:
•
•
•
•
•
•

DH-485
DF1 Full-duplex
DF1 Half-duplex
DF1 Radio Modem
Modbus Master and Slave
ASCII

The 1762-L24AWAR, 1762-L24BWAR, 1762-L24BXBR, 1762-L40AWAR,
1762-L40BWAR, and 1762-L40BXBR controllers are equipped with an

1

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4-2

Communication Connections

additional RS-232 communication channel called the Programmer/HMI Port,
which supports DH Full-duplex only. The controller cannot initiate messages
through this port. It can only respond to messages sent to it. All
communication parameters are fixed and cannot be changed by a user.
See Default Communication Configuration on page 4-2 for the configuration
settings.
For more information on MicroLogix 1200 communications, refer to the
MicroLogix 1200 and MicroLogix 1500 Programmable Controllers Instruction
Set Reference Manual, publication number 1762-RM001.

Default Communication
Configuration

The MicroLogix 1200 has the following default communication configuration.
The same default configuration is applied for both Channel 0 and the
Programmer/HMI Port (for 1762-LxxxxxR only). The configurations for the
Programmer/HMI Port are fixed and you cannot change them.

TIP

For Channel 0, the default configuration is present
when:
• The controller is powered-up for the first time.
• The communications toggle push button specifies
default communications (the DCOMM LED is on).
• An OS upgrade is completed.

See Appendix E for more information about communicating.
Table 4.1 DF1 Full-duplex Default Configuration Parameters

Publication 1762-UM001H-EN-P - June 2015

Parameter

Default

Baud Rate

19.2K

Parity

none

Source ID (Node Address)

1

Control Line

no handshaking

Stop Bits

1

Communication Connections

Use the Communications
Toggle Push Button

4-3

The Communications toggle push button is located on the processor under
the processor door (if installed), as shown below.
Use the Communications toggle push button to change from the user-defined
communication configuration to the default communications mode and back
on Channel 0. The parameters of the Programmer/HMI Port are fixed at the
default communications configuration. The Default Communications
(DCOMM) LED operates to show when the controller is in the default
communications mode (settings shown on page 4-2).

0
1

0
1

COM

COM

Communications toggle
push button

TIP

The Communications toggle push button must be
pressed and held for one second to activate.
The Communications toggle push button only affects
the communication configuration of Channel 0.

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Communication Connections

Connect to the RS-232 Port

There are two ways to connect the MicroLogix 1200 programmable controller
to your personal computer using the DF1 protocol: using a point-to-point
connection, or using a modem. Descriptions of these methods follow.

ATTENTION

All devices connected to the RS-232 channel must be
referenced to controller ground, or be floating (not
referenced to a potential other than ground). Failure
to follow this procedure may result in property
damage or personal injury.
• For 1762-L24BWA, 1762-L40BWA, 1762-L24BWAR
and 1762-L40BWAR controllers:
The COM of the sensor supply is also connected
to chassis ground internally. The 24V dc sensor
power source should not be used to power
output circuits. It should only be used to power
input devices.
• For 1762-L24BXB, 1762-L40BXB, 1762-L24BXBR
and 1762-L40BXBR controllers:
The VDC NEUT or common terminal of the
power supply is also connected to chassis ground
internally.

Table 4.2 Available Communication Cables

Publication 1762-UM001H-EN-P - June 2015

Communication Cables

Length

1761-CBL-PM02 series C or later

2 m (6.5 ft)

1761-CBL-HM02 series C or later

2 m (6.5 ft)

1761-CBL-AM00 series C or later

45 cm (17.7 in)

1761-CBL-AP00 series C or later

45 cm (17.7 in)

1761-CBL-PH02 series A or later

2 m (6.5 ft)

1761-CBL-AH02 series A or later

2 m (6.5 ft)

2707-NC8 series A or later

2 m (6.5 ft)

2707-NC9 series B or later

15 m (49.2 ft)

2707-NC10 series B or later

2 m (6.5 ft)

2707-NC11 series B or later

2 m (6.5 ft)

Communication Connections

4-5

Make a DF1 Point-to-Point Connection
You can connect the MicroLogix 1200 programmable controller to your
personal computer using a serial cable (1761-CBL-PM02) from your personal
computer’s serial port to the controller via Channel 0 and/or the
Programmer/HMI Port (for 1762-LxxxxxR only). The recommended
protocol for this configuration is DF1 Full-duplex.
We recommend using an Advanced Interface Converter (AIC+), catalog
number 1761-NET-AIC, as your optical isolator, as shown on the following
page. See page 4-13 for specific AIC+ cabling information.

MicroLogix 1200
Channel 0 or Programmer/HMI Port

Personal Computer

1761-CBL-AM00 or 1761-CBL-HM02(1)

TERM
A
B
COM
SHLD
CHS GND

TX

TX

TX

PWR

DC SOURCE
CABLE

1747-CP3 or 1761-CBL-AC00
24V dc
MicroLogix 1200 provides power to the AIC+ or an
external power supply may be used.
EXTERNAL

(1) Series C or higher cables are required.

Use a Modem
You can use modems to connect a personal computer to one MicroLogix 1200
controller (using DF1 Full-duplex protocol), to multiple controllers (using
DF1 Half-duplex protocol), or Modbus RTU Slave protocol via Channel 0, as
shown in the following illustration. (See Appendix E for information on types
of modems you can use with the micro controllers.
IMPORTANT

Do not attempt to use DH-485 protocol through
modems under any circumstance.

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4-6

Communication Connections

Personal Computer
Modem Cable
(straight-through)
MicroLogix 1200
Channel 0

Modem
Protocol Options
• DF1 Full-duplex protocol (to 1 controller)
• DF1 Half-duplex protocol (to multiple controllers)
• Modbus RTU Slave protocol

Optical Isolator
(recommended)
TERM
A
B
COM
SHLD
CHS GND

TX

TX

TX

PWR

DC SOURCE
CABLE

Modem

EXTERNAL

We recommend using an AIC+, catalog number 1761-NET-AIC, as your
optical isolator. See page 4-13 for specific AIC+ cabling information.

Isolated Modem Connection
Using an AIC+ to isolate the modem is illustrated below.
24V dc
MicroLogix 1200
MicroLogix 1200 provides power to the AIC+ or an external power Channel 0
supply may be used. See Appendix F, System Loading and Heat
Dissipation.
TERM
A
B
COM
SHLD
CHS GND

TX

TX

TX

1761-CBL-AM00 or 1761-CBL-HM02(1)
Modem

PWR

DC SOURCE
CABLE

EXTERNAL

User-supplied modem cable

(1) Series C or higher cables are required.

For additional information on connections using the AIC+, refer to the
Advanced Interface Converter (AIC+) User Manual, publication
1761-UM004.

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Communication Connections

4-7

Construct Your Own Modem Cable
If you construct your own modem cable, the maximum cable length is
15.24 m (50 ft) with a 25-pin or 9-pin connector. Refer to the following typical
pinout for constructing a straight-through cable:
DTE Device
(AIC+,
MicroLogix,
SLC, PLC)

DCE Device
(Modem,
PanelView)

9-Pin

25-Pin

9-Pin

3

TXD

TXD

2

3

2

RXD

RXD

3

2

5

GND

GND

7

5

1

DCD

DCD

8

1

4

DTR

DTR

20

4

6

DSR

DSR

6

6

8

CTS

CTS

5

8

7

RTS

RTS

4

7

Construct Your Own Null Modem Cable
If you construct your own null modem cable, the maximum cable length is
15.24 m (50 ft) with a 25-pin or 9-pin connector. Refer to the following typical
pinout:
DTE Device
(AIC+,
MicroLogix,
SLC, PLC)
9-Pin
3
TXD
2
RXD
5
GND
1
DCD
4
DTR
6
DSR
8
CTS
7
RTS

DCE Device
(Modem,
PanelView)

TXD
RXD
GND
DCD
DTR
DSR
CTS
RTS

25-Pin
2
3
7
8
20
6
5
4

9-Pin
3
2
5
1
4
6
8
7

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Communication Connections

Connect to a DF1 Half-duplex Network
Use the following diagram for DF1 Half-duplex Master-Slave protocol without
hardware handshaking.
SLC 5/03
processor

MicroLogix 1200

DF1
Master
CH0
(3)
(1)

CH0

0
1
COM

1761-CBL-AM00 or 1761-CBL-HM02(4)
1761-CBL-AP00 or 1761-CBL-PM02(4)
DF1 Slave

(2)

radio modem
or lease line

straight 9-25 pin cable

(3)

(2)

AIC+
(1)

straight 9-25
pin cable

MicroLogix 1200
radio
modem or
lease line CH0 to port 1
or port 2
1761-CBL-AM00 or
1761-CBL-HM02 to
1761-CBL-AP00 or
DF1
(4)
controller(4)
1761-CBL-PM02 to controller
Slave

MicroLogix 1200

0

CH0 to port 1
or port 2

0
1
COM

DF1 Slave
(3)

(1)

(2)

AIC+

1

COM

(3)

1761-CBL-AM00 or
1761-CBL-HM02 to
controller(4)

RS-485 DF1 Half-duplex
(1) DB-9 RS-232 port
(2) mini-DIN 8 RS-232 port
(3) RS-485 port
(4) Series C or higher cables are required.

Publication 1762-UM001H-EN-P - June 2015

RS-485 DF1 Half-duplex

(1)

(2)

AIC+

1761-CBL-AP00 or
1761-CBL-PM02 to
controller(4)

Communication Connections

Connect to a DH-485
Network

4-9

The following illustration shows how to connect to a DH-485 network.
MicroLogix 1200

MicroLogix DH-485 Network
PC

connection from port 1 or port 2
to MicroLogix Channel 0
1761-CBL-AM00
or 1761-CBL-HM02(4)
AIC+
(3)

PC to port 1
or port 2

(2)

TERM
A

COM
SHLD
CHS GND

TX

(1)

1761-CBL-AP00
or 1761-CBL-PM02

1761-CBL-AP00
or 1761-CBL-PM02(4)

B

TX

TX

PWR

DC SOURCE
CABLE

AIC+

EXTERNAL

(3)

(2)

TERM
A
B
COM
SHLD

24V dc
(user supply required if Port 2 is
not connected to a controller)

Belden, shielded,
twisted-pair cable
(see table below)

(1) DB-9 RS-232 port
(2) mini-DIN 8 RS-232 port
(3) RS-485 port
(4) Series C or higher cables are required.

CHS GND

TX

TX

(1)

TX

PWR

DC SOURCE
CABLE

EXTERNAL

1747-CP3
or 1761-CBL-AC00

24V dc
(user supplied)

Recommended Tools
To connect a DH-485 network, you need tools to strip the shielded cable and
to attach the cable to the AIC+ Advanced Interface Converter. We
recommend the following equipment (or equivalent):
Table 4.3 Working with Cable for DH-485 Network
Description

Part Number

Manufacturer

Shielded Twisted Pair Cable

#3106A or #9842

Belden

Stripping Tool

45-164

Ideal Industries

1/8” Slotted Screwdriver

Not Applicable

Not Applicable

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Communication Connections

DH-485 Communication Cable
The suggested DH-485 communication cable is either Belden #3106A or
#9842. The cable is jacketed and shielded with one or two twisted-wire pairs
and a drain wire.
One pair provides a balanced signal line and one additional wire is used for a
common reference line between all nodes on the network. The shield reduces
the effect of electrostatic noise from the industrial environment on network
communication.
The communication cable consists of a number of cable segments
daisy-chained together. The total length of the cable segments cannot exceed
1219 m (4000 ft). However, two segments can be used to extend the DH-485
network to 2438 m (8000 ft). For additional information on connections using
the AIC+, refer to the Advanced Interface Converter (AIC+) User Manual,
publication 1761-UM004.
When cutting cable segments, make them long enough to route them from one
AIC+ to the next, with sufficient slack to prevent strain on the connector.
Allow enough extra cable to prevent chafing and kinking in the cable.
Use these instructions for wiring the Belden #3106A or #9842 cable. (See
Cable Selection Guide on page 4-13 if you are using standard Allen-Bradley
cables.)

Connect the Communication Cable to the DH-485 Connector

TIP

We recommend a daisy-chained network. Do not
make the incorrect connection shown below:

Belden #3106A
or #9842

Connector

Belden #3106A or Belden #3106A or
#9842
#9842

Connector
Connector
Incorrect

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Communication Connections

4-11

Single Cable Connection
When connecting a single cable to the DH-485 connector, use the following
diagram.

6 Termination
5A
4B
3 Common
2 Shield
1 Chassis Ground

Orange with White Stripes
White with Orange Stripes

Shrink Tubing Recommended

Blue (#3106A) or
Blue with White Drain Wire
Stripes (#9842)

Multiple Cable Connection
When connecting multiple cables to the DH-485 connector, use the following
diagram.
to Previous Device
to Next Device

Table 4.4 Connections using Belden #3106A Cable
For This Wire/Pair
Connect This Wire

To This Terminal

Shield/Drain

Non-jacketed

Terminal 2 - Shield

Blue

Blue

Terminal 3 - (Common)

White/Orange

White with Orange Stripe

Terminal 4 - (Data B)

Orange with White Stripe

Terminal 5 - (Data A)

Table 4.5 Connections using Belden #9842 Cable
For This Wire/Pair
Connect This Wire

To This Terminal

Shield/Drain

Non-jacketed

Terminal 2 - Shield

Blue/White

White with Blue Stripe

Cut back - no connection(1)

Blue with White Stripe

Terminal 3 - (Common)

White with Orange Stripe

Terminal 4 - (Data B)

Orange with White Stripe

Terminal 5 - (Data A)

White/Orange

(1) To prevent confusion when installing the communication cable, cut back the white with blue stripe wire
immediately after the insulation jacket is removed. This wire is not used by DH-485.

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Communication Connections

Ground and Terminate the DH-485 Network
Only one connector at the end of the link must have Terminals 1 and 2
jumpered together. This provides an earth ground connection for the shield of
the communication cable.
Both ends of the network must have Terminals 5 and 6 jumpered together, as
shown below. This connects the termination impedance (of 120 ohm) that is
built into each AIC+ as required by the DH-485 specification.

End-of-Line Termination
Jumper

Jumper

Belden #3106A or #9842 Cable
1219 m (4000ft) Maximum
Jumper

Connect the AIC+

The AIC+, catalog number 1761-NET-AIC, enables a MicroLogix 1200 to
connect to a DH-485 network. The AIC+ has two RS-232 ports and one
isolated RS-485 port. Typically, there is one AIC+ for each MicroLogix 1200.
When two MicroLogix controllers are closely positioned, you can connect a
controller to each of the RS-232 ports on the AIC+.
The AIC+ can also be used as an RS-232 isolator, providing an isolation
barrier between the MicroLogix 1200 communications port and any
equipment connected to it (for example a personal computer or modem).
The following figure shows the external wiring connections and specifications
of the AIC+.
3
2
AIC+ Advanced Interface Converter
(1761-NET-AIC)

4
1

5

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Communication Connections

Item

Description

1

Port 1 - DB-9 RS-232, DTE

2

Port 2 - mini-DIN 8 RS-232 DTE

3

Port 3 - RS-485 Phoenix plug

4

DC Power Source selector switch
(cable = port 2 power source,
external = external power source connected to item 5)

5

Terminals for external 24V dc power supply and chassis ground

4-13

For additional information on connecting the AIC+, refer to the Advanced
Interface Converter (AIC+) User Manual, publication 1761-UM004.

Cable Selection Guide
1761-CBL-PM02 (2)

1761-CBL-AP00(2)

1761-CBL-PH02

Cable

Length

Connections from

to AIC+

External
Power Supply
Required(1)

Power
Selection
Switch
Setting(1)

1761-CBL-AP00(2)
1761-CBL-PM02(2)
1761-CBL-PH02

45 cm (17.7 in)
2m (6.5 ft)
2m (6.5 ft)

SLC 5/03 or SLC 5/04 processors, ch 0

port 2

yes

external

MicroLogix 1000, 1200, or 1500

port 1

yes

external

PanelView 550 through NULL modem
adapter

port 2

yes

external

DTAM Plus / DTAM Micro

port 2

yes

external

PC COM port

port 2

yes

external

(1) External power supply required unless the AIC+ is powered by the device connected to port 2, then the selection switch should be set to cable.
(2) Series C or higher cables are required.

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Communication Connections

1761-CBL-HM02(1)
1761-CBL-AM00(1)

1761-CBL-AH02

Table 4.6
Cable

Length

Connections from

to AIC+ External
Power Supply
Required(2)

Power
Selection
Switch
Settings

1761-CBL-AM00(1)
1761-CBL-HM02(1)
1761-CBL-AH02

45 cm (17.7 in)
2m (6.5 ft)
2m (6.5 ft)

MicroLogix 1000, 1200, or 1500

port 2

no

cable

to port 2 on another AIC+

port 2

yes

external

(1) Series C or higher cables are required.
(2) External power supply required unless the AIC+ is powered by the device connected to port 2, then the selection switch should be set to cable.

1747-CP3
1761-CBL-AC00

Cable

Length

Connections from

to AIC+ External
Power Supply
Required(1)

Power
Selection
Switch
Setting(1)

1747-CP3
1761-CBL-AC00(1)

3m (9.8 ft)
45 cm (17.7 in)

SLC 5/03 or SLC 5/04 processor, channel
0

port 1

yes

external

PC COM port

port 1

yes

external

PanelView 550 through NULL modem
adapter

port 1

yes

external

DTAM Plus / DTAM Micro

port 1

yes

external

Port 1 on another AIC+

port 1

yes

external

(1) External power supply required unless the AIC+ is powered by the device connected to port 2, then the selection switch should be set to cable.

user-supplied cable

Cable

Length

Connections from

to AIC+ External
Power Supply
Required(1)

Power
Selection
Switch
Setting(1)

straight 9-25 pin

—

modem or other communication device

port 1

external

yes

(1) External power supply required unless the AIC+ is powered by the device connected to port 2, then the selection switch should be set to cable.

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Communication Connections

4-15

1761-CBL-AS09
1761-CBL-AS03

Cable

Length

Connections from

to AIC+ External
Power Supply
Required(1)

Power
Selection
Switch
Setting(1)

1761-CBL-AS03
1761-CBL-AS09

3m (9.8 ft)
9.5m (31.17 ft)

SLC 500 Fixed,
SLC 5/01, SLC 5/02, and SLC 5/03
processors

port 3

yes

external

PanelView 550 RJ45 port

port 3

yes

external

(1) External power supply required unless the AIC+ is powered by the device connected to port 2, then the selection switch should be set to cable.

1761-CBL-PM02 Series C (or equivalent) Cable Wiring Diagram

Programming
Device

Controller

9-Pin D-Shell

8-Pin Mini Din

9

RI

24V

1

8

CTS

GND

2

7

RTS

RTS

3

6

DSR

RXD

4

5

GND

DCD

5

4

DTR

CTS

6

3

TXD

TXD

7

2

RXD

GND

8

1

DCD

Recommended User-supplied Components
These components can be purchased from your local electronics supplier.

