Modbus RTU Slave Cabling Requirements

RS-232 Interface Cable

 Note: the Modbus RTU Slave Interface requires RTS/CTS hardware flow control.

The cabling diagram below illustrates the interface for a serial board DB-9 connector to DB-9 connector.

RS-422 Interface Cable

Refer to documentation provided with the RS-422 serial board.

More information

Modbus RTU Slave specifications.