Jump to content

Welcome to Smart Home Forum by FIBARO

Dear Guest,


as you can notice parts of Smart Home Forum by FIBARO is not available for you. You have to register in order to view all content and post in our community. Don't worry! Registration is a simple free process that requires minimal information for you to sign up. Become a part of of Smart Home Forum by FIBARO by creating an account.


As a member you can:

  •     Start new topics and reply to others
  •     Follow topics and users to get email updates
  •     Get your own profile page and make new friends
  •     Send personal messages
  •     ... and learn a lot about our system!



Smart Home Forum by FIBARO Team

  • 0

FGD-212 and motion sensor.




I'd like to use a FGD-212 to control a light into a corridor. I'll use a rule (send by my Eedomux box) to set the FGD-212 at 100% during the day and 20% during the night.

I want to start the light by connecting to the FGD-212 a motion sensor. I'm thinking of using two Legrand Ecodetecteur 078458 (2 wires sensor) which are already located at both side of the corridor.

Is it possible to connect a motion sensor to a FGD-212 (as a toggle swich) ?

As the motion sensor need to be connected all the time to the electric source, does the FGD-212 provide some power to the motion sensor at any time ?


I'm giving here some drawing of the connections.


Thank you for the help

Please login or register to see this attachment.

Please login or register to see this attachment.

Link to comment
Share on other sites

4 answers to this question

Recommended Posts

  • 0


Short answer: It is not possible to combine it like this!!!

Long answer: Connect the relay winding to the sensors instead of the light bulb. Then switch inputs S1 and S2 on the FGD-212 module with the relay contact.
Pay attention to the minimum load on Legrand sensors 0.02A (or 3W according to the manual). Functionality must be verified.
Good advice over gold: Use a detector with a relay output instead of a semiconductor element. Sometimes they have a voltage output, but they only switch the phase with an internal relay.



Link to comment
Share on other sites

  • 0
  • Inquirer
  • Good afternoon Martin,


    Thank you for your advice, as I'm not a specialist, can you give me a small drawing, even draw by hand 🙂, because I'm a little bit confuse by the relay connection.


    Thanks a lot

    Link to comment
    Share on other sites

    • 0


    I assume you wanted to control the same thing from both places.
    This is what the picture is drawn for.
    If you wanted to use switch S1 to turn the light on and S2 to turn it off (with a connection to different sensors??), you would have to separate the sensors and add a relay to the second sensor as well.
    You're trying to fit one two-wire system to another and it just won't work. Try it with a relay and see. If you have already purchased items, this will be the smallest item.


    Please login or register to see this spoiler.


    Edited by Martin_N
    Link to comment
    Share on other sites

    Join the conversation

    You can post now and register later. If you have an account, sign in now to post with your account.

    Answer this question...

    ×   Pasted as rich text.   Paste as plain text instead

      Only 75 emoji are allowed.

    ×   Your link has been automatically embedded.   Display as a link instead

    ×   Your previous content has been restored.   Clear editor

    ×   You cannot paste images directly. Upload or insert images from URL.

    • Create New...