Quote Originally Posted by northbynate View Post
It seems concerning that, regardless of the reason, failure of the charge pump output can result in an estop being ignored. I was planning on replicating OP's design with the charge pump output controlling my contactor. Now I'm not so sure. What are your thoughts on this?

1) This is the only instance I've heard of of the Charge Pump output failing.
2) Use a Safety relay to control your contactor, with the charge pump signal as part of an E-Stop circuit controlling the safety relay. Any E-stop drops the safety relay, which drops the contactor.