Shelly 1 with ABB Latching Relay, Two-way switch.

teddyblanstone

Hi All,

I have a latching relay (see picture of the E252), with momentary switches that toggle the relay on or off. There are two switches, located in separate buildings. The wiring to the switch is pretty simple with a live going to a neutral that triggers the relay when pressed. I hooked it up without the SW and that seems like the correct wiring. However, I am not sure which Button Type will work. I tried a couple options with it connected it and it gave all kinds of issues to the relay. It seems to me that it should be a simple Momentary switch in the settings, but this just keeps clicking at the relay.

Lastly, I am unsure how it will get the feedback from the relay to the Shelly as to the state of the light (i.e., on or off). I have a separate wiring for the built in indicator light in the switch. Perhaps there is a way to use that to inform the Shelly 1 what state the light is in?

Sorry for the rambling question and lack of a diagram. Happy to take some more pictures of the wiring or other, if that helps.

Thanks.

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utschu

Correct wiring is shown here:

https://shelly-forum.com/index.php?atta…ung-eltako-png/
(if latching relay and Shelly shall be operated)

Correct setting should be: Momentary.

Often intention is to replace the latching switch by a Shelly.

Please let us know what you are intending to do/achieve?

Local Status indication needs to be connected to O connection of the Shelly.

teddyblanstone

Thanks.

The wiring seems to make sense. I was trying to install it by the switch, before the relay...not after like shown here. I am trying to maintain the existing two physical momentary switches and also use the Shelly to automatically turn on and off the outdoor light.

Does that make sense?

Thanks again.

teddyblanstone

Now, how that diagram translates to this picture is confusing me. The last one in that row, the one that is up, is the light I am trying to put on the Shelly v1.

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utschu

You could replace the the latching relay by a Shelly and have the two momentary acting push buttons wired directly to SW input of the Shelly.

Depending on existing wiring/cabling the Shelly could be installed behind one of the momentary acting push buttons (if a Neutral wire would be available, or in the Switchboard (instead of the latching relay, by using on of the available DIN rail clips).

Such you could switch the light by use of one of the Push buttons or via Smartphone.
Shelly could be confirgured that Light would go off by pressing local Push Button, by Smartphone or after a fix configured Time by Shelly (Off delay).

Without having to pull new wires, easiest would be to swap the existing latching relay by a Shelly 1.

This wiring shows the situation if the latching relay would be replaced by a Shelly 1:

https://shelly-forum.com/index.php?atta…rschaltung-png/

Here a Link to a Shelly clip which holds the Shelly on a DIN rail:

https://www.print-worth-3d.de/product-page/h…Cr-shelly-1-1pm

If the local Push Buttons would be equipped with a Lamp, this supply would either have to come from local available Line (Lamp would always be on), or by use of a separate wire which would then have to come from O terminal of Shelly (Lamp of local Push Button would only be on if Light would be on).

In the APP the current state of light could be checked by looking at the small vertical Line of the on/off button (grey = light is off / light blue = light is on, if activated in the App).

Least effort might be to leave the Switchboard wiring as is and install the Shelly behind one of the existing Push buttons, if a Neutral is available behind one of the two Push buttons.

If you want to do it this way, it would most probably be of a problem with illumination of local Push Buttons, then you would either need to replace the local Push buttons by a compatible type, or simply remove the illumination.

Disadvantage of this solution (with Shelly ahead of Latching relay) would be that you wouldn't know what state the light has, when looking at the App.

Once we know what you want, we might be able to provide more specific advices.