[Solved] Integrating Touchme TM648 with Somfy 2 AC Motor Controller for Blinds

Hi,

I have two sets of blinds installed by the developer in my flat. Having dismantled the electrical box and switches, I conclude that the control is low current. There are YTKSY 2x2x0 wires running from the box to both switches.8, and the switches short-circuit the common wire output with one of the wires input of the blind controller – upstairs or downstairs .

In the collection of Wi-Fi touch switches I used for lighting, only louvre switches designed for phase control were available (specifically, these are Touchme TM648 switches) – Their outputs upstairs and downstairs operate on 230 VAC. I'm wondering how I can safely and sensibly reconcile the controller in the electrical box with the aforementioned connectors.

The shutter controller is Somfy 2 AC Motor Controller (PCB variant – 1860210). The wires from the switches are connected to the terminals marked local push button .

I unfortunately have very limited can space and would prefer to solve the problem within the box. I was thinking of running the outputs upstairs and downstairs from the touch switches (230 VAC) via existing YTKSY 2x2x0.8, and then in the box use relays (preferably DIN-rail) with 230 VAC coils that would short-circuit the corresponding low-current control wires. I just don't know if this is safe (the YTKSY conductors have small cross-sections, but would ultimately only be used as signal lines and would not be connected to the load) and which relays I should choose. Unless I'm actually thinking in the wrong direction?

I would be very grateful for suggestions!

You cannot use YTKSY for any 230V transmission.

Thanks for the answer.

xury wrote:

You cannot use YTKSY for any 230V transmission.

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Even though it would only be for driving relays (there would be no load connected) and the specification says insulation resistance up to 1.5 kV for AC?

So would you suggest doing a 230 VAC -> 16 VDC conversion at the switches themselves? How would this best be done given the very limited space in the boxes?

From the specification (link w/w):... The cables must not be used for the connection of electrical equipment....
In another specification (from a search engine) I saw the entry: up to 150 V (utility voltage).
So far, there was also a control/power supply of 230 Vac on these cables?!

pafciowaw wrote:

Till now there was a 230 Vac control/power supply on these wires too?!

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No, previously it was 16 VDC operated by a Somfy controller and the switches were the most ordinary blind switches with springs shorting the appropriate wires. I currently have Wi-Fi touch switches that are used for phase control of the blinds, so 230 VAC appears on their contacts upstairs and downstairs and hence my problem – How to reconcile the existing wiring and the new switches. If the manufacturer of the touch switches had a range of switches for low-potential control, the subject would not be there. Similarly, if I could afford to lay a suitable cable at this stage, e.g. YDYp 3x1.5.

In my current understanding of the subject, suitable relays with 230 VAC coils would have to be used to control the 16 VDC supplied by the Somfy controller (up + down, i.e. 2 relays per switch) as if they were ordinary switches.

All told, since using the existing YTKSY cable to transmit 230 V is not an option, the only safe solution would be to put such relays at the switches themselves, but I'm afraid I might have a problem stuffing extra electronics into the boxes.

Am I understanding this correctly?

I am posting some more diagrams illustrating the whole situation.

The original layout:
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Proposal 1:


Proposal 2:

Suggestion #1 is correct in terms of NOT running power through those unfortunate cables. As for the tightness of the installation - if you can't fit in the existing boxes (under the switch) then you can cut out space in the immediate area (e.g. below) for a box for additional relays.

Added after 22 [minutes]: .

Something a'la
https://sklep.avt.pl/avt1733.html?gclid=EAIaI...MImqeXoPHt6QIVTc-yCh3JYwThEAQYAyABEgKZn_D_BwE
only you need to select similar size relays for 230 Vac.

or more expensive and taking up more space....
https://kuis.pl/przekaznik-monostabilny-finder-133182304300-p-33225.html

Thanks a lot! I also just came across this Finder 13.31 today, and while it theoretically takes up more space, the fact that it's in an enclosure and has pre-made screw terminals really appeals to me. If it turns out that they won't fit (since you need 2 per louvre switch), I'd probably be forced to cut out spaces for extra boxes anyway (although I'd prefer to avoid that at all costs through the layout of the furniture, etc).

I'm still trying to track down similar equipment, but with two independent channels. So far I can only see variants with two contacts, but controlled by a single input.

It worked – I made the circuit as in the diagram below:
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In the end I used the slightly cheaper but unfortunately also larger relays Zamel PEP-01/230 . Switching works flawlessly.

Even though I was fortunate that the louvre switches were not installed in individual boxes and I had another box with a lighting switch next to each, it was still quite a challenge to cram everything in.

Thanks for the advice, I consider the topic closed!