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Communication Connections

Table 4.7 User Supplied Components
Component

Recommended Model

external power supply and chassis ground

power supply rated for 20.4 to 28.8V dc

NULL modem adapter

standard AT

straight 9-25 pin RS-232 cable

see table below for port information if
making own cables

1761-CBL-AP00 or 1761-CBL-PM02
Port 1
DB-9 RS-232
7

1
2

8

3
4

9

5

6

Port 2
cable straight D connector
6 7 8

6

Port 3
RS-485 connector

5
4

3

5
3

4
1 2

2
1

Table 4.8 AIC+ Terminals
Pin Port 1: DB-9 RS-232

Port 3: RS-485
Connector

1

chassis ground

2
3
4
5
6
7
8
9

Port 2(2): (1761-CBL-PM02
cable)
received line signal detector 24V dc
(DCD)
received data (RxD)
ground (GND)
transmitted data (TxD)
request to send (RTS)

DTE ready (DTR)(1)
signal common (GND)

received data (RxD)(3)
received line signal detector
(DCD)

DCE ready (DSR)(1)
request to send (RTS)
clear to send (CTS)
not applicable

clear to send (CTS)(3)
transmitted data (TxD)
ground (GND)
not applicable

cable shield
signal ground
DH-485 data B
DH-485 data A
termination
not applicable
not applicable
not applicable

(1) On port 1, pin 4 is electronically jumpered to pin 6. Whenever the AIC+ is powered on, pin 4 will match the
state of pin 6.
(2) An 8-pin mini DIN connector is used for making connections to port 2. This connector is not commercially
available. If you are making a cable to connect to port 2, you must configure your cable to connect to the
Allen-Bradley cable shown above.
(3) In the 1761-CBL-PM02 cable, pins 4 and 6 are jumpered together within the DB-9 connector.

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Communication Connections

4-17

Safety Considerations
This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or
non-hazardous locations only.
WARNING

EXPLOSION HAZARD
AIC+ must be operated from an external power
source.
This product must be installed in an enclosure. All
cables connected to the product must remain in the
enclosure or be protected by conduit or other
means.

See Safety Considerations on page 2-3 for additional information.

Install and Attach the AIC+
1. Take care when installing the AIC+ in an enclosure so that the cable
connecting the MicroLogix 1200 controller to the AIC+ does not
interfere with the enclosure door.
2. Carefully plug the terminal block into the RS-485 port on the AIC+ you
are putting on the network. Allow enough cable slack to prevent stress
on the plug.
3. Provide strain relief for the Belden cable after it is wired to the terminal
block. This guards against breakage of the Belden cable wires.

Apply Power to the AIC+
In normal operation with the MicroLogix 1200 programmable controller
connected to port 2 of the AIC+, the controller powers the AIC+. Any AIC+
not connected to a controller requires a 24V dc power supply. The AIC+
requires 120 mA at 24V dc.
If both the controller and external power are connected to the AIC+, the
power selection switch determines what device powers the AIC+.
ATTENTION

If you use an external power supply, it must be
24V dc (-15%/+20%). Permanent damage results if a
higher voltage supply is used.

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Communication Connections

Set the DC Power Source selector switch to EXTERNAL before connecting
the power supply to the AIC+. The following illustration shows where to
connect external power for the AIC+.

Bottom View

24VDC
DC
NEUT
CHS
GND

ATTENTION

Always connect the CHS GND (chassis ground)
terminal to the nearest earth ground. This connection
must be made whether or not an external 24V dc
supply is used.

Power Options
Below are two options for powering the AIC+:
• Use the 24V dc user power supply built into the MicroLogix 1200
controller. The AIC+ is powered through a hard-wired connection
using a communication cable (1761-CBL-HM02, or equivalent)
connected to port 2.
• Use an external DC power supply with the following specifications:
– operating voltage: 24V dc (-15%/+20%)
– output current: 150 mA minimum
– rated NEC Class 2
Make a hard-wired connection from the external supply to the screw
terminals on the bottom of the AIC+.

ATTENTION

Publication 1762-UM001H-EN-P - June 2015

If you use an external power supply, it must be 24V
dc (-15%/+20%). Permanent damage results if
miswired with the wrong power source.

Chapter

5

Use Trim Pots

Trim Pot Operation

The processor has two trimming potentiometers (trim pots) which allow
modification of data within the controller. Adjustments to the trim pots
change the value in the corresponding Trim Pot Information (TPI) register.
The data value of each trim pot can be used throughout the control program
as timer, counter, or analog presets depending upon the requirements of the
application.
The trim pots are located below the memory module port cover and to the
right of the communications port, as shown below.

Trim Pot 0
Trim Pot 1
0
1
COM

Use a small flathead screwdriver to turn the trim pots. Adjusting their value
causes data to change within a range of 0 to 250 (fully clockwise). The
maximum rotation of each trim pot is three-quarters, as shown below. Trim
pot stability over time and temperature is typically ±2 counts.

Maximum
(fully clockwise)

Minimum
(fully counterclockwise)

Trim pot file data is updated continuously whenever the controller is powered
up.

1

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Use Trim Pots

Trim Pot Information Function File
The composition of the Trim Pot Information (TPI) Function File is described
in the MicroLogix 1200 and 1500 Programmable Controllers Instruction Set
Reference Manual, publication 1762-RM001.

Error Conditions
Error conditions of the TPI Function File are described in the MicroLogix
1200 and 1500 Programmable Controllers Instruction Set Reference Manual,
publication 1762-RM001.

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Chapter

6

Use Real-time Clock and Memory Modules

TIP

For more information on ‘Real-time Clock Function
File’ and ‘Memory Module Information File’ refer to
the MicroLogix 1200 and 1500 Programmable
Controllers Instruction Set Reference Manual,
publication 1762-RM001.

Three modules with different levels of functionality are available for use with
the MicroLogix 1200 controller.

Real-time Clock Operation

Catalog Number

Function

1762-RTC

Real-time Clock

1762-MM1

Memory Module

1762-MM1RTC

Memory Module and Real-time Clock

The following sections cover:
• Removal/Insertion Under Power
• Write Data to the Real-time Clock
• RTC Battery Operation

Removal/Insertion Under Power
At power-up and when the controller enters a run or test mode, the controller
determines if a real-time clock module (RTC) is present. If an RTC is present,
its values (date, time and status) are written to the RTC Function File in the
controller.
The RTC module can be installed or removed at any time without risk of
damage to either the module or the controller. If an RTC is installed while the
MicroLogix 1200 is in a run or test mode, the module is not recognized until
either a power cycle occurs or until the controller is placed in a non-executing
mode (program mode, suspend mode or fault condition).
Removal of the RTC during run mode is detected within one program scan.
Removal of the RTC while in run mode causes the controller to write zeros to
the RTC Function File.
1

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Use Real-time Clock and Memory Modules

The following table indicates the accuracy of the RTC for various
temperatures.
Table 6.1 RTC Accuracy
Ambient Temperature

Accuracy(1)

0 °C (+32 °F)

+34 … -70 seconds/month

+25 °C (+77 °F)

+36 … -68 seconds/month

+40 °C (+104 °F)

+29 … -75 seconds/month

+55 °C (+131 °F)

-133 … -237 seconds/month

(1) These numbers are maximum worst case values over a 31-day month.

Write Data to the Real-time Clock
When valid data is sent to the real-time clock from the programming device or
another controller, the new values take effect immediately.
The real-time clock does not recognize or accept invalid date or time data.
Use the Disable Clock button in your RSLogix programming software to
disable the real-time clock before storing a module. This decreases the drain
on the RTC battery during storage.

RTC Battery Operation
The real-time clock has an internal battery that is not replaceable. The RTC
Function File features a battery low indicator bit (RTC:0/BL), which shows
the status of the RTC battery. When the battery is low, the indicator bit is set
(1). This means that the battery may fail within 14 days and the real-time clock
module needs to be replaced. When the battery low indicator bit is clear (0),
the battery level is acceptable or a real-time clock is not attached.
If the RTC battery is low and the controller is powered, the RTC operates
normally. If the controller power is removed and the RTC battery is low, RTC
data is lost.

Life Span

Operating Temperature

Storage Temperature(1)

5 years

0…40 °C (32 … 104 °F)

-40 … 60 °C (-40 … 140 °F)

(1) Stored for six months.

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Use Real-time Clock and Memory Modules

ATTENTION

Memory Module Operation

6-3

Operating with a low battery indication for more
than 14 days may result in invalid RTC data unless
power is on continuously.

The memory module supports the following features:
•
•
•
•
•

User Program and Data Back-up
User Program Compare
Data File Download Protection
Memory Module Write Protection
Removal/Insertion Under Power

ATTENTION

Electrostatic discharge can damage the Memory
Module. Do not touch the connector pins or other
sensitive areas.

User Program and Data Back-up
The memory module provides a simple and flexible program/data transport
mechanism, allowing the user to transfer the program and data to the
controller without the use of a personal computer and programming software.
The memory module can store one user program at a time.
During program transfers to or from the memory module, the controller’s
RUN LED flashes.

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Use Real-time Clock and Memory Modules

Program Compare
The memory module can also provide application security, allowing you to
specify that if the program stored in the memory module does not match the
program in the controller, the controller will not enter an executing (run or
test) mode. To enable this feature, set the S:2/9 bit in the system status file. See
‘Status System File’ in the MicroLogix 1200 and 1500 Programmable
Controllers Instruction Set Reference Manual, Publication 1762-RM001 for
more information.

Data File Download Protection
The memory module supports data file download protection. This allows user
data to be saved (not overwritten) during a download.
TIP

Data file download protection is only functional if the
processor does not have a fault, size of all protected
data files in the memory module exactly match the
size of protected data files within the controller, and
all protected data files are of the same type. See
‘Protecting Data Files During Download’ in the
MicroLogix 1200 and 1500 Programmable Controllers
Instruction Set Reference Manual, publication
1762-RM001.

Memory Module Write Protection
The memory module supports write-once, read-many behavior. Write
protection is enabled using your programming software.
IMPORTANT

Once set, write protection cannot be removed. A
change cannot be made to the control program
stored in a write protected memory module. If a
change is required, use a different memory module.

Removal/Insertion Under Power
The memory module can be installed or removed at any time without risk of
damage to either the memory module or the controller. If a memory module is
installed while the MicroLogix 1200 is executing, the memory module is not
recognized until either a power cycle occurs, or until the controller is placed in
a non-executing mode (program mode, suspend mode or fault condition).

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Appendix

A

Specifications

The 1762 specifications include:
• Controller Specifications
• Expansion I/O Specifications

Controller Specifications
Table A.1 General
Attribute

1762L24AWA
L24AWAR

L24BWA
L24BWAR

L24BXB
L24BXBR

L40AWA
L40AWAR

L40BWA
L40BWAR

L40BXB
L40BXBR

Dimensions

Height: 90 mm, 104 mm (with DIN latch open)
Width: 110 mm
Depth: 87 mm

Height: 90 mm, 104 mm (with DIN latch open)
Width: 160 mm
Depth: 87 mm

Shipping weight

0.9 kg (2.0 lbs)

1.1 kg (2.4 lbs)

Number of I/O

14 inputs and 10 outputs

24 inputs, 16 outputs

Power supply voltage

100 … 240V ac
(-15%, +10%)
at 47…63 Hz

Heat dissipation

15.2 W

Power supply inrush
current

24V dc
(-15%, +10%)
Class 2
SELV

100 … 240V ac
(-15%, +10%)
at 47…63 Hz

17.0 W

21.0 W

120V ac: 25A for 8 ms
240V ac: 40A for 4 ms

24V dc:
15A for 20 ms

120V ac: 25A for 8 ms
240V ac: 40A for 4 ms

24V dc:
15A for 30 ms

Power supply usage

68VA

70VA

27 W

80VA

82VA

40 W

Power
supply
output

5V dc

400 mA

400 mA(1)

400 mA

600 mA

600 mA(2)

600 mA

24V dc

350 mA

350 mA(1)

350 mA

500 mA

500 mA(2)

500 mA

Sensor power output

none

250 mA at 24V dc none
AC Ripple < 500 mV
peak-to-peak
400 µF max.(1)

none

400 mA at 24V dc none
AC Ripple < 500 mV
peak-to-peak
400 µF max.(2)

Input circuit type

120V ac

24V dc
sink/source

24V dc
sink/source

120V ac

24V dc
sink/source

24V dc
sink/source

Output circuit type

Relay

Relay

Relay/FET

Relay

Relay

Relay/FET

15.7 W

24V dc
(-15%, +10%)
Class 2
SELV
22.0 W

27.9 W

Temperature, operating 0…55 °C (32…131 °F) ambient
Temperature, storage

-40…+85 °C (-40…185 °F) ambient

Operating humidity

5…95% relative humidity (non-condensing)

Vibration

Operating: 10…500 Hz, 5G, 0.030 in. max. peak-to-peak, 2 hours each axis
Relay Operation: 1.5G

1

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Specifications

Table A.1 General
Attribute

1762L24AWA
L24AWAR

Shock

Agency certification

L24BWA
L24BWAR

L24BXB
L24BXBR

L40AWA
L40AWAR

L40BWA
L40BWAR

L40BXB
L40BXBR

Operating: 30G; 3 pulses each direction, each axis
Relay Operation: 7G
Non-Operating: 50G panel mounted (40G DIN Rail mounted); 3 pulses each direction, each axis
• UL 508
• C-UL under CSA C22.2 no. 142
• Class I, Div. 2, Groups A, B, C, D
(UL 1604, C-UL under CSA C22.2 no. 213)
• CE/RCM/EAC compliant for all applicable directives

Electrical/EMC

The controller has passed testing at the following levels:
• EN 61000-4-2: 4 kV contact, 8 kV air, 4 kV indirect
• EN 61000-4-3: 10V/m, 80 to 1000 MHz, 80% amplitude modulation, +900 MHz keyed carrier
• EN 61000-4-4: 2 kV, 5 kHz; communications cable: 1 kV, 5 kHz
• EN 61000-4-5: communications cable 1 kV galvanic gun
I/O: 2 kV CM (common mode), 1 kV DM (differential mode)
AC Power Supply: 4 kV CM (common mode), 2 kV DM (differential mode)
DC Power Supply: 500V CM (common mode), 500V DM (differential mode)
• EN 61000-4-6: 10V, communications cable 3V

Terminal screw torque

0.791 Nm (7 in-lb) rated

(1) Do not allow the total load power consumed by the 5V dc, 24V dc, and sensor power outputs to exceed 12W.
(2) Do not allow the total load power consumed by the 5V dc, 24V dc, and sensor power outputs to exceed 16W.
See Appendix F for system validation worksheets.

Table A.2 Input Specifications
1762-L24AWA
1762-L40AWA
1762-L24AWAR
1762-L40AWAR

1762-L24BWA, -L24BXB, -L40BWA, -L40BXB
1762-L24BWAR, -L24BXBR, -L40BWAR, -L40BXBR
Inputs 0 through 3

Inputs 4 and higher

On-state voltage range

79…132V ac

14…24V dc
(+10% at 55 °C/131 °F)
(+25% at 30 °C/86 °F)

10…24V dc
(+10% at 55 °C/131 °F)
(+25% at 30 °C/86 °F)

Off-state voltage range

0…20V ac

0…5V dc

Operating frequency

47…63 Hz

0 Hz…20 kHz

Attribute

0 Hz…1 kHz
(scan time dependent)

On-state current:
• minimum

• 5.0 mA at 79V ac

• 2.5 mA at 14V dc

• 2.0 mA at 10V dc

• nominal

• 12 mA at 120V ac

• 7.3 mA at 24V dc

• 8.9 mA at 24V dc

• maximum

• 16.0 mA at 132V ac

• 12.0 mA at 30V dc

• 12.0 mA at 30V dc

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Table A.2 Input Specifications
Attribute

1762-L24AWA
1762-L40AWA
1762-L24AWAR
1762-L40AWAR

1762-L24BWA, -L24BXB, -L40BWA, -L40BXB
1762-L24BWAR, -L24BXBR, -L40BWAR, -L40BXBR

Off-state leakage current

2.5 mA max.

1.5 mA min.

Nominal impedance

12 kΩ at 50 Hz
10 kΩ at 60 Hz

3.3 kΩ

Inrush current (max.) at 120V ac

250 mA

Not Applicable

Inputs 0 through 3

Inputs 4 and higher

2.7 kΩ

Table A.3 Output Specifications - General
Attribute

1762L24AWA
L24BWA
L24AWAR
L24BWAR

L24BXB
L24BXBR

L40AWA
L40BWA
L40AWAR
L40BWAR

L40BXB
L40BXBR

1440VA

–

1440VA

1440VA

8A

7.5 A

8A

8A

Relay and FET Outputs
Controlled load, max.
Continuous current, max.
Current per group common
Current per controller

at 150V max

30 A or total of per-point loads, whichever is less

at 240V max

20 A or total of per-point loads, whichever is less

Relay Outputs
Turn on time/Turn off time

10 msec (minimum)(1)

Relay life - Electrical

Refer to Relay Life Chart

Relay life - Mechanical

20,000,000 cycles

Load current

10 mA (minimum)

(1) scan time dependent
Table A.4 Relay Contact Ratings
Maximum Volts

Make

Amperes
Break

Amperes
Continuous

Make

Volt-Amperes
Break

240V ac

7.5A

0.75A

2.5A(1)

1800 VA

180 VA

120V ac

15A

1.5A

2.5A(1)

1800 VA

180 VA

125V dc

0.22A(2)

1.0A

28 VA

24V dc

1.2A(2)

2.0A

(1) 1.5A above 40°C.
(2) For dc voltage applications, the make/break ampere rating for relay contacts can be determined by dividing 28 VA by
the applied dc voltage. For example, 28 VA/48V dc = 0.58A. For dc voltage applications less than 14V, the make/break
ratings for relay contacts cannot exceed 2A.

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Specifications

ATTENTION

Do not exceed the "Current per group common" specification.

Number of operations (x 104)

Relay Life Chart

300
200
100

240VAC COSφ 0.4
30VDC/240VAC
resistive

50
30
20
10
5
3
2
0.1 0.2 0.3 0.5

1

2 3

Switching capacity(A)

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Specifications

A-5

Table A.5 BXB FET Output Specifications
Attribute

General Operation

Power supply voltage

24V dc (-15%, +10%)

High Speed Operation(1)
(Output 2 Only)

On-state voltage drop:
• at maximum load current

• 1V dc

• Not Applicable

• at maximum surge current

• 2.5V dc

• Not Applicable

• maximum load

• See graphs below.

• 100 mA

• minimum load

• 1.0 mA

• 10 mA

• maximum leakage

• 1.0 mA

• 1.0 mA

Current rating per point

Maximum output current (temperature dependent):

2.0

FET Current per Point
(1762-L24BXB, L40BXB
1762-L24BXBR, L40BXBR)

9.0

8A, 30˚C (86˚F)

8.0

1.75

7.0

1.5A, 30˚C (86˚F)

1.5

6.0

1.25
1.0

1.0A, 55˚C (131˚F)

Valid
Range

0.75
0.5

Current (Amps)

Current (Amps)

FET Total Current
(1762-L40BXB and L40BXBR)

0.25

5.5A, 55˚C (131˚F)
5.0

Valid
Range

4.0
3.0
2.0
1.0

10˚C
(50˚F)

30˚C
(86˚F)

50˚C
(122˚F)

70˚C
(158˚F)

Temperature

10˚C
(50˚F)

30˚C
(86˚F)

50˚C
(122˚F)

70˚C
(158˚F)

Temperature

Surge current per point:
• peak current

• 4.0A

• Not applicable

• maximum surge duration

• 10 ms

• Not applicable

• maximum rate of repetition at 30 °C (86 °F)

• once every second

• Not applicable
• Not applicable

• once every 2 seconds

• maximum rate of repetition at 55 °C (131 °F)
Turn-on time, max.

0.1 ms

6 µs

Turn-off time, max.

1.0 ms

18 µs

Repeatability, max.

n/a

2 µs

Drift, max.

n/a

1 µs per 5 °C (41 °F)

(1) Output 2 is designed to provide increased functionality over the other FET outputs. Output 2 may be used like the other FET transistor outputs, but in addition, within a
limited current range, it may be operated at a higher speed. Output 2 also provides a pulse train output (PTO) or pulse width modulation output (PWM) function.

