Fibaro Dimmer 2 Ceiling Rose Installation


(Mikey) #1

I am looking to fit a Fibaro Dimmer 2 module. In the living room, which I am looking to hook up first, I have a two wire, two way switch with one switch in the living room and the other in the kitchen. There isn’t room in the switch box for the unit so I am looking at putting it into the ceiling rose which should have space.

My first question is that I am not 100% sure on the existing wiring of this light (perhaps I should start upstairs where it is more clear and simple). Below is a photo of the arrangement so hopefully someone can help?


The switched Live and Neutral into the light itself are clear but I assume that I have a junction box in the ceiling given that there isn’t a direct connection between the two switches in the ceiling rose. There are then bundles of lives and neutrals each with 4 cables in and these are connected to a single chocolate block. This is not what I expected based on the below (which is exactly how the upstairs is wired).

My second question is, once I have identified the additional wires, if I were to fit the Fibaro in the ceiling rose, given that there is a separate junction box would I wire it up as if it were a single toggle switch? This looked to be the case for the Dimmer 1 module but this wiring diagram doesn’t exist for the Dimmer 2. If so then most of it is clear, except which wire I use for the “com” live feed for the switch. Is that one of the cables bundled together and I need to work out which it is?


(Robin) #2

Here’s a sketch I made earlier.


Wireless Switch for New Light in UK - Best Solution?
(Mikey) #3

Thanks, much clearer now. I guess it doesn’t matter if my switches are two core because wiring it in the ceiling rose it will have a neutral anyway?

So from my picture above I am clear which is L (can take it from the grouped lives), S1 (the switched live which is black in my photo and marked with red tape?), N (can take it from the grouped neutral wires) and the Load which is directly connected to the live of the light. However, which do I take as the switch common? Have I missed something and it is marked in the group of lives? Or do I need to get the multimeter out and find which one has continuity with the switched live?


(Robin) #4

Switch live is the wire going to the live terminal of the light fitting (blue wire with brown sleeve on diagram, left black wire in your photo)


(Mikey) #5

Yep and that goes to S1. But which goes to Sx?


(Robin) #6

The red that arrives in the same flex as the switch live.


(Mikey) #7

Thanks yes. I will just have to dig a bit deeper until I can see the flex as well.


(Mikey) #8

Thanks for your help Robin for the purposes of anyone else finding their way here the wiring diagram above works perfectly for a 2 way toggle switch.

The only piece of information required to complete the setup is the following custom device type handler [RELEASE] Fibaro Dimmer 2 (US) to be able to set the parameters of the fibaro.

About to order another!


(Simon) #9

Cool, so the US device handler worked with the EU version? The author (Eric M) wasn’t so sure it would. Might try that DH myself since I quite like what Eric does with his code.


(Mikey) #10

I had t even thought of that. Is there another version? Certainly the toggle switch parameter works fine. I don’t really want to use any of the other settings anyway.


(Robin) #11

DTH wise, there is no variation between US / EU versions that I’m aware of… yhevhandker should work for both.


(Simon Tether) #12

Thought I’d share this, maybe of use to someone.

I’ve just fitted a fibaro dimmer at the ceiling rose and used this:

The metal bracket slotted behind the existing ceiling rose wiring plate and the new dome had lots of room to house the fibaro dimmer and a fibaro bypass

Saved hacking any ceiling and pushing the fibaro in the void and all the light wiring stayed in place on the existing ceiling rose wiring plate.

I replaced the E27 end with the old B22 end