I plan to order an Opner and Nuki lock. In advance, I’d like to ask for support. I have a Elcom HT-802 RAB intercom, which seems to have the same connectors as the HAT-402, which is mentioned as “compatible” in the Opener compatibility list. There are only two wires to the station 1. ringing signal, 2. bus speak/open. It’s a 1+n system. There is no GND available, so I’m not sure how it will be wired and if it’s working at all.
Can one share the wiring for the HAT-402 and functionalities:
-is doorbell surpression supported?
-is opening without ringing supported?
With the wiring diagram, I can make sure and order the Opener. Once it works, I will share the results.
Here is a picture of the intercom internals: