Connecting a Fibaro Universal Dimmer in a 3-way lighting circuit?

Other Devices & Integrations Lighting & Load Control
1

Hi!

I have an old house with 2-wire (no neutral) electric installations.

In our hallway I have three light switches controlling the same ceiling lamp (two 3-way switches and one intermediate switch).

I would like to install one of my Fibaro Universal Dimmers in this installation. The switches are toggle (bi-stable) switches today, but I have bought parts to convert them to momentary switches.

I have attached photos of the threes switches and the color of the different wires.

Could someone give me some pointers to as (1) in which light switch I should place the Fibaro dimmer module and (2) how it should be connected? I assume it should be placed with the intermediate switch that has with four wires?

2

You may have a look (Fig.4) here http://www.vesternet.com/resources/application-notes/apnt-52

3

I read Vesternets instructions and are still finding it difficult to understand how everything should be connected. If it is not a big hassle, could you draw a easy chart using the different colored wires above?

4

Could you first measure which color of the wires is for what? I believe, black and red are switch-Live, gray in the upper photo is Live (constant), while gray in the lower photo is Com (the one to the lamp)? Do you have Live and Com available in one of your three switch boxes, which is needed for the Fibaro dimmer!