Which input on the card? To get it so the unit turns off the torch AND stops motion you have to put MACH into RESET. There are several ways to do that:
Make the break away swtich NC (Normally closed) and replace the EPO jumper with the two switch wires.
Give it a dedicated input and make it a true LIMIT in MACH (++ or --)
You don't want a feedhold or to use the feedhold input//// You need TRUE limit or E_STOP that turns off all of the outputs. You may lose position but that is the least of your problems of the torch has hit something and broken off!
We solved our problem in our cutting shop without a breakaway fixture. I fired the last guy that damaged a torch and magically there has not been another incident in over two years!
TOMcaudle
www.candcnc.com