varlogic modbus communication user manual - Schneider Electric

NRC12Modbus applicationUSER’S MANUAL6.1.1 RS-485 port and power supplyConnector A : Connector type is Phoenix Contact MSTB 2,5/8-ST-5,08.Pin Id DescriptionA1 RxD1 + Rx RS-485 4-wire busA2 RxD0 - Rx RS-485 4-wire busA3 Common GroundA4 TxD1 + Tx/Rx RS-485 2-wire busA5 TxD0 - Tx/Rx RS-485 2-wire busA6 PG 1 MΩ to ground. Protective ground.A7 V1+ Power supply + 10 …+ 30 VDC or10…20 VAC (2 W)A8 V2- Power supplyTable 4a: RS-485 port A pinsConnector B: For cascading purposes. It is connected parallel withconnector A. Note the difference in pin count and order. Connector type isPhoenix Contact MSTB 2,5/7-ST-5,08.Pin Id DescriptionB1 RxD1 + Rx RS-485 4- wire busB2 RxD0 - Rx RS-485 4- wire busB3 Common GroundB4 TxD1 + Tx/Rx RS-485 2- wire busB5 TxD0 - Tx/Rx RS-485 2- wire busB6 V1+ Power supply + 10 …+ 30 VDC or10…20 VACB7 V2- Power supplyTable 4b: RS-485 port B pins10