PLCrickster
Member
Hello everyone, I have a PLC question, in regards to using several external 24 VDC power supplies, from different machines ! I only have (2) commons on my PLC inputs, but I need (1) more common. Can I use any -24 VDC common or does it have to be from that specific power supply ? Can my PLC 24 VDC inputs come from any external source, without that sources -24 VDC common ?