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Specifications

Table A.6 AC Input Filter Settings
Nominal Filter Setting (ms)

ON Delay (ms)

8

OFF Delay (ms)

Minimum

Maximum

Minimum

Maximum

2

20

10

20

Table A.7 Fast DC Input Filter Settings (Inputs 0 to 3)
Nominal Filter Setting (ms) ON Delay (ms)

OFF Delay (ms)

Maximum Counter Frequency (Hz)
50% Duty Cycle

Minimum

Maximum

Minimum

Maximum

0.025

0.005

0.025

0.005

0.025

20.0 kHz

0.075

0.040

0.075

0.045

0.075

6.7 kHz

0.100

0.050

0.100

0.060

0.100

5.0 kHz

0.250

0.170

0.250

0.210

0.250

2.0 kHz

0.500

0.370

0.500

0.330

0.500

1.0 kHz

1.00

0.700

1.000

0.800

1.000

0.5 kHz

2.000

1.700

2.000

1.600

2.000

250 Hz

4.000

3.400

4.000

3.600

4.000

125 Hz

8.000(1)

6.700

8.000

7.300

8.000

63 Hz

16.000

14.000

16.000

14.000

16.000

31 Hz

(1) This is the default setting.

Table A.8 Normal DC Input Filter Settings (Inputs 4 and higher)
Nominal Filter Setting (ms) ON Delay (ms)

OFF Delay (ms)

Maximum Frequency (Hz)
50% Duty Cycle

Minimum

Maximum

Minimum

Maximum

0.500

0.090

0.500

0.020

0.500

1.0 kHz

1.000

0.500

1.000

0.400

1.000

0.5 kHz

2.000

1.100

2.000

1.300

2.000

250 Hz

4.000

2.800

4.000

2.700

4.000

125 Hz

8.000(1)

5.800

8.000

5.300

8.000

63 Hz

16.000

11.000

16.000

10.000

16.000

31 Hz

(1) This is the default setting.

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Table A.9 Working Voltage (1762-L24AWA, 1762-L40AWA)
Attribute

1762-L24AWA, 1762-L40AWA, 1762-L24AWAR, 1762-L40AWAR

Power supply input to backplane isolation Verified by one of the following dielectric tests: 1836V ac for 1 second or 2596V dc for 1 second
265V ac Working Voltage (IEC Class 2 reinforced insulation)
Input group to backplane isolation

Verified by one of the following dielectric tests:1517V ac for 1 second or 2145V dc for 1 second
132V ac Working Voltage (IEC Class 2 reinforced insulation)

Input group to input group isolation

Verified by one of the following dielectric tests:1517V ac for 1 second or 2145V dc for 1 second
132V ac Working Voltage (basic insulation)

Output group to backplane isolation

Verified by one of the following dielectric tests: 1836V ac for 1 second or 2596V dc for 1 second

Output group to output group isolation

Verified by one of the following dielectric tests: 1836V ac for 1 second or 2596V dc for 1second

265V ac Working Voltage (IEC Class 2 reinforced insulation)
265V ac Working Voltage (basic insulation) 150V ac Working Voltage (IEC Class 2 reinforced
insulation).
Table A.10 Working Voltage (1762-L24BWA, 1762-L40BWA, 1762-L24BWAR, 1762-L40BWAR)
Attribute

1762-L24BWA, 1762-L40BWA, 1762-L24BWAR, 1762-L40BWAR

Power supply input to backplane isolation Verified by one of the following dielectric tests:1836V ac for 1 second or 2596V dc for 1 second
265V ac Working Voltage (IEC Class 2 reinforced insulation)
Input group to backplane isolation and
input group to input group isolation

Verified by one of the following dielectric tests: 1200V ac for 1 second or 1697V dc for 1 second

Output group to backplane isolation

Verified by one of the following dielectric tests: 1836V ac for 1 second or 2596V dc for 1 second

75V dc Working Voltage (IEC Class 2 reinforced insulation)
265V ac Working Voltage (IEC Class 2 reinforced insulation).

Output group to output group isolation

Verified by one of the following dielectric tests: 1836V ac for 1 second or 2596V dc for 1 second
265V ac Working Voltage (basic insulation) 150V Working Voltage (IEC Class 2 reinforced
insulation)

Table A.11 Working Voltage (1762-L24BXB, 1762-L40BXB, 1762-L24BXBR, 1762-L40BXBR)
Attribute

1762-L24BXB, 1762-L40BXB, 1762-L24BXBR, 1762-L40BXBR

Input group to backplane isolation and Verified by one of the following dielectric tests: 1200V ac for 1 second or 1697V dc for 1 second
input group to input group isolation
75V dc Working Voltage (IEC Class 2 reinforced insulation)
FET output group to backplane isolation Verified by one of the following dielectric tests: 1200V ac for 1 second or 1697V dc for 1 second
75V dc Working Voltage (IEC Class 2 reinforced insulation)
Relay output group to backplane
isolation

Verified by one of the following dielectric tests: 1836V ac for 1 second or 2596V dc for 1 second

Relay output group to relay output
group and FET output group isolation

Verified by one of the following dielectric tests: 1836V ac for 1 second or 2596V dc for 1 second

265V ac Working Voltage (IEC Class 2 reinforced insulation).
265V ac Working Voltage (basic insulation) 150V Working Voltage (IEC Class 2 reinforced
insulation)

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Specifications

Expansion I/O
Specifications

Discrete I/O Modules

Table A.12 General Specifications
Attribute

Value

Dimensions

90 mm (height) x 87 mm (depth) x 40.4 mm (width)
height including mounting tabs is 110 mm
3.54 in. (height) x 3.43 in. (depth) x 1.59 in. (width)
height including mounting tabs is 4.33 in.

Temperature, storage

-40…85 °C (-40…185 °F)

Temperature, operating

-20…65 °C (-4…149 °F)(1)

Operating humidity

5…95% non-condensing

Operating altitude

2000 m (6561 ft)

Vibration

Operating: 10…500 Hz, 5G, 0.030 in. max. peak-to-peak,
2 hours per axis
Relay Operation: 1.5G

Shock

Operating: 30G panel mounted, 3 pulses per axis
Relay Operation: 7G
Non-Operating: 50G panel mounted, 3 pulses per axis
(40G DIN Rail mounted)

Agency certification

C-UL certified (under CSA C22.2 No. 142)
UL 508 listed
CE compliant for all applicable directives
C-Tick marked for all applicable acts

Hazardous environment class

For 1762-IQ32T, 1762-OB32T, and 1762-OV32T modules
Hazardous Location, Class I, Division 2 Groups A, B, C, D (UL 1604, C-UL under CSA C22.2 No. 213,
ANSI/ISA-12.12.01)
For all other modules:
Hazardous Location, Class I, Division 2 Groups A, B, C, D (UL 1604, C-UL under CSA C22.2 No. 213)
for all modules

Radiated and conducted emissions

EN50081-2 Class A

Electrical /EMC:

The module has passed testing at the following levels:

ESD immunity

For 1762-IQ32T, 1762-OB32T, and 1762-OV32T modules
IEC61000-4-2: 4 kV contact, 8 kV air, 4 kV indirect
For all other modules:
IEC1000-4-2: 4 kV contact, 8 kV air, 4 kV indirect

Radiated RF immunity
(IEC1000-4-3)

For 1762-IQ32T, 1762-OB32T, and 1762-OV32T modules
IEC61000-4-3: 10V/m, 80…2700 MHz, 80% amplitude modulation
For all other modules:
IEC1000-4-3: 10 V/m, 80…1000 MHz, 80% amplitude modulation, +900 MHz keyed carrier
for all modules

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Table A.12 General Specifications
Attribute

Value

EFT/B immunity

For 1762-IQ32T, 1762-OB32T, and 1762-OV32T modules
IEC61000-4-4: 2 kV, 5 kHz on signal ports
For all other modules
IEC1000-4-4: 2 kV, 5 kHz

Surge transient immunity

For 1762-IQ32T, 1762-OB32T, and 1762-OV32T modules
IEC61000-4-5: 2 kV common mode, 1 kV differential mode
For all other modules
IEC1000-4-5: 2 kV common mode, 1 kV differential mode

Conducted RF immunity

For 1762-IQ32T, 1762-OB32T, and 1762-OV32T modules
IEC61000-4-6: 10V, 0.15…80 MHz(2)
For all other modules:
IEC1000-4-6: 10V, 0.15…80 MHz(2)

(1) For the exact operating temperature range, refer to the Installation Instructions publication for the specific module.
(2) Conducted Immunity frequency range may be 150 kHz to 30 MHz if the Radiated Immunity frequency range is 30…1000 MHz.

Table A.13 Input Specifications
Attribute

Value
1762-IA8

1762-IQ8

1762-IQ16

1762-IQ32T

Shipping weight, approx.
(with carton)

209 g (0.46 lbs.)

200 g (0.44 lbs.)

230 g (0.51 lbs.)

200g (0.44 lbs.)

Voltage category

100/120V ac

24V dc (sink/source)(1)

24V dc
(sink/source)(1)

24V dc
(sink/source)(1)

Operating voltage range

79…132V ac at
47…63 Hz

10…30V dc at 30 °C
(86 °F)
10…26.4V dc at 55 °C
(131 °F)

10…30V dc
10…26.4V dc ) (3)(2)

10…30V dc (24 points) at
30 °C (86 °F)
10…26.4V dc
(23 points)at 60 °C
(140 °F)

Number of inputs

8

8

16

32

Bus current draw, max.

50 mA at 5V dc (0.25 W)

50 mA at 5V dc (0.25 W)

70 mA at 5V dc
(0.35 W)(3)

170 mA at 5V dc
0 mA at 24V dc

Heat dissipation, max.

2.0 W

3.7 W

4.3 W at 26.4V
5.4 W at 30V(3)

5.4 W at 26.4V dc
6.8 W at 30V dc

Signal delay, max.

On delay: 20.0 ms
Off delay: 20.0 ms

On delay: 8.0 ms
Off delay: 8.0 ms

On delay: 8.0 ms
Off delay: 8.0 ms

On delay: 8.0 ms
Off delay: 8.0 ms

Off-state voltage, max.

20V ac

5V dc

5V dc

5V dc

Off-state current, max.

2.5 mA

1.5 mA

1.5 mA

1.0 mA

On-state voltage, min.

79V ac (min.)
132V ac (max.)

10V dc

10V dc

10V dc

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Specifications

Table A.13 Input Specifications
Attribute

Value
1762-IA8

1762-IQ8

1762-IQ16

1762-IQ32T

On-state current, min.

5.0 mA at 79V ac 47 Hz

2.0 mA at 10V dc

2.0 mA at 10V dc

1.6 mA at 10V dc
2.0 mA at 15V dc

On-state current, nom.

12.0 mA at 120V ac 60 Hz 8.0 mA at 24V dc

8.0 mA at 24V dc

-

On-state current, max.

16.0 mA at 132V ac 63 Hz 12.0 mA at 30V dc

12.0 mA at 30V dc

5.7 mA at 26.4V dc
6.5 mA at 30.0V dc

Inrush current, max.

250 mA

Not applicable

Not applicable

Not applicable

Nominal impedance

12K Ω at 50 Hz
10K Ω at 60 Hz

3K Ω

3K Ω

4.7K Ω

Power supply distance
rating

6 (The module may not be located more than 6 modules away from the power supply.)

IEC input compatibility

Type 1+

Type 1+

Type 1+

Type 1

Isolated groups

Group 1: inputs 0 to 7
(internally connected
commons)

Group 1: inputs 0 to 7
(internally connected
commons)

Group 1: inputs 0 to 7;
Group 2: inputs 8 to 15

Group 1: Inputs 0…7;
Group 2: Inputs 8…15;
Group 3: Inputs 16…23;
Group 4: Inputs 24…31

Input group to backplane
isolation

Verified by one of the
following dielectric tests:
1517V ac for 1 s or
2145V dc for 1 s.
132V ac working voltage
(IEC Class 2 reinforced
insulation)

Verified by one of the following dielectric tests:
1200V ac for 1 s or 1697V dc for 1 s.
75V dc working voltage (IEC Class 2 reinforced
insulation)

Vendor I.D. code

1

Product type code

7

Product code

114

Verified by one of the
following dielectric tests:
1200V ac for 2 s or
1697V dc for 2 s
75V dc working voltage
(IEC Class 2 reinforced
insulation)

96

97

99

(1) Sinking/Sourcing Inputs - Sourcing/sinking describes the current flow between the I/O module and the field device. Sourcing I/O circuits supply (source) current to sinking
field devices. Sinking I/O circuits are driven by a current sourcing field device. Field devices connected to the negative side (DC Common) of the field power supply are
sinking field devices. Field devices connected to the positive side (+V) of the field supply are sourcing field devices.
(2) Refer to Publication 1762-IN10, MicroLogix 1762-IQ16 DC Input Module Installation Instructions, for the derating chart.
(3) Only applicable to Series B I/O modules.

Table A.14 Output Specifications
Specification

1762-OA8

1762-OB8

1762-OB16

1762-OB32T

Shipping weight, approx.
(with carton)

215 g (0.48 lbs.)

210 g (0.46 lbs.)

235 g (0.52 lbs.)

200 g (0.44 lbs.)

Voltage category

100…240V ac

24V dc

24V dc

24V dc source

Operating voltage range

85…265V ac at 47 to 63
Hz

20.4…26.4V dc

20.4…26.4V dc

10.2…26.4V dc

Number of outputs

8

8

16

32

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Table A.14 Output Specifications
Specification

1762-OA8

1762-OB8

1762-OB16

Bus current draw, max.

115 mA at 5V dc
(0.575 W)

115 mA at 5V dc (0.575
W)

175 mA at 5V dc (0.88 W) 175 mA at 5V dc
0 mA at 24V dc

Heat dissipation, max.

2.9 W

1.61 W

2.9 W at 30 °C (86 °F)
2.1 W at 55 °C (131 °F)

3.4 W at 26.4 dc

Signal delay, max. –
resistive load

On delay: 1/2 cycle
Off delay: 1/2 cycle

On delay: 0.1 ms
Off delay: 1.0 ms

On delay: 0.1 ms
Off delay: 1.0 ms

On delay: 0.5 ms
Off delay: 4.0 ms

Off-state leakage, max.

2 mA at 132V,
2.5 mA at 265V

1.0 mA

1.0 mA

0.1 mA at 26.4V dc

On-state current, min.

10 mA

1.0 mA

1.0 mA

1.0 mA

On-state voltage drop,
max.

1.5V at 0.5 A

1.0V dc

1.0V dc

0.3V dc at 0.5 A

Continuous current per
point, max.

0.25 A at 55 °C (131 °F)
0.5 A at 30 °C (86 °F)

0.5 A at 55 °C (131 °F)
1.0 A at 30°C (86 °F)

0.5 A at 55°C (131 °F)
1.0 A at 30°C (86 °F)

0.5 A at 60 °C (140 °F)

Continuous current per
common, max.

1.0 A at 55 °C (131 °F)
2.0 A at 30 °C (86 °F)

4.0A at 55°C (131 °F)
8.0A at 30°C (86°F)

4.0 A at 55°C (131 °F)
8.0 A at 30°C (86 °F)

2.0 A at 60 °C (140 °F)

Continuous current per
module, max.

2.0 A at 55°C (131°F)
4.0 A at 30°C (86°F)

4.0 A at 55°C;
8.0 A at 30°C

4.0 A at 55°C (131 °F)
8.0 A at 30°C (86 °F)

4.0 A at 60 °C (140 °F)

Surge current, max.

5.0 A (Repeatability is
once every 2 seconds for
a duration of 25 ms.)

2.0A (Repeatability is
once every 2 seconds at
55 °C (131 °F), once every
second at 30 °C (86 °F)
for a duration of 10 ms.)

2.0 A (Repeatability is
2.0A (Repeatability is
once every 2 seconds at once every 2 s at 60 °C
55 °C (131 °F), once every (140 °F) for 10 ms.)
second at 30 °C (86 °F)
for a duration of 10 ms.)

Power supply distance
rating

6 (The module may not be more than 6 modules away from the power supply.)

Isolated groups

Group 1:
Outputs 0 to 3
Group 2:
Outputs 4 to 7

Output group to
backplane isolation

Output group to output
group isolation

Group 1:
Outputs 0 to 7

1762-OB32T

Group 1:
Outputs 0 to 15

Group 1: Outputs 0…15
Group 2: Outputs 16…31
(internally connected to
common)

Verified by one of the following dielectric tests:
Verified by one of the
following dielectric tests: 1200V ac for 1 s or 1697V dc for 1 s.
1836V ac for 1 s or 2596V
75V dc working voltage (IEC Class 2 reinforced
dc for 1 s.
insulation)
265V ac working voltage
(IEC Class 2 reinforced
insulation)

Verified by one of the
following dielectric tests:
1200V ac for 2 s or 1697V
dc for 2 s.

Not applicable
Verified by one of the
following dielectric tests:
1836V ac for 1 s or 2596V
dc for 1 s.

Verified by one of the
following dielectric tests:
1200V ac for 2 s or 1697V
dc for 2 s.

265V ac working voltage
(IEC Class 2 reinforced
insulation)

75V dc working voltage
(IEC Class 2 reinforced
insulation)

75V dc working voltage
(IEC Class 2 reinforced
insulation)

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Specifications

Table A.14 Output Specifications
Specification

1762-OA8

Vendor I.D. code

1

Product type code

7

Product code

119

1762-OB8

1762-OB16

1762-OB32T

101

103

100

Table A.15 Output Specifications
Specification

1762-OV32T

1762-OW8

1762-OW16

1762-OX6I

Shipping weight, approx.
(with carton)

200 g (0.44 lbs.)

228 g (0.50 lbs.)

285 g (0.63 lbs.)

220 g (0.485 lbs)

Voltage category

24V dc sink

AC/DC normally open
relay

AC/DC normally open
relay

AC/DC Type C Relay

Operating voltage range

10.2…26.4V dc

5…265V ac
5…125V dc

5…265V ac
5…125V dc

5…265V ac
5…125V dc

Number of outputs

32

8

16

6

Bus current draw, max.

175 mA at 5V dc
0 mA at 24V dc

80 mA at 5V dc (0.40 W) 140 mA at 5V dc (0.70 W) 110 mA at 5V dc (0.55 W)
90 mA at 24V dc (2.16 W) 180 mA at 24V dc
110 mA at 24V dc
(2.64 W)
(4.32 W)(1)

Heat dissipation, max.

2.7 W at 26.4V dc

2.9 W

6.1 W(1)

2.8 W

Signal delay, max. –
resistive load

On delay: 0.5 ms
Off delay: 4.0 ms

On delay: 10 ms
Off delay: 10 ms

On delay: 10 ms
Off delay: 10 ms

On delay:
10 ms (max)
6 ms (typical)
Off Delay:
20 ms (max)
12 ms (typical)

Off-state leakage, max.

0.1 mA at 26.4V dc

0 mA

0 mA

0 mA

On-state current, min.

1.0 mA

10 mA

10 mA

100 mA

On-state voltage drop,
max.

0.3V dc at 0.5A

Not applicable

Not applicable

Not applicable

Continuous current per
point, max.

0.5A at 60 °C (140 °F)

2.5 A (Also see “Relay Contact Ratings” on page A-3.) 7A (Also see “Relay
Contact Ratings” on
page A-3.)

Continuous current per
common, max.

2.0 A at 60 °C (140 °F)

8A

8A

7A (Also see “Relay
Contact Ratings” on
page A-3.)

Continuous current per
module, max.

4.0 A at 60 °C (140 °F)

16 A

16A

30A (Also see Module
Load Ratings 1762-OX6I
on page A-14.

Surge current, max.

2.0 A (Repeatability is
once every 2 s at 60 °C
(140 °F) for 10 ms)

See “Relay Contact Ratings” on page A-3

Power supply distance
rating

6 (The module may not be more than 6 modules away from the power supply.)

Publication 1762-UM001H-EN-P - June 2015

See “Relay Contact
Ratings” on page A-3.

