Quote Originally Posted by gabi68 View Post
Well, taking your advices I have a relay with appropriate socket on the way
https://www.rapidonline.com/Relpol-R...-Relay-61-6063
and I will connect Pul-, Pul+,Dir- and Dir+ and power the relay from a 12V power supply.

I also bought this fancy button
https://www.amazon.co.uk/gp/product/...?ie=UTF8&psc=1 .

The last advice need it is where should I connect the button to make the change of the inputs?

Thank you
Gabi
That relay will work just fine, I don't think you will have problems with it. If you switch all four wires then you don't need to care about anything else, just that you connect all the wires right. Good luck.