3rd party touch probe on PRS Alpha

[Scott216]

I'd like to get a touch probe so I can zero X and Y. I know for the Z-plate probing, it's just closing a circuit. I assume the touch-plate is sending ground signal to the controller card when the bit makes contact with the touch plate, but I'm not sure.

The manufacturer of the probe has two different types of wiring options, either PNP or NPN output. Attached is the wiring diagram the manufacturer sent me. Will this work with the ShopBot PRS Alpha? If so, which one, PNP or NPN?

Here's a link to the probe:
https://topcom.cz/products/dig3d/

Thanks