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

What is Sx really?



I am connecting a dimmer 2 with one local wall switch (connected to S1) and one remote wall switch (connected to S2). From the remote switch I have a line which is a closed connection to line voltage or an open connection. 


I see some diagrams where a switch connects between Sx and S1 (or S2) so that the switch either closes or opens a connection between Sx and S1.  I see other diagrams where Sx is connected to neutral and the switch is openning/closing a connection between line voltage and S1.


So if I dont need (or cant) 'power' the switch with Sx, I think I should just put a jumper between neutral and Sx.


But what is the purpose of Sx? What are its electrical characteristics?



Link to comment
Share on other sites

1 answer to this question

Recommended Posts

  • 0

Sx allows the dimmer to be wired in 2 different ways. The 3 wire mode is more stable (less light fluctuations), while the 2 wire mode is providing when retrofitting to existing wiring. 

Just make sure that you follow the wiring diagrams in the manual.


Are you triggering different events with the remote wall switch? If not, you could connect both switches to S1. If you have existing wiring this will make things easier.


Also, I always add a bypass, even though technically it's only needed for loads under 50W.

  • Like 1
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...