Nuki Opener Ring Detection on 8V AC circuit and 12V opener circuit (Generic Analog)


I am having trouble wiring my Nuki Opener to my fully analogue bell and opener.

Here is the diagram of my bell and opener WITHOUT nuki which is currently working fine.
But I cannot figure out how to connect the nuki opener.

Would be great if you could help me out.
I want to use the ring detection and ring to open capabilities.


Here is my final setup with these extra parts:

  • 12V DC transformer
  • 12V AC transformer (for door opener, so that it makes the buzzing sound)
  • 12V Eltako switching relais
  • Nuki config: Siedle HTA-811
  • no additional config needed from nuki support