nkwai Posted October 16, 2013 Report Share Posted October 16, 2013 Hi, maybe this will be a stupid question, but I don't want to burn something. I have a Vision 120 with transistor outputs, two of the outputs are turning on two relays. The relays have a common 0V and then the +VO from the PLC. If I connect a switch using the same +VO to manually control the relays, do I have to put a diode on the wire coming from the PLC? or there is no problem if current comes backwards? There is also the possibility that the output will turn on while using the manual switch is this a problem? Thank You. Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.