Autonomous system (without networking), MiniPLC (a, b)

There is only a process station connected to the I/O bus at the most simple topologies, be it a MiniPLC or touchscreen-based IPCT.1.

I/O modules and MiniPLC

The bus is connected directly at the RS485 COM3 interface (terminals K+, K-) of the MiniPLC process station. There is nothing else connected to the PLC apart from 24 V power supply. The IPLC is operated using buttons and LCD display.