SignalFire Telemetry SENTINEL Sentinel Node User Manual Manual
SignalFire Telemetry, Inc. Sentinel Node Manual
Manual
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SignalFire Telemetry Rev 1.2
Sentinel Node HART Interface Manual
SignalFire Model: SENTINEL-HART
The SignalFire Sentinel Node is an Intrinsically Safe device with the following features:
• Powers a single HART sensor at 12.5VDC or 18.7VDC (software selectable)
• Low power operation from an intrinsically safe high capacity lithium primary
battery pack.
• Optional solar battery system for routing nodes, high power draw sensors, or rapid
data collection
• Sends data to a SignalFire Buffered Modbus Gateway
• Settable (DIP switch) Modbus ID
Sentinel Node with cover removed
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SignalFire Telemetry Rev 1.2
Specifications
Enclosure Size: 3.5” tall x 5.0” wide x 5.0” deep
Power Source: Internal IS Lithium battery pack. SignalFire Part Number:
810-0008-02
External Solar battery system. SignalFire Part Number:
SENTINEL-SOLAR
Other external power supply meeting the power entity parameters
from the control drawing.
Temperature Range: -40ºC to +60 ºC
Radio Frequency: 902-928MHz ISM Band, FHSS radio, internal antenna
Compliance: Certified for use in Class I, Division 1 groups C and D. EXi [EXi]
FCC/IC Certified.
WARNING: Use of this equipment in a manner not specified
by the manufacturer may impair the protection provided by the
equipment.
WARING: The use of any parts not supplied by the
manufacturer violates the safety rating of the equipment
The associated apparatus provides intrinsically safe outputs
L'appareil associé fournit des sorties à sécurité intrinsèque
Refer to control drawing 960-0026-01 for requirements when used in a
Class I Division 1 area.
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SignalFire Telemetry Rev 1.2
The picture below shows the connection and major components of the Sentinel Node.
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SignalFire Telemetry Rev 1.2
Radio LEDs:
• The radio TX LED (Green) flashes each time a radio packet is sent. This LED
will blink rapidly while searching for the radio network.
• The Radio RX LED (red) blinks on each received radio packet.
Status LEDs:
• The Active LED (green) will blink at boot up and will blink rapidly when the
sensor is being powered.
• The HART_STATUS LED will blink once to indicate a HART sensor is
connected after a HART scan is completed. A HART scan is conducted at each
power-up or when the Scan/Checkin button is pressed.
• The ERROR LED (Red) will blink to indicate an error condition, such as the
Slave ID being set to 0 which is invalid.
Scan/Checkin Button:
•
If this button is pressed the Sentinel will apply power to the sensor for the
configured sensor on time and scan for the HART sensor. If the HART
sensor is detected the HART_STATUS LED will blink once and its data
will be read. The Sentinel will also send the collected sensor data to the
gateway.
Section 1: Setup
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SignalFire Telemetry Rev 1.2
WARING: Perform the steps in section 1 setup in a safe
location only.
The nodes need to be set up for correct operation before being fielded. The configurable
items include:
• Network Selection
• Check-in Period Selection
• Modbus Slave ID Setting
• Sensor on time/supply voltage
The Modbus slave ID is set using the DIP switch, all other setting are made using the
SFToolKit PC application and a serial programming cable.
Network Setting
The network address can be used to create separate networks using multiple gateways
(that are in close proximity with one another). The network is set using SFToolKit. The
Network Group setting is used when more than 8 networks are needed. Both the network
and network group must match for nodes to communicate.
Modbus Slave ID
The Modbus Slave ID is set using the DIP switch. The DIP switch takes an 8-bit binary
input which is converted into a slave ID from 1 to 255. In the picture below switch 1 and
2 are on which is 00000011 and results in a slave ID of 3. The least significant bit (LSB)
is on the left and is labeled 1 under the row of switches.
Sensor Settings
The Sentinel Node will supply either 18 Volts or 12 Volts to the sensor, this is selectable
in the SFToolKit application. Also the sensor warm-up time must be configured. The
default is 2 seconds which is used for most pressure and other simple sensors. Radar
sensors often require a longer warm-up time. Contact your sensor manufacturer or
SignalFire for details.
Selecting a sensor voltage of 12V will result in longer battery life; however some
sensors require higher voltage.
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SignalFire Telemetry Rev 1.2
Section 2: Sensor Connections
Wiring Requirements
To ensure intrinsic safety is maintained it is required that the installer follow these
guidelines when connecting sensors to the SignalFire node. See pictures for proper wire
routing examples.
• Sensor wires entering the enclosure must be run as pictured
• The battery wire much be routed through the battery cable hold-down clamp.
• Strip the wires so that there is a minimum exposed un-insulated wire when
inserted into the screw terminals.
• All wiring should be neat and orderly.
Battery cable routing
Sensor Cable Routing
Battery
cable must
run through
clamp
Sensor cable should
be routed as shown
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SignalFire Telemetry Rev 1.2
HART Sensor Connection
A single sensor operating in HART multi-drop mode may be connected to the Sentinel
node. The HART sensor must be configured for HART ID 1.
HART Sensor Connection
The HART sensor is a 2-Wire interface between the Sentinel Node and the HART sensor.
The positive (HART+) at the sensor is connected to the top terminal on the Sentinel
Node. The negative terminal (HART-) is connected to the bottom terminal of the
Sentinel Node, the middle terminal should be left unconnected.
