What is the A+B- terminal of analog module S04XA used for?

2016-08-17 14:09:07 Xiamen Haiwell Technology Co., Ltd. Read

The A+B- terminal of S04XA is a RS485 communication port. When S04XA is hung behind the host PLC as an extend module, the two terminals do not need any wiring; When the S04XA is used as a remote module(It is used independently without hung behind the host PLC ),  the other master stations can read and write the data through the RS485 communication port.