... (relay),1A0,MODBUS communicationECU-321LPi controller,3UI,1 TIinternal,2DO(relay),1A0,ECU-222Pi controller,2UI,1 TIinternal,2DO(relay),2A0,MODBUS communicationECU-222-LPi controller ... ,2UI,1 TIinternal,2DO(relay),2A0ECU-402Pi controller,4UI ...