In the Mach 2 manual it shows limit switches wired together with a resistor right, but if you have a breakout board do you still need the resistor? I have a board and I,m unsure. And this board has a diagram that shows a E-stop button just wired up to two terminals, is that all that's necessary for an E stop and breakout board? My board comes from cnc4pc.com. Good board simple schematics, but when you're electrically challenged fear sets in. Any advise and help for a wired up nooby???

String, you do NOT need the resistors. That is a hold over from way back. It needs to be removed from the manual. Terry

Thank you Terry, I was rather confused by that entry, I guess I'll disregard and cary on. Thanks again.

Yep that one got me also. I had to ask too.  Terry