Shelly Dimmer 2 - Wiring with two way switches and without neutral

  • Hi,

    I would like to install the [product]Shelly Dimmer 2[/product] :

    1. behind two way swiches (2 interrupteurs va-et-viens in French ;)).
    2. without neutral.

    You could find current wiring diagram in hereafter.

    I searched everywhere (shelly docs, forums....), and i did not find how to wire the dimmer in such a configuration. Is it possible (certainly with ByPass) ? what is the wiring diagram ? where i can find it ?

    Thanks in advance,

    Fabrice

    ShellyD2_WiringDiagram.png

  • Edit: See the next post for an easier way than described in this post.


    If you change the 2 way switches to regular 1 way than you can use the existing two wires between them to send L from the Switch 1 location to the Switch 2 location.

    And the L' going from the Switch 2 location to the Switch 1 location.

    This would give you the possibility to add a Dimmer 2 at the Switch 2 location.

    No the part I don't know if it is possible is a adding a second device because they would both use the same bypass.

    If it is possible than you can add a 1L at the Switch 1 location as you now have both L and L' at that location too.

    The 1L would get the switch input and would execute an API HTTP request (configurable under Actions) to the Dimmer 2 and hence controlling the light.

    Einmal editiert, zuletzt von torusJKL (5. Dezember 2020 um 07:13)

  • There might be an even easier way.

    Like with the previous solution use regular 1 way switches at both locations.

    Use 1 wire between the locations to forward L from location 1 to location 2.

    And use the other wire as the output from the switch in location 1 and connect it together with the output of the switch in location 2 to the SW1 input of the Dimmer 2 that is also located at location 2.

    See attached diagram.

  • I have done this from this site and works great:

    Einmal editiert, zuletzt von Admin (17. Mai 2024 um 10:56) aus folgendem Grund: Markenrechtsverletzung Bild gelöscht

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