Specifications

A-13

Table A.15 Output Specifications
Specification

1762-OV32T

1762-OW8

1762-OW16

1762-OX6I

Isolated groups

Group 1: Outputs 0…15

Group 1: Outputs 0 to 3
Group 2: Outputs 4 to 7

Group 1: Outputs 0 to 7
Group 2: Outputs 8 to 15

All 6 Outputs Individually
Isolated.

Group 2: Outputs 16…31
(internally connected to
common)
Output group to
backplane isolation

Verified by one of the following dielectric tests: 1836V ac for 1 s or 2596V dc for
Verified by one of the
following dielectric tests: 1 s.
1200V ac for 2 s or 1697V
265V ac working voltage (IEC Class 2 reinforced insulation)
dc for 2 s.
75V dc working voltage
(IEC Class 2 reinforced
insulation)

Output group to output
group isolation

Verified by one of the following dielectric tests: 1836V ac for 1 s or 2596V dc for
Verified by one of the
following dielectric tests: 1 s.
1200V ac for 2 s or 1697V
265V ac working voltage (basic insulation)
dc for 2 s.
150V ac working voltage (IEC Class 2 reinforced insulation)
75V dc working voltage
(IEC Class 2 reinforced
insulation)

Vendor I.D. code

1

Product type code

7

Product code

102

120

121

124

(1) Only applicable to Series B I/O modules.

Table A.16 Relay Contact Ratings (1762-OW8 and 1762-OW16)
Maximum Volts Amperes

Amperes
Continuous

Make

Break

240V ac

7.5 A

0.75 A

120V ac

15 A

1.5 A

125V dc

0.22 A(1)

1.0 A

24V dc

1.2 A(2)

2.0 A

Volt-Amperes
Make

Break

2.5 A(2)

1800VA

180VA

2.5 A(1)

1800VA

180VA

28VA

(1) For dc voltage applications, the make/break ampere rating for relay contacts can be determined by dividing 28
VA by the applied dc voltage. For example, 28VA/48V dc = 0.58 A. For dc voltage applications less than 14 V, the
make/break ratings for relay contacts cannot exceed 2 A.
(2) 1.5 A above 40 °C (104 °F).

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Specifications

Table A.17 Relay Contact Ratings 1762-OX6I
Volts (max.)

Continuous
Amps per Point
(max.)(2)

Amperes(1)

Voltamperes

Make

Break

Make

Break

240V ac

15 A

1.5 A

5.0 A

3600VA

360VA

120V ac

30 A

3.0 A

7.0 A(3)

125V dc

0.4 A

2.5 A

50VA(4)

24V dc

7.0 A

7.0 A(3)

168VA(4)

(1) Surge Suppression – Connecting surge suppressors across your external inductive load will extend the life of
the relay contacts. For additional details, refer to Industrial Automation Wiring and Grounding Guidelines,
publication 1770-4.1.
(2) The continuous current per module must be limited so the module power does not exceed 1440VA.
(3) 6 A in ambient temperatures above 40 °C (104 °F)
(4) DC Make/Break Voltamperes must be limited to 50 VA for DC voltages between 28V dc and 125V dc.
DC Make/Break Voltamperes below 28V dc are limited by the 7 A Make/Break current limit.

Table A.18 Module Load Ratings 1762-OX6I
Volts (max.)

Controlled Load (Current) per Module (max.)

240V ac

6A

120V ac

12 A(1)

125V dc

11.5 A

24V dc

30 A(2)

(1) Current per relay limited to 6 A at ambient temperatures above 40 °C (104 °F).
(2) 24 A in ambient temperatures above 40 °C (104 °F). Limited by ambient temperature
and the number of relays controlling loads. See diagram below.

8
Ambient Temperature
below 40°C

7
6

Ambient Temperature
above 40°C

5
4
3
1

2

3

4

5

Number of Relays Controlling Loads

Publication 1762-UM001H-EN-P - June 2015

6

Maximum Current per Relay (Amps)

Relays Used vs. Maximum Current per Relay (24V dc) 1762-OX6I

Specifications

A-15

Analog Modules
Table A.19 Analog Modules Common Specifications
Specification

1762-IF2OF2, 1762-IF4, 1762-IR4, 1762-IT4 and 1762-OF4

Dimensions

90 mm (height) x 87 mm (depth) x 40 mm (width), height including mounting tabs is 110 mm
3.54 in. (height) x 3.43 in. (depth) x 1.58 in. (width), height including mounting tabs is 4.33 in.

Temperature, storage

-40…85 °C (-40…185 °F)

Temperature, operating

-20…65 °C (-4…149 °F)(1)

Operating humidity

5…95% non-condensing

Operating altitude

2000 m (6561 ft)

Vibration

Operating: 10…500 Hz, 5G, 0.030 in. max. peak-to-peak

Shock

Operating: 30G

Module power LED

On: indicates power is applied.

Recommended cable

Belden 8761 (shielded)
(For 1762-IT4, Shielded thermocouple extension wire for the specific type of thermocouple you are
using. Follow thermocouple manufacturer’s recommendations.)

Agency certification

C-UL certified (under CSA C22.2 No. 142)
UL 508 listed
CE compliant for all applicable directives
C-Tick marked for all applicable acts (1762-IR4 and 1762-IT4)

Hazardous environment class

Class I, Division 2, Hazardous Location, Groups A, B, C, D (UL 1604, C-UL under CSA C22.2 No. 213)

Noise immunity

NEMA standard ICS 2-230

Radiated and conducted emissions

EN50081-2 Class A

Electrical/EMC:

The module has passed testing at the following levels:

ESD immunity
(IEC1000-4-2)

4 kV contact, 8 kV air, 4 kV indirect

Radiated RF immunity
(IEC1000-4-3)

10 V/m, 80…1000 MHz, 80% amplitude modulation, +900 MHz keyed carrier

EFT/B immunity
(IEC1000-4-4)

2 kV, 5 kHz

Surge transient immunity
(IEC1000-4-5)

1 kV galvanic gun

Conducted RF immunity
(IEC1000-4-6)

10 V, 0.15…80 MHz(2) (3)

(1) Refer to the module’s Installation Instruction for exact operating temperature range.
(2) Conducted Immunity frequency range may be 150 kHz to 30 MHz if the Radiated Immunity frequency range is 30 MHz to 1000 MHz.
(3) For grounded thermocouples, the 10 V level is reduced to 3V.

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Specifications

Table A.20 General Specifications for Analog Modules
Specification

1762-IF2OF2

Shipping weight,
approx.
(with carton)

240 g (0.53 lbs.)

Bus current draw,
max.

40 mA at 5V dc
105 mA at 24V dc

Analog normal
operating range

1762-IF4

1762-OF4

1762-IR4

1762-IT4

235 g (0.517 lbs.)

260 g (0.57 lbs.)

220 g (0.53 lbs.)

40 mA at 5V dc
50 mA at 24V dc

40 mA at 5V dc
165 mA at 24V dc

40 mA at 5V dc
50 mA at 24V dc

40 mA at 5V dc
50 mA at 24V dc

Voltage: 0…10V dc
Current: 4…20 mA

Voltage: -10…+10V dc
Current: 4… 20 mA

Voltage 0…10V dc
Current: 4…20 mA

NA

NA

Full scale(1) analog
ranges

Voltage: 0…10.5V dc
Current: 0…21 mA

Voltage:
-10.5…+10.5V dc
Current: -21…+21 mA

Voltage: 0…10.5V dc
Current: 0…21 mA

NA

NA

Resolution

12 bits (unipolar)

15 bits (bipolar)(4)

12 bits (unipolar)

Input filter and
configuration
dependent

15 bits plus sign

Repeatability(2)

±0.12%(4)

±0.12%(4)

±0.12%(4)

±0.1 °C (±0.18 °F) for See Table A.24
on page A-20.
Ni and NiFe
±0.2 °C (±0.36 °F) …
±0.2 °C (±0.36 °F) for
other RTD inputs
±0.04 ohm for 150
ohm resistances
±0.2 ohm for other
resistances

Input and output
group to system
isolation

30V ac/30V dc rated working voltage(3)
(N.E.C. Class 2 required)
(IEC Class 2 reinforced insulation)
type test: 500V ac or 707V dc for 1 minute

30V ac/30V dc rated
working voltage
(IEC Class 2 reinforced
insulation)
type test: 500V ac or
707V dc for 1 minute

30V ac/30V dc
working voltage
type test: 500V ac or
707V dc for 1 minute

30V ac/30V dc
working voltage
qualification
test: 720V dc for
1 minute

Vendor I.D. code

1

1

1

1

1

Product type code

10

10

10

10

10

Product code

75

67

66

65

64

(1) The over- or under-range flag comes on when the normal operating range (over/under) is exceeded. The module continues to convert the analog input up to the maximum
full scale range.
(2) Repeatability is the ability of the module to register the same reading in successive measurements for the same signal.
(3) Rated working voltage is the maximum continuous voltage that can be applied at the terminals with respect to earth ground.
(4) Only applicable to Series B I/O modules.

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Specifications

A-17

Table A.21 Input Specifications
Specification

1762-IF2OF2

1762-IF4

1762-IR4

1762-IT4

Number of inputs

2 differential (unipolar)

4 differential (bipolar)

4

4 input channels plus 1
CJC sensor

Update time (typical)

2.5 ms

130, 250, 290, 450,
530 ms (selectable)

Input filter and
configuration dependent

NA

A/D converter type

Successive
approximation

Successive
approximation

Delta-Sigma

Delta-Sigma

Common mode voltage
range(1)

±27 V

±27 V

NA

±10 V

Common mode
rejection(2)

> 55 dB at 50 and 60 Hz

> 55 dB at 50 and 60 Hz

>110 dB at 50 Hz
(with 10 or 50 Hz filter)
>110 dB at 60 Hz
(with 10 or 60 Hz filter)

>110 dB at 50 Hz
(with 10 or 50 Hz filter)
>110 dB at 60 Hz
(with 10 or 60 Hz filter)

Non-linearity (in percent
full scale)

±0.12% (4)

±0.12% (4)

±0.05%

NA

±0.32% full scale at
-20…65 °C
(-4 …149 °F)(4)
±0.24% full scale at
25 °C (77 °F)

±0.5 °C (32.9 °F) for
Pt 385

NA

Typical overall accuracy(3) ±0.55% full scale at
-20…65 °C
(-4 …149 °F)(4)
±0.3% full scale at
25 °C (77 °F)
Input impedance

Voltage Terminal: 200 kΩ Voltage Terminal: 200 kΩ >10 ΜΩ
Current Terminal: 250 Ω Current Terminal: 275 Ω

>10 ΜΩ

Current input protection

±32 mA

±32 mA

NA

NA

Voltage input protection

±30 V

±30 V

NA

NA

Channel diagnostics

Over or under range or
open circuit condition by
bit reporting for analog
inputs.

Over or under range or
open circuit condition by
bit reporting for analog
inputs.

Over or under range or
open circuit condition by
bit reporting for analog
inputs.

Over or under range or
open circuit condition by
bit reporting for analog
inputs.

(1) For proper operation, both the plus and minus input terminals must be within ±27V (±10V for 1762-IT4) of analog common.
(2) Vcm = 1 Vpk-pk AC
(3) Vcm = 0 (includes offset, gain, non-linearity and repeatability error terms)
(4) Only applicable to Series B I/O modules.

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Specifications

Table A.22 Input Specifications 1762-IR4
Specification
Input types

1762-IR4
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•

100 Ω Platinum 385
200 Ω Platinum 385
500 Ω Platinum 385
1000 Ω Platinum 385
100 Ω Platinum 3916
200 Ω Platinum 3916
500 Ω Platinum 3916
1000 Ω Platinum 3916
10 Ω Copper 426
120 Ω Nickel 672
120 Ω Nickel 618
604 Ω Nickel-Iron 518
0…150 Ω
0…500 Ω
0…1000 Ω
0…3000 Ω

Heat dissipation

1.5 Total Watts (The Watts per point, plus the minimum Watts, with all points enabled.)

Normal mode rejection ratio

70 dB minimum at 50 Hz with the 10 or 50 Hz filter selected
70 dB minimum at 60 Hz with the 10 or 60 Hz filter selected

Typical accuracy
[Autocalibration enabled] at 25 °C (77 °F)
ambient with module operating
temperature at
25 °C (77 °F) (1)

±0.5 °C (32.9 °F) for Pt 385
±0.4 °C (32.72 °F) for Pt 3916
±0.2 °C (32.36 °F) for Ni
±0.3 °C (32.54 °F) for NiFe
±0.6 °C (33.08 °F) for Cu

±0.15 Ω for 150 Ω range
±0.5 Ω for 500 Ω range
±1.0 Ω for 1000 Ω range
±1.5 Ω for 3000 Ω range

Typical accuracy
[Autocalibration enabled] at 0…55 °C
(32…131 °F)(1)

±0.9 °C (33.62 °F) for Pt 385
±0.8 °C (33.44 °F) for Pt 3916
±0.4 °C (32.72 °F) for Ni
±0.5 °C (32.9 °F) for NiFe
±1.1 °C (33.98 °F) for Cu

±0.25 Ω for 150 Ω range
±0.8 Ω for 500 Ω range
±1.5 Ω for 1000 Ω range
±2.5 Ω for 3000 Ω range

Accuracy drift at 0…55 °C
(32…131 °F)

±0.026 °C/°C (0.026 °F/°F) for Pt 385
±0.023 °C/°C (0.023 °F/°F) for
Pt 3916
±0.012 °C/°C (0.012 °F/°F) for Ni
±0.015 °C/°C (0.015 °F/°F) for NiFe
±0.032 °C/°C (0.032 °F/°F) for Cu

±0.007 Ω/°C (0.012 Ω/°F) for 150 Ω range
±0.023 Ω/°C (0.041 Ω/°F) for 500 Ω range
±0.043 Ω/°C (0.077 Ω/°F) for 1000 Ω range
±0.072 Ω/°C (0.130 Ω/°F) for 3000 Ω range

Excitation current source

0.5 mA and 1.0 mA selectable per channel

Open-circuit detection time(2)

6…1212 ms

Input channel configuration

Via configuration software screen or the user program (by writing a unique bit pattern into the
module’s configuration file). Refer to your controller’s user manual to determine if user
program configuration is supported.

Calibration

The module performs autocalibration on channel enable and on a configuration change
between channels. You can also program the module to calibrate every five minutes.

Maximum overload at input terminals

±35V dc continuous

Cable impedance, max.

25 Ω (Operating with >25 Ω will reduce accuracy.)

Power supply distance rating

6 (The module may not be more than 6 modules away from the system power supply.)

Channel to channel isolation

±10V dc

(1) Accuracy is dependent upon the Analog/Digital converter filter rate selection, excitation current selection, data format, and input noise.
(2) Open-circuit detection time is equal to channel update time.

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Specifications

A-19

Table A.23 Input Specifications 1762-IT4
Specification

Value

Heat dissipation

1.5 Total Watts (The Watts per point, plus the
minimum Watts, with all points energized.)

Response speed per channel

Input filter and configuration dependent.

Rated working voltage(1)

30V ac/30V dc

Normal mode rejection ratio

85 dB (minimum) at 50 Hz (with 10 Hz or 50 Hz filter)
85 dB (minimum) at 60 Hz (with 10 Hz or 60 Hz filter)

Maximum cable impedance

25 Ω (for specified accuracy)

Open-circuit detection time

7 ms to 1.515 seconds(2)

Calibration

The module performs autocalibration upon power-up
and whenever a channel is enabled. You can also
program the module to calibrate every five minutes.

CJC accuracy

±1.3 °C (±2.34 °F)

Maximum overload at input
terminals

±35V dc continuous(3)

Input channel configuration

via configuration software screen or the user program
(by writing a unique bit pattern into the module’s
configuration file).

(1) Rated working voltage is the maximum continuous voltage that can be applied at the input terminal, including
the input signal and the value that floats above ground potential (for example, 30V dc input signal and 20V dc
potential above ground).
(2) Open-circuit detection time is equal to the module scan time, which is based on the number of enabled
channels, the filter frequency of each channel, and whether cyclic calibration is enabled.
(3) Maximum current input is limited due to input impedance.

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Specifications

Table A.24 1762-IT4 Repeatability at 25°C (77°F)(1) (2)
Input Type

Repeatability for
10 Hz Filter

Thermocouple J

±0.1 °C [±0.18 °F]

Thermocouple N (-110…1300 °C [-166…2372 °F])

±0.1 °C [±0.18 °F]

Thermocouple N (-210…110 °C [-346…166 °F])

±0.25 °C [±0.45 °F]

Thermocouple T (-170…400 °C [-274…752 °F])

±0.1 °C [±0.18 °F]

Thermocouple T (-270…170 °C [-454…274 °F])

±1.5 °C [±2.7 °F]

Thermocouple K (-270…1370 °C [-454…2498 °F])

±0.1 °C [±0.18 °F]

Thermocouple K (-270…170 °C [-454…274 °F])

±2.0 °C [±3.6 °F]

Thermocouple E (-220…1000 °C [-364…1832 °F])

±0.1 °C [±0.18 °F]

Thermocouple E (-270…220 °C [-454…364 °F])

±1.0 °C [±1.8 °F]

Thermocouples S and R

±0.4 °C [±0.72 °F]

Thermocouple C

±0.2 °C [±0.36 °F]

Thermocouple B

±0.7 °C [±1.26 °F]

±50 mV

±6 μV

±100 mV

±6 μV

(1) Repeatability is the ability of the input module to register the same reading in successive measurements for the
same input signal.
(2) Repeatability at any other temperature in the 0 to 60°C (32 to 140°F) range is the same as long as the
temperature is stable.

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Specifications

A-21

Table A.25 1762-IT4 Accuracy
With Autocalibration Enabled

Input Type(1)

Without Autocalibration

Accuracy
for 10 Hz, 50 Hz and 60
Hz Filters (max.)

Maximum Temperature
Drift(2) (4)

at 25 °C [77 °F]
Ambient

at 0 to 60 °C
[32 to 140 °F]
Ambient

at 0 to 60 °C [32 to 140 °F]
Ambient

Thermocouple J (-210…1200 °C [-346…2192 °F])

±0.6 °C [±1.1 °F]

±0.9 °C [±1.7 °F]

±0.0218 °C/°C [±0.0218 °F/°F]

Thermocouple N (-200…1300 °C [-328…2372 °F])

±1 °C [±1.8 °F]

±1.5 °C [±2.7 °F]

±0.0367 °C/°C [±0.0367 °F/°F]

Thermocouple N (-210…-200 °C [-346…-328 °F])

±1.2 °C [±2.2 °F]

±1.8 °C [±3.3 °F]

±0.0424 °C/°C [±0.0424 °F/°F]

Thermocouple T (-230…400 °C [-382…752 °F])

±1 °C [±1.8 °F]

±1.5 °C [±2.7 °F]

±0.0349 °C/°C [±0.0349 °F/°F]

Thermocouple T (-270…-230 °C [-454…-382 °F])

±5.4 °C [±9.8 °F]

±7.0 °C [±12.6 °F]

±0.3500 °C/°C [±0.3500 °F/°F]

Thermocouple K (-230…1370 °C [-382…2498 °F])

±1 °C [±1.8 °F]

±1.5 °C [±2.7 °F]

±0.4995 °C/°C [±0.4995 °F/°F]

Thermocouple K (-270…-225°C [-454…-373°F])

±7.5°C [±13.5°F]

±10°C [±18 °F]

±0.0378°C/°C [±0.0378°F/°F]

Thermocouple E (-210…1000°C [-346…1832°F])

±0.5°C [±0.9°F]

±0.8°C [±1.5 °F]

±0.0199°C/°C [±0.0199°F/°F]

Thermocouple E (-270…-210 °C [-454…-346 °F])

±4.2 °C [±7.6 °F]

±6.3 °C [±11.4 °F]

±0.2698 °C/°C [±0.2698 °F/°F]

Thermocouple R

±1.7 °C [±3.1 °F]

±2.6 °C [±4.7 °F]

±0.0613 °C/°C [±0.0613 °F/°F]

Thermocouple S

±1.7 °C [±3.1 °F]

±2.6 °C [±4.7 °F]

±0.0600 °C/°C [±0.0600 °F/°F]

Thermocouple C

±1.8 °C [±3.3 °F]

±3.5 °C [±6.3 °F]

±0.0899 °C/°C [±0.0899 °F/°F]

Thermocouple B

±3.0 °C [±5.4 °F]

±4.5 °C [±8.1 °F]

±0.1009 °C/°C [±0.1009 °F/°F]

±50 mV

±15 μV

±25 μV

±0.44μV/°C [±0.80μV/°F]

±100 mV

±20 μV

±30 μV

±0.69μV/°C [±01.25μV/°F]

(2) (3)

(1) The module uses the National Institute of Standards and Technology (NIST) ITS-90 standard for thermocouple linearization.
(2) Accuracy and temperature drift information does not include the affects of errors or drift in the cold junction compensation circuit.
(3) Accuracy is dependent upon the analog/digital converter output rate selection, data format, and input noise.
(4) Temperature drift with autocalibration is slightly better than without autocalibration.

