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MGE PMM; Where can I find Modbus RJ45 connector label and wiring correction

Published date: 16 August 2019

Issue:
Modbus RJ45 connector label and wiring correction


Product line:
PMM 400 / PMM 500


Environment:
PMM 400 / PMM 500


Cause:
Modbus RJ45 connector 4-wire diagram has RXD wiring labeled incorrectly base on the wiring harness connected to the NMC interface board.  Also, note that the example below shows the master controller wired to the RJ485 Modbus connector TX to TX and RX to RX.  Normally the Modbus controller to the device the TX would go to RX and RX to TX, but the wiring hardness does this Modbus controller swamp.


Resolution:

Below highlight the corrections to connector/wiring for a Modbus controller to the PMM.


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