Roller shutter NO Neutral

Devices
1

Hello :wink:
In my house at the moment I have three electric shutters whose switches work without Neutral cable.
In two of them I found the Neutral blue cable and connected normally with the Fibaro Walli shutter switch BUT one of the three does not have a blue cable in the wall box. :zipper_mouth_face: :face_with_spiral_eyes:

What solution is given to me to make it smart and work with homey pro. Any sollution with no neutral cable?

Thanks a lot guys.

2

I’m fairly sure such a device doesn’t exist.

2 Likes
3

so all roller shutter switches needs neutral wire ? :confused:

4

As far as I know, yes.

1 Like
5

There will probably be another color cable which is used as the blue one.
So, if you are not sure don’t do it yourself and ask someone who knows more about electricity.

1 Like
6

I found a solution from HA community. Can someone help to expain more please?

He make it with Shelly 2.5

Post from the user:

I managed to make this work.
So the issue was, that - in the original setup - there is no N in the wall switch, so I cannot put a smart device behind the switch. Rewiring is not an option because I did not want to start such work in the house.

So here is the solution:

Original setup

Wall switch
3 wires and a switch: incoming L and a 2 way switch that directs this L into 2 cables (let’s call them Lup and Ldn) which go to the shutter housing. So depending on which direction you activate with the switch, L gets connected to Lup or Ldn and goes to the shutter’s input. Note that the wall switch has no N!

Shutter housing
Incoming N cable and the Lup and Ldn live wires which are coming from the wall switch. And - of course - the shutter motor with inputs for (N, Lup, Ldn).

“Smart” setup

Wall switch
The incoming L cable is now connected directly to Lup and besides goes into a momentary switch that - when pressed - connects L to Ldn. In other words: Lup is an L from now on, and Ldn is activated momentary by the switch - when pressed.

Shutter housing
Lup (which is a constant L from now on) is used to power a Shelly 2.5 in shutter mode. N (which was already in the housing) also powers the Shelly and the shutter’s N. Shelly’s 2 outputs go to the shutter’s Lup and Ldn. Ldn (which now acts as a momentary L) is connected to the Shelly’s SW inputs.

And that’s it. When you press the wall button it connects L to Ldn, which gives a signal to Shelly’s SW inputs. Every press moves Shelly to the next stage in an up/stop/down/stop rotation. No rewiring and works fine.

7

If you need help explaining this (it’s explained quite clearly) you may want to ask someone with more electrical experience to help you out.

1 Like
8

Couldn’t agree more.