TIP

For more detailed 1762-IT4 accuracy information, see
publication 1762-UM002.

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A-22

Specifications

Table A.26 Output Specifications
Specification

1762-IF2OF2

1762-OF4

Number of outputs

2 single-ended (unipolar)

4 single-ended (unipolar)(2)

Update time (typical)

4.5 ms

D/A converter type

Resistor string

R-2R Ladder Voltage Switching

Resistive load on current output

0…500 Ω (includes wire resistance)

0…500 Ω (includes wire resistance)

Load range on voltage output

> 1 kΩ

> 1 kΩ

Reactive load, current output

< 0.1 mH

< 0.1 mH

Reactive load, voltage output

< 1 μF

< 1 μF

Typical overall accuracy(1)

±1.17% full scale at -20…65 °C
(-4…149 °F)(2)
±0.5% full scale at 25 °C (77 °F)

±1.17% full scale at -20…65 °C
(-4…149 °F)(2)
±0.5% full scale at 25 °C (77 °F)

Output ripple range 0 to 500 Hz
(referred to output range)

< ±0.1%

< ±0.1%

Non-linearity (in percent full scale)

< ±0.59%(2)

< ±0.59%(2)

Open and short-circuit protection

Continuous

Continuous

Output protection

±32 mA

±32 mA

Heat dissipation

2.6 W

2.8 W

(1) Includes offset, gain, non-linearity and repeatability error terms.
(2) Only applicable to Series B I/O modules.

Table A.27 Valid Input/Output Data Word Formats/Ranges for 1762-IF2OF2
Normal Operating Range

Full Scale Range

RAW/Proportional Data

Scaled-for-PID

0…0V dc

10.5V dc

32760

16380

0.0V dc

0

0

21.0 mA

32760

16380

20.0 mA

31200

15600

4.0 mA

6240

3120

0.0 mA

0

0

4… 20 mA

Publication 1762-UM001H-EN-P - June 2015

Specifications

A-23

Combination Module DC-Input/Relay Output
Table A.28 DC-Input/Relay-Output Combination Module - 1762-IQ80W6 Input
Specifications
Specification

Value

Voltage category

24V dc (Sink/Source)(1)

Operating voltage range

10…30V dc @ 30 °C (86 °F)
10…26.4V dc @ 65 °C (149 °F)

Number of inputs

8

On-state voltage, min.

10V dc

Off-state voltage, max.

5V dc

On-state current, min.

2.0 mA

Off-state current, max.

1.5 mA

Inrush current, max.

250 mA

Nominal impedance

3 kΩ

Input compatibility

IEC Type 1+

Signal delay time, max.

On-delay: 8 ms
Off-delay: 8 ms

(1) Sinking/Sourcing Inputs - Sinking/Sourcing describes the current flow between the I/O module and the field
device. Sourcing I/O circuits supply (source) current to sinking field devices. Sinking I/O circuits are driven by
a current sourcing field device. Field devices connected to the negative side (DC Common) of the field power
supply are sinking field devices. Field devices connected to the positive side (+V) of the field supply are
sourcing field devices.

Table A.29 DC-Input/Relay-Output Combination Module - 1762-IQ80W6 Output
Specifications
Specification

Value

Voltage range

5…265V ac
5…125V dc

Commons per module

6

Output type

6-Form A (normally open)

Signal delay time

On-delay: 10 mS (max) Off-delay: 10 mS (max)

Off leakage current

0 mA

On-state current, min.

10 mA @ 5V dc

Continuous current per
point

See table on page A-24.

Continuous current per
module

8A

Total controlled load

1440VA/Module max

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A-24

Specifications

Table A.30 DC-Input/Relay-Output Combination Module - 1762-IQ80W6 Relay
Contact Ratings
Volts
(max.)

Continuous
Amps per
Point (Max.)

Make

Break

Make

Break

240V ac

2.5 A

7.5 A

0.75 A

1800VA

180VA

15 A

1.5 A

Voltamperes

Amperes(1)

120V ac
125V dc

1.0 A

0.22 A(2)

28VA(2)

24V dc

2.0 A

1.2 A

28VA(2)

(1) Surge Suppression - Connecting surge suppressors across your external inductive load will extend the life of
the relay contacts. For additional details, refer to Industrial Automation Wiring and Grounding Guidelines,
publication 1770-4.1.
(2) For dc voltage applications, the make/break ampere rating for relay contacts can be determined by dividing
28VA by the applied dc voltage. For example, 28VA/48V dc = 0.58 A. For dc voltage applications less than 14 V,
the make/break rating for relay contacts cannot exceed 2 A.

Table A.31 DC-Input/Relay-Output Combination Module - 1762-IQ80W6 General
Specifications
Specification

Value

Dimensions

90 mm (height) x 87 mm (depth) x 40.4 mm (width)
height including mounting tabs is 110 mm
3.54 in. (height) x 3.43 in. (depth) x 1.59 in. (width)
height including mounting tabs is 4.33 in.

Publication 1762-UM001H-EN-P - June 2015

Shipping weight, approx.
(with carton)

280 g (0.62 lbs.)

Bus current draw, max.

110 mA @ 5V dc
80 mA @ 24V dc

Heat dissipation

5.0 W @ 30V dc
4.4 W @ 26.4V dc
(The Watts per point, plus the minimum W, with all points
energized.)

Power supply distance
rating

6

Isolated group

Group 1 (input 0…3)
Group 2 (input 4…7)
Group 3 (output 0…5)

Vibration

Operating: 10 to 500 Hz, 5G, 0.030 in. max. peak-to-peak,
2 hours per axis.
Relay Operation: 1.5 G

Shock

Operating: 30G panel mounted, 3 pulses per axis
Relay Operation: 7G
Non-Operating: 50G panel mounted, 3 pulses per axis
(40G DIN Rail mounted)

Specifications

A-25

Table A.31 DC-Input/Relay-Output Combination Module - 1762-IQ80W6 General
Specifications
Specification

Value

Vendor ID code

1

Product type code

7

Product code

98

Table A.32 DC-Input/Relay-Output Combination Module - 1762-IQ80W6
Environmental Specifications
Specification

Value

Temperature range, operating

-20…+65 °C (-4…+149 °F)

Temperature range, storage

-40…+85 °C (-40…+185 °F)

Operating humidity

5…95% non-condensing

Operating altitude

2000 m (6561 ft)

Table A.33 Certifications
Certification

Value

Agency certification

C-UL certified (under CSA C22.2 No. 142)
UL 508 listed
CE compliant for all applicable directives

Hazardous environment class

Class I, Division 2, Hazardous Location,
Groups A, B, C, D (UL 1604, C-UL under
CSA C22.2 No. 213)

Radiated and conducted emissions

EN50081-2 Class A

Electrical/EMC:

The module has passed testing at the
following levels:

ESD immunity (IEC1000-4-2)

4 kV contact, 8 kV air, 4 kV indirect

Radiated RF immunity
(IEC1000-4-3)

10 V/m, 80…1000 MHz, 80% amplitude
modulation, +900 MHz keyed carrier

EFT/B immunity (IEC1000-4-4)

2 kV, 5 kHz

Surge transient immunity
(IEC1000-4-5)

2 kV common mode, 1 kV differential
mode

Conducted RF immunity
(IEC1000-4-6)

10V, 0.15…80 MHz(1)

(1) Conducted Immunity frequency range may be 150 kHz to 30 MHz if the Radiated Immunity frequency
range is 30…1000 MHz.

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A-26

Specifications

Notes:

Publication 1762-UM001H-EN-P - June 2015

Appendix

B

1762 Replacement Parts

MicroLogix 1200 RTB
Replacement Kit

The 40-point controller removable terminal blocks kit (catalog number
1762-RPLRTB40) consists of:
• one 25-point double row terminal block
• one 29-point double row terminal block
(Both are terminal blocks for a 40-point controller.)

1

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B-2

1762 Replacement Parts

Notes:

Publication 1762-UM001H-EN-P - June 2015

Appendix

C

Troubleshoot Your System
This chapter describes how to troubleshoot your controller. Topics include:
•
•
•
•

Interpret LED Indicators

understanding the controller LED status
controller error recovery model
analog expansion I/O diagnostics and troubleshooting
calling Rockwell Automation for assistance

The controller status LEDs provide a mechanism to determine the current
status of the controller if a programming device is not present or available.

Figure C.1 Controller LED Location
Table C.1 Controller LED Indicators
POWER
RUN
FAULT
FORCE
COMM 0
DCOMM
IN

LED

Color

Indicates

POWER

off

No input power, or power error condition

green

Power on

RUN

off

Not executing the user program

0

1

2

3

4

5

6

7

8

9 10 11 12 13

green

Executing the user program in run mode

0

1

2

3

4

5

6

7

8

9

green flashing

Memory module transfer occurring

off

No fault detected

red flashing

Application fault detected

red

Controller hardware faulted

off

No forces installed

OUT

FAULT

FORCE
COMM 0(1)
DCOMM(2)
INPUTS
OUTPUTS

amber

Forces installed

off

Not transmitting via RS-232 port

green

Transmitting via RS-232 port

off

Configured communications

green

Default communications

off

Input is not energized

amber

Input is energized (terminal status)

off

Output is not energized

amber

Output is engerized (logic status)

(1) 1762-L24AWAR, -L24BWAR, -L24BXBR, -L40AWAR, -L40BWAR, -L40BXBR controllers are equipped with an
additional communications port (Programmer/HMI Port) but provide no additional LED indictor indicating its
operational status.
(2) When using a 1762-L24AWAR, -L24BWAR, -L24BXBR, -L40AWAR, -L40BWAR, or -L40BXBR controller, the
DCOMM LED applies only to Channel 0.

1

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C-2

Troubleshoot Your System

Normal Operation
The POWER and RUN LEDs are on. If a force condition is active, the
FORCE LED turns on and remains on until all forces are removed.

Error Conditions
If an error exists within the controller, the controller LEDs operate as
described in the following table.

If the
LEDS
indicate

The Following Error Probable Cause
Exists

All LEDs off No input power or
power supply error

Recommended Action

No line Power

Verify proper line voltage and connections to the controller.

Power Supply
Overloaded

This problem can occur intermittently if power supply is overloaded when
output loading and temperature varies.

Processor Hardware
Error

Cycle power. Contact your local Allen-Bradley representative if the error
persists.

Loose Wiring

Verify connections to the controller.

Power and
FAULT
LEDs on
solid

Hardware faulted

Power LED
on and
FAULT LED
flashing

Application fault

Hardware/Software
Major Fault Detected

For error codes and Status File information, see MicroLogix 1200 and 1500
Programmable Controllers Instruction Set Reference Manual, Publication
1762-RM001.

RUN

Operating system
fault

Missing or Corrupt
Operating System

See Missing/Corrupt OS LED Pattern on page D-2.

FORCE
FAULT
LEDs all
flashing

Publication 1762-UM001H-EN-P - June 2015

Troubleshoot Your System

Controller Error Recovery
Model

Identify the error code and
description.

No

C-3

Use the following error recovery model to help you diagnose software and
hardware problems in the micro controller. The model provides common
questions you might ask to help troubleshoot your system. Refer to the
recommended pages within the model for further help.

Is the error
hardware related?

Start

Yes
Refer to page C-2 for
probable cause and
recommended action.

No

Are the wire
connections tight?

Tighten wire connections.

Yes

Clear Fault.

Is the Power
LED on?

No

Does the
controller have
power supplied?

Is the RUN
LED on?

Refer to page C-2 for
probable cause and
recommended action.

No

Yes
Return controller to RUN or
any of the REM test modes.

Is the Fault
LED on?
Yes

Test and verify system
operation.

Check power.

Yes

Yes
Correct the condition
causing the fault.

No

Refer to page C-2 for
probable cause and
recommended action.

No

Is an input LED
accurately showing
status?

No

Yes
Refer to page C-2 for
probably cause and
recommended action.

End

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C-4

Troubleshoot Your System

Analog Expansion I/O
Diagnostics and
Troubleshooting

Module Operation and Channel Operation
The module performs operations at two levels:
• module level
• channel level
Module-level operations include functions such as power-up, configuration,
and communication with the controller.
Internal diagnostics are performed at both levels of operation. Both module
hardware and channel configuration error conditions are reported to the
controller. Channel over-range or under-range conditions are reported in the
module’s input data table. Module hardware errors are reported in the
controller’s I/O status file. Refer to the MicroLogix 1200 and 1500
Programmable Controllers Instruction Set Reference Manual, publication
1762-RM001 for more information.
When a fault condition is detected, the analog outputs are reset to zero.

Power-up Diagnostics
At module power-up, a series of internal diagnostic tests are performed.
Table C.2 Module Status LED State Table

Publication 1762-UM001H-EN-P - June 2015

If module
status LED is

Indicated
condition

Corrective action

On

Proper Operation

No action required.

Off

Module Fault

Cycle power. If condition persists, replace the
module. Call your local distributor or
Allen-Bradley for assistance.

Troubleshoot Your System

C-5

Critical and Noncritical Errors
Noncritical module errors are recoverable. Channel errors (over-range or
under-range errors) are noncritical. Noncritical error conditions are indicated
in the module input data table. Noncritical configuration errors are indicated
by the extended error code.
See Table C.5 on page C-7.
Critical module errors are conditions that prevent normal or recoverable
operation of the system. When these types of errors occur, the system leaves
the run mode of operation.
Critical module errors are indicated in Table C.5 on page C-7.

Module Error Definition Table
Analog module errors are expressed in two fields as four-digit Hex format
with the most significant digit as ‘don’t care’ and irrelevant. The two fields are
‘Module Error’ and ‘Extended Error Information’. The structure of the
module error data is shown below.
Table C.3 Module Error Table
‘Don’t Care’ Bits

Module Error

Extended Error Information

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Hex Digit 4

Hex Digit 3

Hex Digit 2

Hex Digit 1

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C-6

Troubleshoot Your System

Module Error Field
The purpose of the module error field is to classify module errors into three
distinct groups, as described in the table below. The type of error determines
what kind of information exists in the extended error information field. These
types of module errors are typically reported in the controller’s I/O status file.
Refer to the MicroLogix 1200 and 1500 Programmable Controllers Instruction
Set Reference Manual, publication 1762-RM001 for more information.
.
Table C.4 Module Error Types
Error Type

Module Error Field Value Description
Bits 11 through 09
(Binary)

No Errors

000

No error is present. The extended error field holds no additional information.

Hardware Errors

001

General and specific hardware error codes are specified in the extended error
information field.

Configuration Errors

010

Module-specific error codes are indicated in the extended error field. These error
codes correspond to options that you can change directly. For example, the input
range or input filter selection.

Extended Error Information Field
Check the extended error information field when a non-zero value is present
in the module error field. See Table C.5 on page C-7.

TIP

If no errors are present in the module error field, the
extended error information field is set to zero.

Hardware Errors
General or module-specific hardware errors are indicated by module error
code 2. See Table C.5.

Configuration Errors
If you set the fields in the configuration file to invalid or unsupported values,
the module ignores the invalid configuration, generates a non-critical error,
and keeps operating with the previous configuration.
The table below lists the configuration error codes defined for the module.

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Troubleshoot Your System

C-7

Error Codes
Table C.5 Extended Error Codes for 1762-IF2OF2
Error Type

Hex
Equivalent(1)

Module
Extended Error Error Description
Error Code Information Code
Binary

Binary

No Error

X000

000

0 0000 0000

No error

General Common
Hardware Error

X200

001

0 0000 0000

General hardware error; no additional information

X201

001

0 0000 0001

Power-up reset state

Hardware-Specific X210
Error

001

0 0001 0000

Reserved

Configuration Error X400

010

0 0000 0000

General configuration error; no additional information

X401

010

0 0000 0001

Invalid input data format selected (channel 0)

X402

010

0 0000 0010

Invalid input data format selected (channel 1)

X403

010

0 0000 0011

Invalid output data format selected (channel 0)

X404

010

0 0000 0100

Invalid output data format selected (channel 1)

(1) X represents ‘Don’t Care’.

Table C.6 Extended Error Codes for 1762-IF4 and 1762-OF4
Error Type

Hex
Equivalent(1)

Module
Extended Error Error Description
Error Code Information Code
Binary

Binary

No Error

X000

000

0 0000 0000

No error

General Common
Hardware Error

X200

001

0 0000 0000

General hardware error; no additional information

X201

001

0 0000 0001

Power-up reset state

X300

001

1 0000 0000

Reserved

Configuration Error X400

010

0 0000 0000

General configuration error; no additional information

X401

010

0 0000 0001

Invalid range select (Channel 0)

X402

010

0 0000 0010

Invalid range select (Channel 1)

X403

010

0 0000 0011

Invalid range select (Channel 2)

X404

010

0 0000 0100

Invalid range select (Channel 3)

X405

010

0 0000 0101

Invalid filter select (Channel 0) – 1762-IF4 only

X406

010

0 0000 0110

Invalid filter select (Channel 1) – 1762-IF4 only

X407

010

0 0000 0111

Invalid filter select (Channel 2) – 1762-IF4 only

X408

010

0 0000 1000

Invalid filter select (Channel 3) – 1762-IF4 only

X409

010

0 0000 1001

Invalid format select (Channel 0)

X40A

010

0 0000 1010

Invalid format select (Channel 1)

X40B

010

0 0000 1011

Invalid format select (Channel 2)

X40C

010

0 0000 1100

Invalid format select (Channel 3)

HardwareSpecific Error

(1) X represents ‘Don’t Care’.

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C-8

Troubleshoot Your System

Call Rockwell Automation
for Assistance

If you need to contact Rockwell Automation or local distributor for assistance,
it is helpful to obtain the following (prior to calling):
• controller type, series letter, revision letter, and firmware (FRN) number
of the controller
• controller LED status
• controller error codes (Refer to MicroLogix 1200 and 1500
Programmable Controllers Instruction Set Reference Manual,
Publication 1762-RM001 for error code information.)

Publication 1762-UM001H-EN-P - June 2015

Appendix

D

Use Control Flash to Upgrade Your Operating
System

The operating system (OS) can be upgraded through the communication port
on the controller. In order to download a new operating system, you must have
the following:
• ControlFlash Upgrade Kit containing the new OS
Go to http://www.ab.com/micrologix to download the upgrade kit.
• a Windows 95, Windows 98, Windows 2000 or
Windows NT based computer to run the download software.
The ControlFlash Upgrade Kit includes:
• the operating system upgrade to be downloaded
• the ControlFlash programming tool, along with its support drivers and
on-line help
• a readme first file explaining how to upgrade the operating system

Prepare for Upgrade

Before upgrading the controller’s operating system, you must:
• install ControlFlash software on your personal computer
• prepare the controller for updating
IMPORTANT

Installing a new operating system deletes the user
program. After the operating system upgrade is
successful, you must transfer your control program
back to the controller. The communication
parameters are described on Table 4.1 on page 4-2.

