Powtran PI9000 series User Manual page 230

Appendix I
9K-RS485_S connect to 9KLCB control board
9K-RS485_S connect to 9KSCB control board

Link RS485 communication cables to inverter control terminals (SG+), (SG-).
 When using RS485 transform, connect Inverter "SG+" to RS485 "T+", Inverter
"SG-" to RS485 "T-".

After Confirming connection again, turn on inverter power.

If connection is right, set communication parameters as following:
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