HART +
HART -
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SignalFire Telemetry
Section 3: Remote Modbus Register Mapping
The Sentinel Node sends data to a SignalFire Telemetry Modbus gateway. The data that
is sent to the gateway is available at the gateway in registers where it can then be read by
a Modbus RTU. Consequently, the node needs to have a unique (to the network it is in)
Modbus slave ID which the gateway will use to store its unique data. The ID is set via
the DIP switch on the board.
Modbus Registers
Every check-in period, the sensors are read and data is sent to the gateway. The gateway
will save the data under the set Modbus ID in 16-bit registers. The register map for this
system is:
Register Map
Register
Number
Register
Address
(Offset)
Description
44001 4000 HART ID 1: Manufacturer’s ID Code/Device Type (ID=MSB, Device=LSB)
44002 4001 HART ID 1: Device ID Number (ID high bite = MSB, ID mid byte = LSB)
44003 4002 HART ID 1: Device ID Number, HART Status (ID low byte = MSB, Status = LSB)
44004 4003 HART ID 1: PV & SV Units Code (PV=MSB, SV=LSB)
44005 4004 HART ID 1: TV & QV Units Code (TV=MSB, QV=LSB)
44006-44007 4005-4006 HART ID 1: Primary Variable (PV) (two registers) (float)
44008-44009 4007-4008 HART ID 1: Secondary Variable (SV) (two registers) (float)
44010-44011 4009-4010 HART ID 1: Tertiary Variable (TV) (two registers) (float)
44012-44013 4011-4012 HART ID 1: Quaternary Variable (QV) (two registers) (float)
49988 9987 or 65524 Major revision number for the mainboard
49989 9988 or 65525 Minor revision number for the mainboard
49990 9989 or 65526 Major revision number for the radio
49991 9990 or 65527 Minor revision number for the radio
49992 9991 or 65528 High 16 bits of SFTS node address
49993 9992 or 65529 Low 16 bits of SFTS node address (the radio ID)
49994 9993 or 65530 Slave ID readback
49995 9994 or 65531 Received signal strength of last packet from the slave
49996 9995 or 65532 Battery voltage of the Modbus client, in millivolts
49997 9996 or 65533 Minutes until this slave will time out, unless new data is received
49998 9997 or 65534 Number of registers cached for this slave device
49999 9998 or 65535 Remote device type. 43 for Sentinel HART
1
The status registers are only available from the 49988-49999 (9987-9998) address range
if the Gateway is running firmware 7.52 or higher.
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SignalFire Telemetry
Section 4: Mounting
The unit comes with a 7/8” hole on the bottom mounting plate. A watertight conduit
fitting should be installed into this hole. The sensor is then directly mounted to the
sensor with a short section of conduit.
Direct Mount to Sensor with Short Conduit
This mounting method uses a short conduit run from the sensor and the unit is held in
place by the conduit.
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SignalFire Telemetry
Internal Lithium Battery Replacement
Battery Packs can be changed in with the node in place.
1. Open the cover from the enclosure.
2. Unplug the battery from the PCB, by depressing the locking clip on the connector.
3. Loosen the screw holding the battery door and slide the old battery out.
4. Slide in the new battery pack and tighten the battery door screw.
5. Connect the battery to the main PCB battery connector.
6. Install the enclosure cover.
WARNING: Use of any battery other than the SignalFire
part number 810-0008-02 will impair the protection provided by
the equipment.
WARNING: If the internal battery is installed the external
solar battery system or other power source may not be connected!
Cleaning Instructions
The outside of the enclosure may be cleaned with water and a mild soap with a damp
cloth as needed. High pressure washing is not recommended.
WARNING: Electrostatic Discharge Hazard! Care must be
taken to avoid the potential of creating a change on the enclosure
or antenna. Do not wipe with a dry cloth. Do not brush against
the enclosure with clothing or gloves.
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SignalFire Telemetry
Configuration/Debug
WARING: Only connect to the debug port in a safe area!
Debug and configuration information is available if a connection is made via the debug
port on the main board. A RS232 converter cable (available from SignalFire) must be
used for this interface.
Debug and advanced configuration may be done using the SignalFire SFToolKit PC
application. See the SFToolKit users manual for details on its use.
Technical Support Contact Information
SignalFire Telemetry
43 Broad St. A-403
Hudson, MA 01752
978-212-2868
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SignalFire Telemetry
APPENDIX - FCC and IC Statements
Changes or modifications not expressly approved by SignalFire Telemetry, Inc could void the user’s authority to
operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this
device may not cause harmful interference, and (2) this device must accept any interference received, including
interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference
to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to
try to correct the interference by one of the following measures:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
-- Consult the dealer or an experienced radio/TV technician for help.
Only the supplied coil antenna (Part number 810-0012-01) which is permanently soldered to the PCB may be used.
This antenna has a maximum gain of 3dB.
WARNING!
FCC and IC Radiation Exposure Statement:
This equipment complies with FCC’s and IC’s RF radiation exposure limits set forth for an uncontrolled environment
under the following conditions:
1. This equipment should be installed and operated such that a minimum separation distance of 20cm is
maintained between the radiator (antenna) & user’s/nearby person’s body at all times.
2. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a maximum (or lesser)
gain approved for this transmitter by Industry Canada. To reduce potential radio interference to other users, the
antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.r.i.p.) is not more than
that necessary for successful communication.