How to adapt a 4-wire low-voltage chime for the Netatmo Doorbell

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GEORGzer
Posts: 2663
Joined: 14 Jan 2014, 18:14

How to adapt a 4-wire low-voltage chime for the Netatmo Doorbell

Post by GEORGzer »

There are low-voltage chimes that are connected with 4 wires and are officially not compatible with the Netatmo Doorbell.
Those chimes are directly connected to the transformer, using 2 of the wires. The other 2 wires are connected to the push-button.
They work like 2-wire chimes, except they have separate power- and switch-connectors.

Digital chimes, playing melodies might use this type of wiring to assure the music gets played all the way to the end, even after the push-button got released.

4-wire chime.gif
4-wire chime.gif (223.68 KiB) Viewed 2268 times

To connect the Netatmo Doorbell to that kind of chime, you need to rearrange the existing wiring on the chime's site:
  • Switch off the power.
  • Disconnect the 2 wires, going to the push-button and use a piece of wire to bridge the 2 now empty contacts on the chime.
  • Disconnect the live-wire from the chime and replace it with one of the wires going to the push-button.
  • Connect the now free live-wire to the remaining wire, going to the push-button, using a terminal.
  • You also have to replace the old push-button with the Netatmo Doorbell and connect the Chime-Module to the 2 contacts of the chime, that are not connected together by the bridge wire.



For a better understanding, I didn't change the color of the push-button wires.
4-wire chime Netatmo.gif
4-wire chime Netatmo.gif (343.29 KiB) Viewed 2268 times

This way, the Netatmo Doorbell is fully functional and the chime only receives power when the button gets pressed.



Note: If you have a digital chime, playing a melody, that music will be cut-off when the button gets released.
This is a work around to keep the existing 4-wire chime in use but replacing the chime by a 2-wire model would be recommended longterm.

Side note: I'm not a Netatmo employe, I'm more like a freelance forum janitor who likes helping people with wiring stuff...
GEORGzer
Posts: 2663
Joined: 14 Jan 2014, 18:14

Re: How to adapt a 4-wire low-voltage chime for the Netatmo Doorbell

Post by GEORGzer »

For certain chimes with 230V build-in transformers like for example the Honeywell D3230, Netatmo provided instructions on how to integrate the Doorbell without the need of a workaround:


See section "Chime with an internal transformer"
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