Nuki Opener with Siedle HTA 711 0

Nuki Opener Siedle
1

Hi all,

i failed to install my Nuki Opener with a Siedle HTA-711-0.

Current state: Door-Buzzer is functional, Doorbell is not detected

HTA-711-0
HTA-711-03024×4032 2.74 MB

Please find attached my current installation.

According to Nuki instructions the doorbell signal is on “7” (two red cables in my case), but my doorbell is still functional when 7 is unplugged. In contrast if I unplug the two grey cables from “c”, the doorbell goes silent. I suspect my 40 year old installation is a bit off from how it should be?!?!

Anyway, I tried those two scenarios:

  1. As stated in Nuki instructions.
    Remove red cables from “7”, connect them with Nuki-Yellow, attach Nuki-Green with “7” instead.
    → DoorBell not detected by Nuki. DoorBell is functional all the time (even in intermediate installation steps)

  2. Remove grey cables from “c” (-> door bell silent), connect grey-cables with Nuki-Yellow, attach Nuki-Green with “c” (-> door bell functional again!).

In both scenarios the doorBell is not detected by Nuki. What am I doing wrong?

2

Even if not relevant for you, but maybe for future visitors looking into here:

c is the ground (GND) contact, this is why removing it silenced your doorbell. Reconnecting ground via the Nuki Opener contacts made it work again, but there is no signal transported on GND, so the Opener can’t work.

7 typically is the front door ringer, but there sometimes is an additional apartment door ringer connected to input 10 (this is the case in my installation). Maybe for you those two are swapped around, as it doesn’t really matter for the functionality, only the ringing sounds a bit different for the one or the other.

As I wasn’t lucky with my installation yet, I’m still looking into this further and trying to find the proper signals on the respective Opener wires.

Best,
Chris