Elcom i2 Bus (BVM-100)

[Schiemanskie (Florian)]

Hi Jerome,

see following posts:
General first working setups by Thyraz and Florian with general setup + wiring Pictures:

Elcom i2 Bus (BVM-100)

Hi Tobias , thanks for your hint regarding BFT-200 connection. I am using the BHT-200 which should have the same hardware setup :). If I understood you correctly you did the following: [BHT200_Opener] you replaced the original board from the BFT-200 with the RSR-200, everything else is connected as original Then you connected the Nuki Opener to the utton contacts for the open button from the BFT-200 Could you please share which cable colors of the Nuki Opener were connected to the RSR-200 …

Elcom i2 Bus (BVM-100)

Hi Florian, yes I replaced the orginal Board with the RSR-200 like described in your photo. Then I used the 2 big pads of the button (on the backside of the circuit board where the red arrow in your photos points to. To solder cables to the pads, I removed the dark coating with a cutter knive. For the wiring look at the section “Analogue intercoms” in this document: https://developer.nuki.io/t/howto-connect-the-nuki-opener-to-unknown-intercom-systems/2689 You need yellow (ring detection), b…

Elcom i2 Bus (BVM-100)

Hi Florian, maybe this helps to clarify it: [Opener] The relay contact in the Opener is used to simulate the button press on the intercom. As the purple wire is also used as GND signal for the ring detection, we connect it to the pad of the button that is connected to GND on the circuit board. This way the Opener already has the GND signal to measure Voltage on it’s ring detection input (yellow wire). Now we need a voltage that we can measure when the intercom is ringing. The easiest way …

My working setup with some pictures:

Elcom i2 Bus (BVM-100)

So I finally got it running with my Elcom BHT200! Things needed: BSR-200 Module as stated by Tobias and also Florian, thank you guys! I soldered 2 cables on the front connections of the board (Blue and Purple Cable) you don’t need to solder it on the backside with the black coating. Ring detection yellow to BUS+ as already mentioned but make sure to follow the procedure in the app precisely! (Ring - door not open - Ring etc. To let the Nuki learn the different voltages) I am writing on my p…

But you are right, maybe we should go on and have a better summary in place