Quote Originally Posted by battwell View Post
no- it has to be nc (but could use a 2803 inline to invert signal)
why would you want to? nc allows probe to be checked ready - ie not stuck and connected before probing and after backoff
I use a touch plate on the high-speed setup - this is naturally N/o circuit, if its shorted or N/c then probing does not trigger, i was looking for an easy install :)