When the tenant grants access to the visitor, the ERU relays are not changing state. The communication is only RS485 and USB?

 USB/RS485 module and RS485 bus is connected together. The USB/RS485 Module connection to the PC should be one-to-one connected and not mutually connected to the main RS485 BUS;

  • Separate the two RS485 lines;
  • - RS485 BUS is separate from the USB/RS485PC connection.

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