Factory automation PLC control unit and I/Os

The PLC Control Unit in a Programmable Logic Controller (PLC) is the main building block which processes data coming from input devices and controls outputs. It can be integrated with I/O modules to provide the required functionalities. The PLC control unit also enables connectivity to various fieldbuses including PROFIBUS, Modbus and CAN open, industrial Ethernet such as Profinet, EtherCAT, wireless technologies and to the backplane bus of the system.