Low Voltage on RS485 Data Bus - ELK Products

Low Voltage on RS485 Data Bus

› M1 Support Forum › Low Voltage on RS485 Data Bus

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  • December 10, 2025 at 7:53 pm #9727
    Jeffrey Selvidio

      The voltage across the +VKP and NEG on my M1G is about 1.5 volts.  This should be around 12 correct?  The AUX terminals are all around 13.4.  It’s just the Data Bus with low voltage, consequently my keypad won’t power up.

      December 10, 2025 at 8:03 pm #9728
      Jeffrey Selvidio

        I found the issue. A bent pin on the temporary connection J1 terminal.

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