(AI KB) Bullhorn RM510C and RM510S: Not Communicating After Install

Use these checks when a newly installed Bullhorn RM510C or RM510S is not sending data to Bullhorn Web.

Applies to: Bullhorn RM510C and RM510S. For an RM4014, see the article "Bullhorn: RM4014 Not Communicating- Troubleshooting Flowchart". For other models, submit a support case.

Before you start

  • Have the Bullhorn FieldPro app on your phone or tablet. See the article "Bullhorn FieldPro: Connect to a Unit over Bluetooth".
  • Have the unit's serial number.

Warning: turn off power to the rectifier before you touch any wiring. Follow the safety procedures set by your company and the rectifier manufacturer.

Steps

  1. Check where the dome is mounted. It must be outside the rectifier cabinet, in a clear, unobstructed area. Objects or terrain must not block communication.
  2. Check the M8 cable. It must be connected to both the dome and the RM5 I/O 4 module. Hand tighten only. Do not use tools.
  3. Check for power. With rectifier power on, the Dome Status LED on the RM5 I/O 4 module should be green. The unit powers on when power is restored to the rectifier. On its backup battery alone, a fully charged unit stays on for about two hours and then shuts down.
  4. Check the signal strength. Connect to the unit with Bullhorn FieldPro and read the signal strength. For cellular units (RM510C), the range is 0 to -120. Closer to zero is better. Aim for -70 to -99. For satellite units (RM510S), the range is 0 to 5. The unit transmits at 2 to 5, but not at 0 or 1.
  5. Send a test message. In FieldPro, open the Options menu, tap Test Message, then tap Send Test Message. Then look for the new packet on the unit in Bullhorn Web.
  6. Can't find the unit in Bullhorn Web? Clear the filters on the All Units page and check that the unit is in a group you can see. See the article "Cannot Find Bullhorn RMU Unit On Bullhorn Web".
  7. Reset the power. Turn off the rectifier. Disconnect the M8 cable from both the RM5 I/O 4 module and the dome, then reconnect it. Turn the rectifier back on. A power event packet should show up in Bullhorn Web.

Still not communicating?

Submit a technical support ticket at https://www.aiworldwide.com/contact-support/. Include the unit's serial number, the signal strength you read, and the steps you already tried.

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