Install ControlFlash Software
For 1762-Lxxxxx controllers, double click the 1762-LSC-FRNxx.exe file to
install the operating system upgrade (where xx is the firmware revision
number).
For 1762-LxxxxxR controllers, double click the 1762-LRC-FRNxx.exe file to
install the operating system upgrade.

1

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D-2

Use Control Flash to Upgrade Your Operating System

Prepare the Controller for Updating
Controller Configuration
The controller must be configured for default communications (use
communications toggle push button; DCOMM LED on) and be in the
Program mode to allow the download of a new operating system.

Sequence of Operation

The following steps detail the key events in the upgrade process.
1. Controller mode and communications parameters are checked.
2. Download begins.
3. During the download, the Force, Battery, and Comms LEDs perform a
walking bit pattern.
4. When the download is complete, the integrity of the new OS is checked.
If the new OS is corrupt, the controller sends an error message to the
download tool and flashes the Missing or Corrupt OS LED pattern. See
Missing/Corrupt OS LED Pattern below.
5. Following a successful transfer, the Power, Force, and Battery LEDs
flash on and remain on for five seconds. Then the controller resets.

Missing/Corrupt OS LED
Pattern

Publication 1762-UM001H-EN-P - June 2015

When an operating system download is not successful or if the controller does
not contain a valid operating system, the controller flashes the Run, Force, and
Fault LEDS on and off.

Appendix

E

Connect to Networks via RS-232 Interface

The following protocols are supported from the RS-232 communication
channel:
•
•
•
•
•

RS-232 Communication
Interface

DF1 Full-duplex
DF1 Half-duplex
DH-485
Modbus
ASCII

The communications port on the MicroLogix 1200 utilizes an RS-232
interface. RS-232 is an Electronics Industries Association (EIA) standard that
specifies the electrical and mechanical characteristics for serial binary
communication. It provides you with a variety of system configuration
possibilities. (RS-232 is a definition of electrical characteristics; it is not a
protocol.)
One of the biggest benefits of an RS-232 interface is that it lets you integrate
telephone and radio modems into your control system (using the appropriate
DF1 protocol only, not DH-485 protocol).

DF1 Full-duplex Protocol

DF1 Full-duplex protocol provides a point-to-point connection between two
devices. DF1 Full-duplex protocol combines data transparency (American
National Standards Institute ANSI - X3.28-1976 specification subcategory
D1) and 2-way simultaneous transmission with embedded responses
(subcategory F1).
The MicroLogix 1200 controllers support the DF1 Full-duplex protocol via
RS-232 connection to external devices, such as computers, or other controllers
that support DF1 Full-duplex.
DF1 is an open protocol. Refer to DF1 Protocol and Command Set Reference
Manual, publication 1770-6.5.16, for more information.
DF1 Full-duplex protocol (also referred to as DF1 point-to-point protocol) is
useful where RS-232 point-to-point communication is required. DF1 protocol
controls message flow, detects and signals errors, and retries if errors are
detected.

1

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E-2

Connect to Networks via RS-232 Interface

Example DF1 Full-duplex Connections
For information about required network connecting equipment, see Chapter 4,
Communication Connections.
1761-CBL-AM00 or 1761-CBL-HM02
Personal Computer
MicroLogix 1200
TERM
A
B
COM
SHLD
CHS GND

TX

TX

Personal Computer

TX

PWR

DC SOURCE
CABLE

EXTERNAL

Optical
Isolator

Modem cable
1761-CBL-PM02

Modem

MicroLogix 1200
Optical Isolator
TERM
A
B
COM
SHLD
CHS GND

Modem

TX

TX

TX

PWR

DC SOURCE
CABLE

EXTERNAL

1761-CBL-PM02

We recommend using an AIC+, catalog number 1761-NET-AIC, as your
optical isolator.

DF1 Half-duplex Protocol

DF1 Half-duplex protocol is a multi-drop single master/multiple slave
network. DF1 Half-duplex protocol supports data transparency (American
National Standards Institute ANSI - X3.28-1976 specification subcategory
D1). In contrast to DF1 Full-duplex, communication takes place in one
direction at a time. You can use the RS-232 port on the MicroLogix 1200 as
both a Half-duplex programming port and a Half-duplex peer-to-peer
messaging port.
MicroLogix 1200 can act as the master or as a slave on a Half-duplex network.
When the MicroLogix 1200 is a slave device, a master device is required to
‘run’ the network. Several other Allen-Bradley products support DF1
Half-duplex master protocol. They include the SLC 5/03 and higher
processors, enhanced PLC-5 processors and Rockwell Software RSLinx
(version 2.x and higher).
DF1 Half-duplex supports up to 255 devices (address 0 to 254) with address
255 reserved for master broadcasts. As a DF1 Half-duplex slave device, the
MicroLogix 1200 supports broadcast reception. As a DF1 Half-duplex master,
the MicroLogix 1200 supports both the reception and initiation of broadcast
write commands (via the MSG instruction). The MicroLogix 1200 also
supports Half-duplex modems using RTS/CTS hardware handshaking.

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E-3

Example DF1 Half-duplex Connections

Rockwell Software RSLinx 2.0 (or
higher), SLC 5/03, SLC 5/04, and
SLC 5/05, or PLC-5 processors
configured for DF1 Half-duplex
Master.

TERM

Modem

TERM

A

TERM

A

B

A

B

COM

B

COM

SHLD

COM

SHLD

CHS GND

TX

TX

RS-232
(DF1 Half-duplex Protocol)

SHLD

CHS GND

TX

TX

PWR

TX

DC SOURCE

CHS GND

TX

TX

PWR

TX

DC SOURCE

CABLE

EXTERNAL

PWR

CABLE

EXTERNAL

MicroLogix
1000 (Slave)

TX

DC SOURCE

CABLE

EXTERNAL

MicroLogix
1200 (Slave)

MicroLogix
1500 (Slave)

SLC 5/04 (Slave)

SLC 5/03 with
1747-KE Interface
Module (Slave)

Use Modems with MicroLogix 1200 Programmable Controllers
The types of modems you can use with MicroLogix 1200 controllers include
the following:
• dial-up phone modems
A MicroLogix 1200 controller, on the receiving end of the dial-up
connection, can be configured for DF1 Full-duplex protocol with or
without handshaking. The modem connected to the MicroLogix
controller should support auto-answer. The MicroLogix 1200 supports
ASCII out communications. Therefore, it can cause a modem to initiate
or disconnect a phone call.
• leased-line modems
Leased-line modems are used with dedicated phone lines that are
typically leased from the local phone company. The dedicated lines may
be in a point-to-point topology supporting Full-duplex communications
between two modems or in a multi-drop topology supporting
Half-duplex communications between three or more modems.

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Connect to Networks via RS-232 Interface

• radio modems
Radio modems may be implemented in a point-to-point topology
supporting either Half-duplex or Full-duplex communications, or in a
multi-drop topology supporting Half-duplex communications between
three or more modems. MicroLogix 1200 also supports DF1 Radio
Modem protocol.
• line drivers
Line drivers, also called short-haul modems, do not actually modulate
the serial data, but rather condition the electrical signals to operate
reliably over long transmission distances (up to several miles). Line
drivers are available in Full-duplex and Half-duplex models.
Allen-Bradley’s AIC+ Advanced Interface Converter is a Half-duplex
line driver that converts an RS-232 electrical signal into an RS-485
electrical signal, increasing the signal transmission distance from 50 to
4000 feet (8000 feet when bridged).
For point-to-point Full-duplex modem connections that do not require any
modem handshaking signals to operate, use DF1 Full-duplex protocol with no
handshaking. For point-to-point Full-duplex modem connections that require
RTS/CTS handshaking, use DF1 Full-duplex protocol with handshaking.
For radio modem connections, use DF1 Radio Modem protocol, especially if
store and forward capability is required.
For general multi-drop modem connections, or for point-to-point modem
connections that require RTS/CTS handshaking, use DF1 Half-duplex slave
protocol. In this case, one (and only one) of the other devices must be
configured for DF1 Half-duplex master protocol.

IMPORTANT

TIP

Publication 1762-UM001H-EN-P - June 2015

Never attempt to use DH-485 protocol through
modems under any circumstance.
All MicroLogix 1200 controllers support RTS/CTS
modem handshaking when configured for DF1
Full-duplex protocol with the control line parameter
set to Full-duplex Modem Handshaking or DF1
Half-duplex slave protocol with the control line
parameter set to ‘Half-duplex Modem’. No other
modem handshaking lines (Data Set Ready, Carrier
Detect and Data Terminal Ready) are supported by
any MicroLogix 1200 controllers.

Connect to Networks via RS-232 Interface

DH-485 Communication
Protocol

E-5

The DH-485 protocol defines the communication between multiple devices
that coexist on a single pair of wires. DH-485 protocol uses RS-485
Half-duplex as its physical interface. (RS-485 is a definition of electrical
characteristics; it is not a protocol.) RS-485 uses devices that are capable of
co-existing on a common data circuit, thus allowing data to be easily shared
between devices.
The DH-485 protocol supports two classes of devices: initiators and
responders. All initiators on the network get a chance to initiate message
transfers. To determine which initiator has the right to transmit, a token
passing algorithm is used.

Devices that use the DH-485 Network
In addition to the MicroLogix 1200 controllers, the devices shown in the
following table also support the DH-485 network.
Table E.1 Allen-Bradley Devices that Support DH-485 Communication
Catalog
Number
Bulletin 1761
Controllers
Bulletin 1764

Description

Installation Function

Publication

MicroLogix 1000

1761-6.3

Bulletin 1747
Processors
1746-BAS

SLC 500
Processors
BASIC Module

1785-KA5

DH+/DH-485
Gateway

2760-RB

Flexible Interface
Module

1784-KTX,
-KTXD

PC DH-485 IM

1784-PCMK

PCMCIA IM

1747-PT1

Hand-Held
Terminal

Series C or These controllers support DH-485 communications.
higher
Series A or These controllers support DH-485 communications.
higher
SLC Chassis These processors support a variety of I/O requirements and
functionality.
SLC Chassis Provides an interface for SLC 500 devices to foreign devices.
Program in BASIC to interface the 3 channels (2 RS232 and 1
DH-485) to printers, modems, or the DH-485 network for data
collection.
(1771) PLC
Provides communication between stations on the PLC-5 (DH+)
Chassis
and SLC 500 (DH-485) networks. Enables communication and
data transfer from PLC to SLC 500 on DH-485 network. Also
enables programming software programming or data acquisition
across DH+ to DH-485.
(1771) PLC
Provides an interface for SLC 500 (using protocol cartridge
Chassis
2760-SFC3) to other A-B PLCs and devices. Three configurable
channels are available to interface with Bar Code, Vision, RF,
Dataliner, and PLC systems.
IBM XT/AT Provides DH-485 using RSLinx.
Computer
Bus
PCMCIA slot Provides DH-485 using RSLinx.
in computer
and
Interchange
NA
Provides hand-held programming, monitoring, configuring, and
troubleshooting capabilities for SLC 500 processors.

MicroLogix 1500

1764-UM001
1747-UM011
1746-UM004
1746-PM001
1746-RM001
1785-6.5.5
1785-1.21

1747-6.12
2760-ND001

1784-6.5.22

1784-6.5.19

1747-NP002

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Connect to Networks via RS-232 Interface

Table E.1 Allen-Bradley Devices that Support DH-485 Communication
Catalog
Number
1747-DTAM,
2707-L8P1,
-L8P2, -L40P1,
-L40P2,
-V40P1,
-V40P2,
-V40P2N,
-M232P3, and
-M485P3
2711-K5A2,
-B5A2, -K5A5,
-B5A5, -K5A1,
-B5A1, -K9A2,
-T9A2, -K9A5,
-T9A5, -K9A1,
and -T9A1

Description

Installation Function

Publication

DTAM, DTAM
Plus, and DTAM
Micro Operator
Interfaces

Panel Mount Provides electronic operator interface for SLC 500 processors.

1747-6.1
2707-800,
2707-803

PanelView 550 and Panel Mount Provides electronic operator interface for SLC 500 processors.
PanelView 900
Operator Terminals

2711-UM014

NA = Not Applicable

Important DH-485 Network Planning Considerations
Carefully plan your network configuration before installing any hardware.
Listed below are some of the factors that can affect system performance:
• amount of electrical noise, temperature, and humidity in the network
environment
• number of devices on the network
• connection and grounding quality in installation
• amount of communication traffic on the network
• type of process being controlled
• network configuration
The major hardware and software issues you need to resolve before installing a
network are discussed in the following sections.

Hardware Considerations
You need to decide the length of the communication cable, where you route it,
and how to protect it from the environment where it will be installed.
When the communication cable is installed, you need to know how many
devices are to be connected during installation and how many devices will be
added in the future. The following sections help you understand and plan the
network.

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Connect to Networks via RS-232 Interface

E-7

Number of Devices and Length of Communication Cable
The maximum length of the communication cable is 1219 m (4000 ft). This is
the total cable distance from the first node to the last node in a segment.
However, two segments can be used to extend the DH-485 network to 2438 m
(8000 ft). For additional information on connections using the AIC+, refer to
the Advanced Interface Converter (AIC+) User Manual, publication
1761-UM004.

Planning Cable Routes
Follow these guidelines to help protect the communication cable from
electrical interference:
• Keep the communication cable at least 1.52 m (5 ft) from any electric
motors, transformers, rectifiers, generators, arc welders, induction
furnaces, or sources of microwave radiation.
• If you must run the cable across power feed lines, run the cable at right
angles to the lines.
• If you do not run the cable through a contiguous metallic wireway or
conduit, keep the communication cable at least
0.15 m (6 in.) from ac power lines of less than 20 A, 0.30 m (1 ft) from
lines greater than 20 A, but only up to 100 kVA, and 0.60 m (2 ft) from
lines of 100 kVA or more.
• If you run the cable through a contiguous metallic wireway or conduit,
keep the communication cable at least 0.08 m (3 in) from ac power lines
of less than 20 A, 0.15 m (6 in) from lines greater than 20 A, but only up
to 100 kVA, and 0.30 m (1 ft) from lines of 100 kVA or more.
Running the communication cable through conduit provides extra
protection from physical damage and electrical interference. If you route
the cable through conduit, follow these additional recommendations:
– Use ferromagnetic conduit near critical sources of electrical
interference. You can use aluminum conduit in non-critical areas.
– Use plastic connectors to couple between aluminum and
ferromagnetic conduit. Make an electrical connection around the
plastic connector (use pipe clamps and the heavy gauge wire or wire
braid) to hold both sections at the same potential.
– Ground the entire length of conduit by attaching it to the building
earth ground.
– Do not let the conduit touch the plug on the cable.
– Arrange the cables loosely within the conduit. The conduit should
contain only serial communication cables.

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Connect to Networks via RS-232 Interface

– Install the conduit so that it meets all applicable codes and
environmental specifications.
For more information on planning cable routes, see Industrial Automation
Wiring and Grounding Guidelines, publication Number 1770-4.1.

Software Considerations
Software considerations include the configuration of the network and the
parameters that can be set to the specific requirements of the network. The
following are major configuration factors that have a significant effect on
network performance:
• number of nodes on the network
• addresses of those nodes
• baud rate
The following sections explain network considerations and describe ways to
select parameters for optimum network performance (speed). See your
programming software’s user manual for more information.

Number of Nodes
The number of nodes on the network directly affects the data transfer time
between nodes. Unnecessary nodes (such as a second programming terminal
that is not being used) slow the data transfer rate. The maximum number of
nodes on the network is 32.

Setting Node Addresses
The best network performance occurs when node addresses are assigned in
sequential order. Initiators, such as personal computers, should be assigned
the lowest numbered addresses to minimize the time required to initialize the
network. The valid range for the MicroLogix 1200 controllers is 1 to 31
(controllers cannot be node 0). The default setting is 1. The node address is
stored in the controller Communications Status file (CS0:5/0 to CS0:5/7).

Setting Controller Baud Rate
The best network performance occurs at the highest baud rate, which is 19200.
This is the default baud rate for a MicroLogix 1200 device on the DH-485
network. All devices must be at the same baud rate. This rate is stored in the
controller Communications Status file (CS0:5/8 to CS0:5/15).

Setting Maximum Node Address
Once you have an established network set up and are confident that you will
not be adding more devices, you may enhance performance by adjusting the
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Connect to Networks via RS-232 Interface

E-9

maximum node address of your controllers. It should be set to the highest
node address being used.

IMPORTANT

All devices should be set to the same maximum node
address.

Example DH-485 Connections
The following network diagrams provide examples of how to connect
MicroLogix 1200 controllers to the DH-485 network using the Advanced
Interface Converter (AIC+, catalog number 1761-NET-AIC). For more
information on the AIC+, see the Advanced Interface Converter and
DeviceNet Interface Installation Instructions, Publication 1761-IN002.

DH-485 Network with a MicroLogix 1200 Controller

MicroLogix
1200

connection from port 1 or
port 2 to MicroLogix
1761-CBL-AP00 or
1761-CBL-PM02

1761-CBL-AM00 or
1761-CBL-HM02
(3)

(2)

TERM
A
B
COM
SHLD
CHS GND

TX

TX

TX

PWR

AIC+

DC SOURCE
CABLE

(1) DB-9 RS-232 port

(1)

(2) mini-DIN 8 RS-232 port

+24V dc user supply

EXTERNAL

connection from port 1
or port 2 to PC
1761-CBL-AP00 or
1761-CBL-PM02
AIC+
(3)

(2)

TERM
A
B
COM
SHLD
CHS GND

TX

TX

1747-CP3 or
1761-CBL-AC00

TX

PWR

DC SOURCE
CABLE

(3) RS-485 port

(1)

DH-485

TIP

EXTERNAL

+24V dc user supply

Series C or higher cables are required.

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Connect to Networks via RS-232 Interface

Typical 3-Node Network
PanelView 550

A-B

PanelView

MicroLogix 1200

1761-CBL-AM00
or 1761-CBL-HM02

RJ45 port
AIC+
1761-CBL-AS09
or 1761-CBL-AS03

TERM
A
B
COM
SHLD
CHS GND

TX

TX

TX

PWR

DC SOURCE
CABLE

EXTERNAL

1747-CP3 or 1761-CBL-AC00

This 3-node network is not expandable.

