Understanding Source and Sink Wiring Methods for S7-1200 PLCs
Understanding Source and Sink Wiring Methods for S7-1200 PLCs Sink Wiring Method – Definition: Also known as common cathode wiring, this method connects the common terminal “1M” of the S7-1200 to the negative terminal of the power supply. Current flows from the common terminal of the PLC into the input terminal. – Example: When using … Read more