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Interface Manual
Sentinel Node Analog
The SignalFire Sentinel Node is a device with the following features:
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Powers a single 4-20mA at 13.5V or a single 1-5V sensor at 12.5 or 18.0V
(software selectable)
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Low power operation from an onboard DC-DC power supply
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Sends data to a SignalFire Buffered Modbus Gateway
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Settable Modbus ID
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AES 128bit Encryption
Rev 1.14
SignalFire Model: Sentinel-Analog-DC
SignalFire Telemetry
1
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Summary of Contents for SignalFire Sentinel Node Analog
- Page 1 Interface Manual Sentinel Node Analog SignalFire Model: Sentinel-Analog-DC The SignalFire Sentinel Node is a device with the following features: Powers a single 4-20mA at 13.5V or a single 1-5V sensor at 12.5 or 18.0V (software selectable) Low power operation from an onboard DC-DC power supply...
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Page 2: Specifications
WARNING: The use of any parts not supplied by the manufacturer violates the safety rating of the equipment. L’utilisation de toute composantes différentes du manufacturier élimine la sécurité intrinsèque du produit Rev 1.14 SignalFire Telemetry... - Page 3 Markings Device Label DC Converter Rev 1.14 SignalFire Telemetry...
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Page 4: Connections And Components
The ERROR LED (red) will blink to indicate an error condition. Scan/Checkin Button If this button is pressed the Sentinel will apply power to the sensor for the configured sensor on time, read the analog sensor value and send the collected sensor data to the gateway. Rev 1.14 SignalFire Telemetry... - Page 5 Modbus ID setting Sensor on time/supply voltage All settings are made using the SignalFire Toolkit PC application and a serial programming cable. The Modbus ID can also be set using the DIP switch (in older models only). WARNING: Perform the steps in this section (Setup) in a safe location only.
- Page 6 Serial Port Settings Sentinel Information Set Corporate ID / Encryption Key Status of Last Operation Reported Sensor and HART Values Sentinel Settings Alarm Threshold Settings Rev 1.14 SignalFire Telemetry...
- Page 7 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 8 The Sentinel Node will supply either 18.0 Volts (HIGH) of 12.5 Volts (LOW) in 1-5V mode, selectable in the SignalFire Toolkit. In 4-20mA mode HIGH is automatically selected and is the only option, it will supply a minimum of 13.0V to the sensor at full load of 20mA. The sensor warm-up time must also be configured. The default is 2 seconds which is used for most pressure and other simple sensors.
- Page 9 The default is "0". The deadband zone can be set in whole number increments which works as follows: Any negative reading within the defined "deadband" will be reported as zero. Any values below the deadband will be reported as the actual value. Rev 1.14 SignalFire Telemetry...
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Page 10: Sensor Connections
Sensor Connections Wiring Requirements Follow these guidelines when connecting sensors to the SignalFire node. See pictures for proper wire routing examples. Cables entering the enclosure must be run as pictured. DC power cable should be run through the cable gland and gland should be tightened. - Page 11 Sentinel Node. The negative terminal (Sensor-) is connected to the center terminal of the Sentinel Node. The left/bottom terminal (Ground) may be left unconnected, or if the shielded cable is used it may be connected to the shield. SENSOR + SENSOR - Rev 1.14 SignalFire Telemetry...
- Page 12 To disable this feature, select Set Sensor Power Mode HIGH under Settings. This only sets the Sensor Power Mode back to High and does not disable the 1400mA alarm threshold. This option is not available in 1-5V mode. Rev 1.14 SignalFire Telemetry...
- Page 13 Sentinel Node. The negative (Sensor Ground) is connected to the bottom terminal of the Sentinel Node. The middle terminal (Sensor V Out) is connected to the voltage signal output from the sensor. SENSOR Power SENSOR Signal SENSOR Ground Rev 1.14 SignalFire Telemetry...
- Page 14 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 15 ATTENTION: Le produit Sentinel doit être installé dans un endroit libre de hautes vibrations. Sans quoi avec le temps, des possibles dommages pourraient compromettre la sécurité intrinsèque du produit. Les installations sur équipement en vibration constante (pompes, compresseurs) doit à tout prix être éviter. Rev 1.14 SignalFire Telemetry...
- Page 16 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.
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Page 17: Product Disposal Information
EPA’s electronics recycling page • By following these guidelines, you help reduce waste and support environmental sustainability. Revision History Revision Date Changes/Updates 1.13 5/2/2024 Initial release – forked from Sentinel-Analog manual 1.14 11/1/2024 Add disposal information Rev 1.14 SignalFire Telemetry... - Page 18 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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