TIP

Networked Operator Interface Device and MicroLogix Controllers
AIC+

AIC+

TERM

TERM

A

B

COM

COM

SHLD

SHLD

CHS GND

TX

A-B

A

B

TX

TX

PWR

TX

DC SOURCE

TX

PWR

DC SOURCE

CABLE

CABLE

EXTERNAL

EXTERNAL

SLC 5/04

PanelView 550

DH-485 Network
AIC+

AIC+

AIC+

TERM

TERM

A

B

TX

PWR

TX

DC SOURCE

TX

PWR

TX

TX

PWR

TX

PWR

CABLE

EXTERNAL

MicroLogix 1200

TX

DC SOURCE

CABLE

EXTERNAL

MicroLogix 1000

CHS GND

TX

DC SOURCE

CABLE

EXTERNAL

SHLD

CHS GND

TX

DC SOURCE

CABLE

COM

SHLD

CHS GND

TX

B

COM

SHLD

CHS GND

A

B

COM

SHLD

TERM

A

B

COM

TX

AIC+

TERM

A

TX

PanelView

CHS GND

TX

EXTERNAL

Personal
Computer

MicroLogix 1500

MicroLogix Remote Packet Support
MicroLogix 1200 controllers can respond and initiate with communications
(or commands) that do not originate on the local DH-485 network. This is
useful in installations where communication is needed between DH-485 and
DH+ networks.
The example below shows how to send messages from a device on the DH+
network to a MicroLogix controller on the DH-485 network. This method
uses an SLC 5/04 processor as the bridge connection.
When using this method (as shown in the illustration below):
• PLC-5 devices can send read and write commands to MicroLogix 1200
controllers.
• MicroLogix 1200 controllers can respond to MSG instructions received.
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Connect to Networks via RS-232 Interface

E-11

• The MicroLogix 1200 controllers can initiate MSG instructions to
devices on the DH+ network.
• PC can send read and write commands to MicroLogix 1200 controllers.
• PC can do remote programming of MicroLogix 1200 controllers.
AIC+

AIC+

TERM
TERM

A

A-B

A

B

B

COM

COM

SHLD

SHLD

CHS GND

PanelView

CHS GND

TX

TX
TX

TX

TX

PWR
TX

PWR

DC SOURCE
DC SOURCE

CABLE

CABLE

EXTERNAL
EXTERNAL

SLC 5/04

PanelView 550

DH-485 Network
AIC+

AIC+

AIC+

AIC+

TERM

TERM

TERM

A

A

A

B

B

B

COM

COM

COM

SHLD

SHLD

SHLD

TERM

CHS GND

CHS GND

CHS GND

A
B
COM

TX

TX

TX

TX

TX

TX

SHLD
CHS GND

TX

TX

PWR

TX

DC SOURCE

PWR

TX

DC SOURCE

CABLE

TX

PWR

DC SOURCE

CABLE

CABLE

TX

PWR

DC SOURCE
EXTERNAL

EXTERNAL

CABLE

EXTERNAL

EXTERNAL

MicroLogix 1000

MicroLogix 1200

MicroLogix 1500

SLC 5/04

DH+ Network

Personal Computer

SLC 5/04

PLC-5

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Connect to Networks via RS-232 Interface

Modbus Communication
Protocol

Modbus is a Half-duplex, master-slave communications protocol. The Modbus
network master reads and writes coils and registers. Modbus protocol allows a
single master to communicate with a maximum of 247 slave devices.
MicroLogix 1200 controllers support Modbus RTU Master and Modbus RTU
Slave protocol.
For more information on configurating your MicroLogix 1200 controller for
Modbus protocol, refer to the MicroLogix 1200 and 1500 Programmable
Controllers Instruction Set Reference Manual, publication 1762-RM001. For
more information about the Modbus protocol, see the Modbus Protocol
Specifications (available from http://www.modbus.org).

ASCII

ASCII provides connection to other ASCII devices, such as bar code readers,
weigh scales, serial printers, and other intelligent devices.
You can use ASCII by configuring the RS-232 port, channel 0 for ASCII driver.
Refer to the MicroLogix 1200 and MicroLogix 1500 Programmable
Controllers Instruction Set Reference Manual, publication 1762-RM001 for
detailed configuration information.

Publication 1762-UM001H-EN-P - June 2015

Appendix

F

System Loading and Heat Dissipation

System Loading Limitations

When you connect MicroLogix accessories and expansion I/O, an electrical
load is placed on the controller power supply. This section shows how to
calculate the load and validate that the system will not exceed the capacity of
the controller power supply.
The following example is provided to illustrate system loading validation. The
system validation procedure accounts for the amount of 5V dc and 24V dc
current consumed by controller, expansion I/O, and user-supplied equipment.
Use the System Loading Worksheet on page F-4 to validate your specific
24-point controller configuration.
Use the System Loading Worksheet on page F-9 to validate your specific
40-point controller.
Current consumed by the processor, memory modules, and the real-time clock
modules has already been factored into the calculations. A system is valid if the
current and power requirements are satisfied.

System Current Loading Example Calculations (24-point
Controller)
Table F.1 Calculating the Current for MicroLogix Accessories
Catalog Number

Device Current Requirements Calculated Current
at 5V dc (mA)

1761-NET-AIC(1) when powered by the base unit communications 0
port, selector switch in the up position
Subtotal 1:

at 24V dc (mA) at 5V dc (mA)

at 24V dc (mA)

120

0

120

0

120

(1) This is an optional accessory. Current is consumed only if the accessory is installed.

1

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F-2

System Loading and Heat Dissipation

Table F.2 Calculating the Current for Expansion I/O
n

A

Number of
Modules

Device Current Requirements
(max)

Calculated Current

at 5V dc (mA)

at 24V dc (mA)

at 5V dc (mA)

at 24V dc (mA)

50

0

100

0

1762-IF4

40

50

1762-IF2OF2

40

105

1762-IQ8

50

0

1762-IQ16

70(2)

0

1762-IQ32T

170

0

1762-IR4

40

50

1762-IT4

40

50

1762-OA8

115

0

1762-OB8

115

0

1762-OB16

175

0

1762-OB32T

175

0

1762-OF4

40

165

1762-OV32T

175

0

80

90

160

180

1762-OW16

140(2)

180(2)

1762-OX6I

110

110

1762-IQ8OW6

110

80
260

180

Catalog Number(1)

1762-IA8

1762-OW8

Total Modules (6 maximum):

2

2

4

B

Subtotal 2:

nxA

nxB

(1) Refer to your expansion I/O Installation Instructions for Current Requirements not listed in this table.
(2) Only applicable to Series B I/O modules.

Validate the System
The example systems shown in the tables below are verified to be acceptable
configurations. The systems are valid because:
• Calculated Current Values < Maximum Allowable Current Values
• Calculated System Loading < Maximum Allowable System Loading

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System Loading and Heat Dissipation

F-3

Table F.3 Validating Systems Using 1762-L24AWA, 1762-L24BXB, 1762-L24AWAR or 1762-L24BXBR
Maximum Allowable Values

Calculated Values

Current:

Current (Subtotal 1 + Subtotal 2 from Table F.1 and Table F.2 on page F-2.):

400 mA at 5V dc

350 mA at 24V dc

System Loading:

0 mA + 260 mA = 260 mA at 5V dc

120 mA + 180 mA = 300 mA at 24V dc

System Loading:
= (260 mA x 5V) + (300 mA x 24 V)
= (1300 mW) + (7200 mW)
= 8500 mW
= 8.50 Watts

10.4 Watts

Table F.4 Validating Systems using 1762-L24BWA or 1762-L24BWAR
Maximum Allowable Values

Calculated Values

Current for Devices Connected to the +24V dc
Sensor Supply:

Sum of all sensor currents

250 mA at 24V dc

140 mA at 24V dc (example sensor value)

Current for MicroLogix Accessories and
Expansion I/O:

Current Values (Subtotal 1 from Table F.1 + Subtotal 2 from Table F.2):

400 mA at 5V dc

0 mA + 260 mA = 260 mA at 5V dc

System Loading:

350 mA at 24V dc

120 mA + 180 mA = 300 mA at 24V dc

System Loading:
= (140 mA x 24 V) + (260 mA x 5 V) + (300 mA x 24 V)
= (3360 mW) + (1300 mW) + (7200 mW)
= 11,860 mW

12 Watts

= 11.9 Watts

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F-4

System Loading and Heat Dissipation

System Loading Worksheet

The tables below are provided for system loading validation for 24-point
Controllers. See System Current Loading Example Calculations (24-point
Controller) on page F-1.

Current Loading
Table F.5 Calculating the Current for MicroLogix Accessories
Catalog Number
1761-NET-AIC(1) when powered by the base unit
communications port, selector switch in the up position

Device Current Requirements

Calculated Current

at 5V dc (mA)

at 24V dc (mA)

at 5V dc (mA)

0

120

at 24V dc (mA)

Subtotal 1:
(1) This is an optional accessory. Current is consumed only if the accessory is installed.

Table F.6 Calculating the Current for Expansion I/O
n

A

Number of
Modules

Device Current Requirements

Calculated Current

at 5V dc (mA)

at 24V dc (mA)

at 5V dc (mA)

1762-IA8

50

0

1762-IF4

40

50

1762-IF2OF2

40

105

1762-IQ8

50

0

1762-IQ16

70(2)

0

1762-IQ32T

170

0

1762-IR4

40

50

1762-IT4

40

50

1762-OA8

115

0

1762-OB8

115

0

1762-OB16

175

0

1762-OB32T

175

0

1762-OF4

40

165

1762-OV32T

175

0

1762-OW8

80

90

1762-OW16

140(2)

180(2)

1762-OX6I

110

110

1762-IQ8OW6

110

80

Total Modules (6 maximum):

Subtotal 2:

Catalog Number(1)

B

(1) Refer to your expansion I/O Installation Instructions for Current Requirements not listed in this table.
(2) Only applicable to Series B I/O modules.

Publication 1762-UM001H-EN-P - June 2015

nxA

nxB
at 24V dc (mA)

System Loading and Heat Dissipation

F-5

Table F.7 Validating Systems using 1762-L24AWA, 1762-L24BXB, 1762-L24AWAR or 1762-L24BXBR
Maximum Allowable Values

Calculated Values

Current:

Current (Subtotal 1 from Table F.5 + Subtotal 2 from Table F.6.):

400 mA at 5V dc

350 mA at 24V dc

System Loading:

mA at 5V dc

mA at 24V dc

System Loading:
= (________ mA x 5V) + (________ mA x 24V)
= __________ mW + __________ mW
= __________ mW
= __________ W

10.4 Watts

Table F.8 Validating Systems using 1762-L24BWA or 1762-L24BWAR
Maximum Allowable Values

Calculated Values

Current for Devices Connected to the +24V dc Sensor
Supply:

Sum of all sensor currents
Include 1761-NET-AIC here rather than in Table F.5, if it is powered externally by
the sensor supply

250 mA at 24V dc

mA at 24V dc

Current for MicroLogix Accessories and Expansion I/O: Current (Subtotal 1 from Table F.5 + Subtotal 2 from Table F.6.)
400 mA at 5V dc
System Loading:

350 mA at 24V dc

mA at 5V dc

mA at 24V dc

System Loading:
= (________ mA x 24 V) + (________ mA x 5V) + (________ mA x 24 V)
= __________ mW + __________ mW + __________ mW
= __________ mW

12 Watts

= __________ W

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F-6

System Loading and Heat Dissipation

System Current Loading Example Calculations (40-point
Controller)
Table F.9 Calculating the Current for MicroLogix Accessories
Catalog Number

1761-NET-AIC(1) when powered by the base unit
communications port, selector switch in the up position

Device Current Requirements

Calculated Current

at 5V dc (mA)

at 24V dc (mA)

at 5V dc
(mA)

at 24V dc
(mA)

0

120

0

120

0

120

Subtotal 1:
(1) This is an optional accessory. Current is consumed only if the accessory is installed.

Table F.10 Calculating the Current for Expansion I/O
n

A

Number of
Modules

Device Current Requirements (max)

Calculated Current

at 5V dc (mA)

at 24V dc (mA)

at 5V dc (mA)

at 24V dc (mA)

1762-IA8

50

0

1762-IF4

40

50

40

105

40

105

50

0

70(2)

0

140(2)

0

1762-IQ32T

170

0

1762-IR4

40

50

1762-IT4

40

50

115

0

115

0

1762-OB8

115

0

1762-OB16

175

0

1762-OB32T

175

0

1762-OF4

40

165

1762-OV32T

175

0

1762-OW8

80

90

140(2)

180(2)

140(2)

180(2)

1762-OX6I

110

110

1762-IQ8OW6

110

80
435

285

Catalog Number(1)

1762-IF2OF2

1

1762-IQ8
1762-IQ16

1762-OA8

1762-OW16

Total Modules (6 maximum):

2

1

1

6

B

Subtotal 2:

(1) Refer to your expansion I/O Installation Instructions for Current Requirements not listed in this table.
(2) Only applicable to Series B I/O modules.

Publication 1762-UM001H-EN-P - June 2015

nxA

nxB

System Loading and Heat Dissipation

F-7

Validate the System
The example systems shown in Table F.11 and Table F.12 are verified to be
acceptable configurations. The systems are valid because:
• Calculated Current Values < Maximum Allowable Current Values
• Calculated System Loading < Maximum Allowable System Loading
Table F.11 Validating Systems using 1762-L40AWA, 1762-L40BXB, 1762-L40AWAR or 1762-L40BXBR
Maximum Allowable Values

Calculated Values

Current:

Current (Subtotal 1 from Table F.9 + Subtotal 2 from Table F.10):

600 mA at 5V dc

500 mA at 24V dc

0 mA + 435 mA = 435 mA at 5V dc

System Loading:

System Loading:

15 Watts

= (4.5 mA x 5V) + (405 mA x 24V)
= (2175 mW) + (9720 mW)
= 11,895 mW
= 11.90 Watts

120 mA + 285 mA = 405 mA at 24V dc

Table F.12 Validating Systems using 1762-L40BWA or 1762-L40BWAR
Maximum Allowable Values

Calculated Values

Current for Devices Connected to the +24V dc
Sensor Supply:

Sum of all current sensors

400 mA at 24V dc

150 mA at 24V dc (example sensor value)

Current for MicroLogix Accessories and
Expansion I/O:

Current (Subtotal 1 from Table F.9 + Subtotal 2 from Table F.10):

600 mA at 5V dc

0 mA + 435 mA = 435 mA at 5V dc

System Loading:

500 mA at 24V dc

120 mA + 285 mA = 405 mA at 24V dc

System Loading:
= (150 mA x 24V) + (435 mA x 5V) + (405 mA x 24V)
= (3600 mW) + (2175 mW) + (9720 mW)
= 15,495 W

16 Watts

= 15.50 Watts

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F-8

System Loading and Heat Dissipation

System Loading Worksheet

The tables below are provided for system loading validation for 40-point
Controllers. See System Current Loading Example Calculations (40-point
Controller) on page F-6.

Current Loading
Table F.13 Calculating the Current for MicroLogix Accessories
Catalog Number
1761-NET-AIC(1) when powered by the base unit

Device Current Requirements

Calculated Current

at 5V dc (mA)

at 24V dc (mA)

at 5V dc (mA)

0

120

at 24V dc (mA)

communications port, selector switch in the up position
Subtotal 1:
(1) This is an optional accessory. Current is consumed only if the accessory is installed.

Table F.14 Calculating the Current for Expansion I/O
n

A

Number of
Modules

Device Current Requirements

Calculated Current

at 5V dc (mA)

at 24V dc (mA)

at 5V dc (mA)

1762-IA8

50

0

1762-IQ8

50

0

1762-IF4

40

50

1762-IF2OF2

40

105

1762-IQ16

70(2)

0

1762-IQ32T

170

0

1762-IR4

40

50

1762-IT4

40

50

1762-OA8

115

0

1762-OB8

115

0

1762-OB16

175

0

1762-OB32T

175

0

1762-OF4

40

165

1762-OV32T

175

0

1762-OW8

80

90

1762-OW16

140(2)

180(2)

Catalog Number(1)

Publication 1762-UM001H-EN-P - June 2015

B

nxA

nxB
at 24V dc (mA)

System Loading and Heat Dissipation

F-9

Table F.14 Calculating the Current for Expansion I/O
1762-OX6I

110

110

1762-IQ8OW6

110

80

Total Modules (6 maximum):

Subtotal 2:

(1) Refer to your expansion I/O Installation Instructions for Current Requirements not listed in this table.
(2) Only applicable to Series B I/O modules.

Table F.15 Validating Systems using 1762-L40AWA, 1762-L40BXB, 1762-L40AWAR or 1762-L40BXBR
Maximum Allowable Values

Calculated Values

Current:

Current (Subtotal 1 from Table F.13 + Subtotal 2 from Table F.14.):

600 mA at 5V dc

500 mA at 24V dc

System Loading:

System Loading:
= (________ mA x 5V) + (________ mA x 24V)
= __________ mW + __________ mW
= __________ mW
= __________ W

15 Watts

Table F.16 Validating Systems using 1762-L40BWA or 1762-L40BWAR
Maximum Allowable Values

Calculated Values

Current for Devices Connected to the +24V dc Sensor
Supply:

Sum of all sensor currents
Include 1761-NET-AIC here rather than in Table F.13, if it is powered externally by
the sensor supply

400 mA at 24V dc

mA at 24V dc

Current for MicroLogix Accessories and Expansion I/O: Current (Subtotal 1 from Table F.13 + Subtotal 2 from page Table F.14.):
600 mA at 5V dc
System Loading:

500 mA at 24V dc

mA at 5 V dc

mA at 24V dc

System Loading:
= (________ mA x 24V) + (________ mA x 5V) + (________ mA x 24V)
= __________ mW + __________ mW + __________ mW
= __________ mW

16 Watts

= __________ W

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F-10

System Loading and Heat Dissipation

Use the following table when you need to determine the heat dissipation of
your system for installation in an enclosure. For System Loading, take the value
from the appropriate system loading worksheets on pages F-4, F-5, F-8 or F-9:

Calculating Heat
Dissipation
Table F.17 Heat Dissipation
Catalog Number

Heat Dissipation
Equation or Constant

Calculation

1762-L24AWA, -L24AWAR

15.2W + (0.4 x System Loading)

15.2W + (0.4 x ______ W)

W

1762-L24BWA, -L24BWAR

15.7W + (0.4 x System Loading)

15.7W + (0.4 x ______ W)

W

1762-L24BXB, -L24BXBR

17.0W + (0.3 x System Loading)

17.0W + (0.3 x ______ W)

W

1762-L40AWA, -L40AWAR

21.0W + (0.4 x System Loading)

21.0W + (0.4 x ______ W)

W

1762-L40BWA, -L40BWAR

22.0W + (0.4 x System Loading)

22.0W + (0.4 x ______ W)

W

1762-L40BXB, -L40BXBR

27.9W + (0.3 x System Loading)

27.9W + (0.3 x ______ W)

W

1762-IA8

2.0W x number of modules

2.0W x _________

W

1762-IF4

2.0W x number of modules

2.0W x _________

W

1762-IF2OF2

2.6W x number of modules

2.6W x _________

W

1762-IQ8

3.7W x number of modules

3.7W x _________

W

1762-IQ16

5.1W(1) x number of modules

5.1W(1) x _________

W

1762-IQ32T

6.8 W x number of modules (at 30.0V dc) 6.8 W x _________ (at 30.0V dc)
5.4 W x number of modules (at 26.4V dc) 5.4 W x _________ (at 26.4V dc)

W
W

1762-IR4

1.5W x number of modules

1.5W x _________

W

1762-IT4

1.5W x number of modules

1.5W x _________

W

1762-OA8

2.9W x number of modules

2.9W x _________

W

1762-OB8

1.6W x number of modules

1.6W x _________

W

1762-OB16

2.9W x number of modules

2.9W x _________

W

1762-OB32T

3.4 W x number of modules

3.4 W x _________

W

1762-OF4

2.8W x number of modules

2.8W x _________

W

1762-OV32T

2.7 W x number of modules

2.7 W x _________

W

1762-OW8

2.9W x number of modules

2.9W x _________

W

1762-OW16

6.1(1)W x number of modules

6.1W(1) x _________

W

1762-OX6I

2.8W x number of modules

2.8W x _________

W

1762-IQ8OW6

5.0W x number of modules (at 30V dc)
5.0W x _________
4.4W x number of modules (at 26.4V dc) 4.4W x _________

W
W

Add Sub-totals to determine Heat Dissipation
(1) Only applicable to Series B I/O modules.

