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Interface Manual
Sentinel Node Digital
The SignalFire Sentinel Node is a device with the following features:
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Two counter/frequency inputs, up to 2kHz. Open drain or pulse input supported
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Reports state of dry contact inputs, open/closed
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Optional report on state change
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Two 32bit count totalizers
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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 (DIP switch) Modbus ID
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AES128bit Encryption
Rev 1.11
SignalFire Model: Sentinel-DI-DC
SignalFire Telemetry
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Summary of Contents for SignalFire Sentinel Node Digital
- Page 1 Interface Manual Sentinel Node Digital SignalFire Model: Sentinel-DI-DC The SignalFire Sentinel Node is a device with the following features: Two counter/frequency inputs, up to 2kHz. Open drain or pulse input supported Reports state of dry contact inputs, open/closed Optional report on state change...
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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 1.11 SignalFire Telemetry... - Page 3 Markings Device Label DC Converter Rev 1.11 SignalFire Telemetry...
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Page 4: Connections And Components
The Active LED (green) will blink at boot up and will blink rapidly for 2 seconds before the counter values are sent to the gateway. The ERROR LED (red) will blink to indicate an error condition. Scan/Checkin Button If this button is pressed the Sentinel will send the current counter values to the gateway. Rev 1.11 SignalFire Telemetry... - Page 5 Check-in period selection Modbus ID setting 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. 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 Rev 1.11 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...
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Page 8: 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 9 The counts accumulate, and the current counts are stored into non-volatile memory every 15 seconds. If the system is reset the counts will revert to the last stored value from non-volatile memory. The system also reports the state of the contact closure input (open or closed) at the time of check-in. Rev 1.11 SignalFire Telemetry...
- Page 10 To enable the digital debounce, open the configuration window for the node in the SignalFire Toolkit and select Digital Input Debounce from the Settings menu. A typical value for a dry contact would be 100mS. Any extra counts due to contact bounce within the debounce time setting will be ignored.
- Page 11 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 ID which the gateway will use to store its unique data.
- Page 12 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 1.11 SignalFire Telemetry...
- Page 13 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 14: 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 1.10 5/2/2024 Initial release – Forked from Sentinel Manual 1.11 11/1/2024 Add disposal information Rev 1.11 SignalFire Telemetry... - Page 15 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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