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Interface Manual
Sentinel Node
Thermocouple
The SignalFire Sentinel Node is an Intrinsically Safe device with the following features:
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Standard SignalFire Sentinel RS485-Modbus Node
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RS485 connection to a Thermocouple Interface Board
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Type K and J thermocouple boards are supported (other types on request)
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Low power operation from an intrinsically safe high capacity lithium primary
battery pack
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Optional solar battery system for routing nodes or rapid data collection
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Sends data to a SignalFire Buffered Modbus Gateway
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AES 128Bit Encryption
Rev 1.6
SignalFire Model: Sentinel-yTherm-XXXX,
where y is TC type (K, J, etc.)
SignalFire Telemetry
1
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Summary of Contents for SignalFire Sentinel-yTherm Series
- Page 1 Thermocouple SignalFire Model: Sentinel-yTherm-XXXX, where y is TC type (K, J, etc.) The SignalFire Sentinel Node is an Intrinsically Safe device with the following features: Standard SignalFire Sentinel RS485-Modbus Node RS485 connection to a Thermocouple Interface Board Type K and J thermocouple boards are supported (other types on request)
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Page 2: Specifications
Specifications Enclosure Size 3.5” tall × 5.0” wide × 5.0” deep Power Source Internal IS Lithium battery pack SignalFire Part Number: 3BIS External Solar battery system SignalFire Part Number: Sentinel-HCSolar DC-DC Converter SignalFire Part Number: DCDC-Sentinel Other external power supply meeting the power entity parameters from the control drawing. -
Page 3: Connections And Components
The Active LED (green) will blink at boot up and will blink rapidly when the sensor is being powered and read. The ERROR LED (red) will blink to indicate an error condition. Scan/Checkin Button If this button is pressed the Sentinel will take a reading from the thermocouple and send those values to the gateway. Rev 1.6 SignalFire Telemetry... - Page 4 Network selection Check-in period selection Thermocouple mode enable All settings are made using the SignalFire Toolkit PC application and a serial programming cable. WARNING: Perform the steps in this section (Setup) in a safe location only. Using the SignalFire Toolkit The SignalFire Toolkit application can be downloaded at www.signal-fire.com/customer.
- Page 5 To set up a legacy Sentinel to use encryption, click the checkbox labeled Enable Encryption inside the Set Corporate ID box. All newer Sentinels come with this option enabled with “signalfire” as the default encryption key. Corporate ID...
- Page 6 Sentinel type for Thermocouple operation if it is the default Modbus mode. To do this, select Thermocouple in the Set Sentinel Type option under the Settings pull down menu. Rev 1.6 SignalFire Telemetry...
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Page 7: Sensor Connections
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. Strip the wires so that there is minimal exposed un-insulated wire when inserted into the screw terminal. - Page 8 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.
- Page 9 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. 0x32 for Sentinel Thermocouple Rev 1.6 SignalFire Telemetry...
- Page 10 WARNING: The Sentinel must be mounted in a location free of high vibrations. Over time vibrations can damage the Sentinel or battery pack, which could impair its safety ratings. Do not mount directly to continuous vibrating equipment such as pumps or compressors. Rev 1.6 SignalFire Telemetry...
- Page 11 Connect the battery to the main PCB battery connector. 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...
- Page 12 Debug and configuration information is available if a connection is made via the debug port on the main board. A USB converter cable (available from SignalFire) must be used for this interface. Debug and advanced configuration may be done using the SignalFire Toolkit PC application.
- Page 13 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.
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