Publication 1762-UM001H-EN-P - June 2015

Sub-Total

W

Glossary
The following terms are used throughout this manual. Refer to the
Allen-Bradley Industrial Automation Glossary, Publication Number AG-7.1,
for a complete guide to Allen-Bradley technical terms.
address
A character string that uniquely identifies a memory location. For example,
I:1/0 is the memory address for the data located in the Input file location
word1, bit 0.
AIC+ Advanced Interface Converter
A device that provides a communication link between various networked
devices. (Catalog Number 1761-NET-AIC.)
application
1) A machine or process monitored and controlled by a controller.
2) The use of computer- or processor-based routines for specific purposes.
baud rate
The speed of communication between devices. All devices must communicate
at the same baud rate on a network.
bit
The smallest storage location in memory that contains either a 1 (ON) or a 0
(OFF).
block diagrams
A schematic drawing.
Boolean operators
Logical operators such as AND, OR, NAND, NOR, NOT, and Exclusive-OR
that can be used singularly or in combination to form logic statements or
circuits. Can have an output response of T or F.
branch
A parallel logic path within a rung of a ladder program.
communication scan
A part of the controller’s operating cycle. Communication with other devices,
such as software running on a personal computer, takes place.

1

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Glossary

2

controller
A device, such as a programmable controller, used to monitor input devices
and control output devices.
controller overhead
An internal portion of the operating cycle used for housekeeping and set-up
purposes.
control profile
The means by which a controller determines which outputs turn on under
what conditions.
counter
1) An electro-mechanical relay-type device that counts the occurrence of some
event. May be pulses developed from operations such as switch closures or
interruptions of light beams.
2) In controllers, a software counter eliminates the need for hardware counters.
The software counter can be given a preset count value to count up or down
whenever the counted event occurs.
CPU (Central Processing Unit)
The decision-making and data storage section of a programmable controller.
data table
The part of processor memory that contains I/O values and files where data is
monitored, manipulated, and changed for control purposes.
DIN rail
Manufactured according to Deutsche Industrie Normenausshus (DIN)
standards, a metal railing designed to ease installation and mounting of your
controller.
download
Data is transferred from a programming or storage device to another device.
DTE (Data Terminal Equipment)
Equipment that is attached to a network to send or receive data, or both.
embedded I/O
Embedded I/O is the controller’s on-board I/O.
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3

EMI
Electromagnetic interference.
encoder
1) A rotary device that transmits position information.
2) A device that transmits a fixed number of pulses for each revolution.
executing mode
Any run or test mode.
expansion I/O
Expansion I/O is I/O that is connected to the controller via a bus or cable.
MicroLogix 1200 controllers use Bulletin 1762 expansion I/O.
false
The status of an instruction that does not provide a continuous logical path on
a ladder rung.
FIFO (First-In-First-Out)
The order that data is entered into and retrieved from a file.
file
A collection of information organized into one group.
full-duplex
A bidirectional mode of communication where data may be transmitted and
received simultaneously (contrast with half-duplex).
half-duplex
A communication link in which data transmission is limited to one direction at
a time.
hard disk
A storage area in a personal computer that may be used to save processor files
and reports for future use.
high byte
Bits 8 to 15 of a word.

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Glossary

4

input device
A device, such as a push button or a switch, that supplies signals to the input
circuits of the controller.
inrush current
The temporary surge current produced when a device or circuit is initially
energized.
instruction
A mnemonic and data address defining an operation to be performed by the
processor. A rung in a program consists of a set of input and output
instructions. The input instructions are evaluated by the controller as being
true or false. In turn, the controller sets the output instructions to true or false.
instruction set
The set of general purpose instructions available with a given controller.
I/O (Inputs and Outputs)
Consists of input and output devices that provide and/or receive data from the
controller.
jump
Change in normal sequence of program execution, by executing an instruction
that alters the program counter (sometimes called a branch). In ladder
programs a JUMP (JMP) instruction causes execution to jump to a labeled
rung.
ladder logic
A program written in a format resembling a ladder-like diagram. The program
is used by a programmable controller to control devices.
least significant bit (LSB)
The digit (or bit) in a binary word (code) that carries the smallest value of
weight.
LED (Light Emitting Diode)
Used as status indicator for processor functions and inputs and outputs.
LIFO (Last-In-First-Out)
The order that data is entered into and retrieved from a file.
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Glossary

5

low byte
Bits 0 to 7 of a word.
logic
A process of solving complex problems through the repeated use of simple
functions that can be either true or false. General term for digital circuits and
programmed instructions to perform required decision making and
computational functions.
Master Control Relay (MCR)
A mandatory hard-wired relay that can be de-energized by any
series-connected emergency stop switch. Whenever the MCR is de-energized,
its contacts open to de-energize all application I/O devices.
mnemonic
A simple and easy to remember term that is used to represent a complex or
lengthy set of information.
modem
Modulator/demodulator. Equipment that connects data terminal equipment
to a communication line.
modes
Selected methods of operation. Example: run, test, or program.
negative logic
The use of binary logic in such a way that “0” represents the voltage level
normally associated with logic 1 (for example, 0 = +5V, 1 = 0V). Positive is
more conventional (for example, 1 = +5V, 0 = 0V).
network
A series of stations (nodes) connected by some type of communication
medium. A network may be made up of a single link or multiple links.
nominal input current
The current at nominal input voltage.
normally closed
Contacts on a relay or switch that are closed when the relay is de-energized or
the switch is deactivated; they are open when the relay is energized or the
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Glossary

6

switch is activated. In ladder programming, a symbol that allows logic
continuity (flow) if the referenced input is logic “0” when evaluated.
normally open
Contacts on a relay or switch that are open when the relay is de-energized or
the switch is deactivated. (They are closed when the relay is energized or the
switch is activated.) In ladder programming, a symbol that allows logic
continuity (flow) if the referenced input is logic “1” when evaluated.
off-delay time
The OFF delay time is a measure of the time required for the controller logic
to recognize that a signal has been removed from the input terminal of the
controller. The time is determined by circuit component delays and by any
filter adjustment applied.
offline
Describes devices not under direct communication.
offset
The steady-state deviation of a controlled variable from a fixed point.
off-state leakage current
When an ideal mechanical switch is opened (off-state) no current flows
through the switch. Practical semiconductor switches, and the transient
suppression components which are sometimes used to protect switches, allow
a small current to flow when the switch is in the off state. This current is
referred to as the off-state leakage current. To ensure reliable operation, the
off-state leakage current rating of a switch should be less than the minimum
operating current rating of the load that is connected to the switch.
on-delay time
The ON delay time is a measure of the time required for the controller logic to
recognize that a signal has been presented at the input terminal of the
controller.
one-shot
A programming technique that sets a bit for only one program scan.
online
Describes devices under direct communication. For example, when RSLogix
500 is monitoring the program file in a controller.

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7

operating voltage
For inputs, the voltage range needed for the input to be in the On state. For
outputs, the allowable range of user-supplied voltage.
output device
A device, such as a pilot light or a motor starter coil, that is controlled by the
controller.
processor
A Central Processing Unit. (See CPU.)
processor file
The set of program and data files used by the controller to control output
devices. Only one processor file may be stored in the controller at a time.
program file
The area within a processor file that contains the ladder logic program.
program mode
When the controller is not executing the processor file and all outputs are
de-energized.
program scan
A part of the controller’s operating cycle. During the scan the ladder program
is executed and the output data file is updated based on the program and the
input data file.
programming device
Executable programming package used to develop ladder diagrams.
protocol
The packaging of information that is transmitted across a network.
read
To acquire data from a storage place. For example, the processor READs
information from the input data file to solve the ladder program.
relay
An electrically operated device that mechanically switches electrical circuits.
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8

relay logic
A representation of the program or other logic in a form normally used for
relays.
restore
To download (transfer) a program from a personal computer to a controller.
reserved bit
A status file location that the user should not read or write to.
retentive data
Information associated with data files (timers, counters, inputs, and outputs) in
a program that is preserved through power cycles.
RS-232
An EIA standard that specifies electrical, mechanical, and functional
characteristics for serial binary communication circuits. A single-ended serial
communication interface.
run mode
This is an executing mode during which the controller scans or executes the
ladder program, monitors input devices, energizes output devices, and acts on
enabled I/O forces.
rung
Ladder logic is comprised of a set of rungs. A rung contains input and output
instructions. During Run mode, the inputs on a rung are evaluated to be true
or false. If a path of true logic exists, the outputs are made true. If all paths are
false, the outputs are made false.
save
To upload (transfer) a program stored in memory from a controller to a
personal computer; OR to save a program to a computer hard disk.
scan time
The time required for the controller to execute the instructions in the
program. The scan time may vary depending on the instructions and each
instruction’s status during the scan.

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9

sinking
A term used to describe current flow between an I/O device and controller
I/O circuit — typically, a sinking device or circuit provides a path to ground,
low, or negative side of power supply.
sourcing
A term used to describe current flow between an I/O device and controller
I/O circuit — typically, a sourcing device or circuit provides a path to the
source, high, or positive side of power supply.
status
The condition of a circuit or system, represented as logic 0 (OFF) or 1 (ON).
terminal
A point on an I/O module that external I/O devices, such as a push button or
pilot light, are wired to.
throughput
The time between when an input turns on and the corresponding output turns
on.
true
The status of an instruction that provides a continuous logical path on a ladder
rung.
upload
Data is transferred to a programming or storage device from another device.
watchdog timer
A timer that monitors a cyclical process and is cleared at the conclusion of
each cycle. If the watchdog runs past its programmed time period, it causes a
fault.
workspace
The main storage available for programs and data and allocated for working
storage.
write
To copy data to a storage device. For example, the processor WRITEs the
information from the output data file to the output modules.
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10

Notes:

Publication 1762-UM001H-EN-P - June 2015

Index
Numerics
1762-24AWA wiring diagram 3-12
1762-40BWA sourcing wiring diagram

3-15

1762-IA8 wiring diagram 3-18
1762-IF2OF2
input type selection 3-26
output type selection 3-26
terminal block layout 3-27
wiring 3-27
1762-IF4
input type selection 3-28
terminal block layout 3-29
1762-IQ16 wiring diagram 3-19
1762-IQ32T wiring diagram 3-20
1762-IQ8 wiring diagram 3-18
1762-IQ80W6 wiring diagram 3-25
1762-OA8 wiring diagram 3-20
1762-OB16 wiring diagram 3-21
1762-OB32T wiring diagram 3-22
1762-OB8 wiring diagram 3-21
1762-OV32T wiring diagram 3-22
1762-OW16 wiring diagram 3-23
1762-OW8 wiring diagram 3-23
1762-OX6I wiring diagram 3-24

A
address G-1
Advanced Interface Converter. See AIC+
agency certifications 2-1
AIC+
apply power to 4-17
attach to the network 4-17
connect 4-12
connecting
isolated modem 4-6
definition G-1
install 4-17
modem connections 4-6
recommended user supplied components

4-15

safety consideration 4-17
select cable 4-14
analog expansion I/O C-4
diagnostics C-4
module operation vs. channel operation

C-4

power-up diagnostics C-4
system wiring guidelines 3-25
troubleshooting C-4
application G-1

B
battery 6-2
baud rate G-1
bit G-1
block diagrams G-1
Boolean operators G-1
branch G-1

C
cables
planning routes for DH485 connections

E-7

selection guide for the AIC+ 4-14
call for assistance C-8
CE mark 2-2
common mode rejection ratio
specification A-19
common techniques used in this manual

P-2

communication connections 4-1
communication options 1-4
communication protocols
DF1 Full-duplex E-1
DF1 Half-duplex E-2
DH485 E-5
Modbus E-12
communication scan G-1
communications toggle push button
use 4-3
component descriptions 1-2
1762 expansion I/O 1-3
communication cables 1-4
memory module 1-2
real-time clock 1-2
configuration errors C-6
connect expansion I/O 2-19
connect the system
AIC+ 4-12, 4-17
DF1 Full-Duplex protocol 4-4
DF1 isolated point-to-point connection

4-5

DH485 network 4-9
connect to DF1 Half-Duplex network 4-8
contactors (bulletin 100), surge
suppressors for 3-5
control profile G-2
ControlFlash
missing/corrupt OS LED pattern D-2
sequence of operation D-2
use D-1

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2

Index

controller G-2
ground 3-6
I/O wiring 3-17
installation 2-1
LED status C-1
LED status error conditions C-2
LED status normal operation C-2
minimize electrical noise 3-17
mount 2-14
mount on DIN rail 2-15
mount on panel 2-16
mounting dimensions 2-13
prevent excessive heat 2-7
controller overhead G-2
controller spacing 2-13
counter G-2
CPU (Central Processing Unit) G-2

D
data table G-2
default communication configuration

4-2
DF1 Full-Duplex protocol
connect 4-4, 4-5
DF1 Full-duplex protocol
description E-1
example system configuration E-2
use a modem 4-5
using a modem E-3
DF1 Half-Duplex protocol
description E-2
DH485 network
configuration parameters E-8
connect 4-9
devices that use the network E-5
example system configuration E-9
installation 4-9
planning considerations E-6
DIN rail G-2
disconnect main power 2-5
download G-2
DTE (Data Terminal Equipment) G-2

E
Electronics Industries Association (EIA)

E-1

EMC Directive 2-2
EMI G-3

Publication 1762-UM001H-EN-P - June 2015

encoder G-3
error recovery model C-3
errors
configuration C-6
critical C-5
extended error information field C-6
hardware C-6
module error field C-6
non-critical C-5
European Union Directive compliance

2-2

EMC Directive 2-2
low voltage directive 2-2
executing mode G-3
expansion I/O
1762-IF2OF2 input type selection 3-26
1762-IF2OF2 output type selection 3-26
expansion I/O mount 2-18
expansion I/O wiring 3-18
1762-IA8 wiring diagram 3-18
1762-IF2OF2 wiring 3-27
1762-IF4 terminal block layout 3-29
1762-IQ16 wiring diagram 3-19
1762-IQ32T wiring diagram 3-20
1762-IQ8 wiring diagram 3-18
1762-IQ80W6 wiring diagram 3-25
1762-OA8 wiring diagram 3-20
1762-OB16 wiring diagram 3-21
1762-OB32T wiring diagram 3-22
1762-OB8 wiring diagram 3-21
1762-OV32T wiring diagram 3-22
1762-OW16 wiring diagram 3-23
1762-OW8 wiring diagram 3-23
1762-OX6I wiring diagram 3-24
analog wiring guidelines 3-25
extended error information field C-6

F
false G-3
FIFO (First-In-First-Out) G-3
file G-3
Full-duplex 4-5
full-duplex G-3

G
general considerations 2-2
ground the controller 3-6

Index

H
Half-duplex 4-8, G-3
hard disk G-3
hardware errors C-6
hardware features 1-1
heat dissipation
calculating F-10
heat protection 2-7
high byte G-3

I
I/O (Inputs and Outputs) G-4
input device G-4
input states on power down 2-7
inrush current G-4
install
ControlFlash software D-1
memory module 2-12
your controller 2-1
install real-time clock 2-12
instruction G-4
instruction set G-4
isolated link coupler
install 4-10
isolation transformers
power considerations 2-6

J
jump G-4

L
ladder logic G-4
least significant bit (LSB) G-4
LED (Light Emitting Diode) G-4
LIFO (Last-In-First-Out) G-4
logic G-5
low byte G-5

M
manuals
related P-2
master control relay 2-8
emergency-stop switches 2-9

3

using ANSI/CSA symbols schematic

2-11

using IEC symbols schematic 2-10
Master Control Relay (MCR) G-5
master control relay circuit
periodic tests 2-6
memory module
data file protection 6-4
operation 6-3
program compare 6-4
program/data backup 6-3
removal/installation under power 6-4
write protection 6-4
minimize electrical noise 3-17
mnemonic G-5
Modbus communication protocol E-12
modem G-5
modem cable
construct your own 4-7
modems
use with MicroLogix controllers E-3
modes G-5
module error field C-6
motor starters (bulletin 509)
surge suppressors 3-5
motor starters (bulletin 709)
surge suppressors 3-5
mount expansion I/O 2-17
mount on DIN rail 2-17

N
negative logic G-5
network G-5
nominal input current G-5
normally closed G-5
normally open G-6
null modem cable 4-7

O
offline G-6
offset G-6
off-state leakage current G-6
one-shot G-6
online G-6
operating voltage G-7
output device G-7

Publication 1762-UM001H-EN-P - June 2015

4

Index

P
planning considerations for a network

run mode G-8
rung G-8

E-6
power considerations
input states on power down 2-7
isolation transformers 2-6
loss of power source 2-7
other line conditions 2-7
overview 2-6
power supply inrush 2-6
power distribution 2-5
power source
loss of 2-7
power supply inrush
power considerations 2-6
prepare for upgrade D-1
prevent excessive heat 2-7
processor G-7
processor file G-7
program 1-4
program file G-7
program mode G-7
program scan G-7
programming device G-7
protocol G-7
publications
related P-2
purpose of this manual P-1

R
read G-7
real-time clock
battery operation 6-2
disable 6-2
operation 6-1
removal/installation under power 6-1
write data 6-2
related documentation P-2
related publications P-2
relay G-7
relay logic G-8
relays
surge suppressors for 3-5
remote packet support E-10
replacement parts B-1
reserved bit G-8
restore G-8
retentive data G-8
RS-232 G-8
RS-232 communication interface E-1
Publication 1762-UM001H-EN-P - June 2015

S
safety circuits 2-5
safety considerations 2-3
disconnect main power 2-5
hazardous location 2-3
master control relay circuit
periodic tests 2-6
periodic tests of master control relay
circuit 2-6
power distribution 2-5
safety circuits 2-5
save G-8
scan time G-8
sinking G-9
sinking and sourcing wiring diagrams

3-12
sinking wiring diagram
1762-24BWA 3-13
sourcing G-9
sourcing wiring diagram
1762-24BWA 3-13
specifications A-1
status G-9
surge suppressors
for contactor 3-5
for motor starters 3-5
for relays 3-5
recommended 3-5
use 3-3
system configuration
DF1 Full-duplex examples E-2
DH485 connection examples E-9
system loading
example calculations F-1
limitations F-1
worksheet F-4
system loading and heat dissipation F-1

T
terminal G-9
terminal block layouts
1762-IF2OF2 3-27
1762-IF4 3-29
controllers 3-7
terminal groupings 3-9
terminal groupings 3-9
throughput G-9

Index

Trim Pot Information Function File 5-2
trim pot operation 5-1
trim pots 5-1
adjustment 5-1
error conditions 5-2
location 5-1
troubleshoot your system C-1
true G-9

U
upload G-9
use communications toggle push button

4-3

use emergency-stop switches 2-9
use memory modules 6-1
use real-time clock 6-1
use trim pots 5-1

W
wire your controller 3-1
wiring diagram
1762-IA8 3-18
1762-IF2OF2 differential sensor 3-27
1762-IF2OF2 single-ended sensor 3-28
1762-IQ16 3-19
1762-IQ32T 3-20
1762-IQ8 3-18

5

1762-IQ80W6 3-25
1762-L24AWA input 3-12
1762-L24AWA output 3-14
1762-L24BWA output 3-14
1762-L24BWA sinking 3-13
1762-L24BWA sourcing 3-13
1762-L24BXB output 3-15
1762-L24BXB sinking 3-14
1762-L24BXB sourcing 3-14
1762-L40AWA input 3-15
1762-L40AWA output 3-17
1762-L40BWA output 3-17
1762-L40BWA sourcing 3-16
1762-L40BXB output 3-17
1762-L40BXB sinking 3-16
1762-L40BXB sourcing 3-16
1762-OA8 3-20
1762-OB16 3-21
1762-OB32T 3-22
1762-OB8 3-21
1762-OV32T 3-22
1762-OW16 3-23
1762-OW8 3-23
1762-OX6I 3-24
terminal block layouts 3-7, 3-27, 3-29
wiring diagrams 3-7
workspace G-9
write G-9

Publication 1762-UM001H-EN-P - June 2015

6

Index

Notes:

Publication 1762-UM001H-EN-P - June 2015

Rockwell Automation Support
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Publication 1762-UM001H-EN-P - June 2015 8
Supersedes Publication 1762-UM001G-EN-P - March 2011

Copyright © 2015 Rockwell Automation, Inc. All rights reserved. Printed in the U.S.A.



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