Planning to connect a Shelly Plus 1 / Add-on to Paradox PGM output to get info on alarms, arming state etc. As it seems that the PGM is not a potential free relay, I can't use the digital inputs on Shelly Add-on. What would be the best way to get the states from PGM to Shelly?
PGM1/PGM2 = 100mA low-current output (each PGM).
Here's the wiring diagram (PG1 / PG2):