Thanks MN300 I am pretty sure I will need a relay. I need to check it out but I think the voltage is 24 volts from the E-stop on the machine. I am using a cheap breakout board and the pin used on it is pin 10. I am sorry I can't explain any better but electrical work is not one of my strong suits, On the relay I would like to figure out how to get it to either turn both machine and breakout board e-stops on or off at the same time. I really need a diagram if someone can post one. Thanks all for the help you are trying to give me. I am pretty sure that the breakout board will be of a different voltage than the breakout board. When I posted this I thought I might connect with someone that has retrofitted a Bridgeport boss 6. The mach 3 is only running my motion of X,Y,Z