Keypad input to trigger something

[HeneryH]

Any ideas on the best way to take this door keypad system as a trigger input into the Gateway?  I'd like to do various things like turn lights on and trigger the security DVR system.  The keypad is 12vdc so I basically have a 12vdc and NO Gnd output that I need to trigger the Gateway.

  <-- Oops, image not showing.  Why do I always have such a hard time with Google Photos.  They are usually so easy with everything.



Thanks for any ideas.

[Felix]

From the schematic it looks like this is a 12V active low interface. Ie you get your GND when the outputs are asserted.
Should be pretty straight forward to get these hooked up to digital pins through some optoisolators.