Shelly pro 1 for push circuit on 24v ac?

    Hi,

    I'm looking for some help with a situation that I seemingly can't get a clear answer for, my current setup is attached.

    I have a 24 v AC transfo that powers a push button circuit around the house that goes to teleruptor (impulse?) relais (24v ac), these relays then power the lights on 230v AC.

    I want to make each of these 5 light circuits smart by changing them to Shelly's on the DIN rail. Since the wiring in the walls is very thin I can't push 230v AC over these and it will have to stay on 24v AC. I noticed the Shelly Pro 1 din modules have dry contacts.

    I raised a ticket in which I supplied a drawing (see attached), which they said would work, but some work-buddies told me that this won't work.

    I know basics but this is going over my head.

    Much appreciated.

    Your buddies are right: Supplying a Shelly pro 1 with 24V AC will not work! The magic word is AC - with DC, you’ll have success. Thus, you’ll have to swap the transformer for a DC power supply like this one:

    MEAN WELL Netzteil 12W 5V 2,4A ; MeanWell HDR-15-5 ; DIN-Rail Trafo, Schwarz
    Schlankes Hutschinennetzteil 12W 5V
    smile.amazon.de

    This power supply shall be able to feed 5 Shelly pro 1 (which will need 100mA each maximum). You may oversize the power supply as you may believe - there are more powerful types offered…

    „Habt Geduld. Alle Dinge sind schwierig, bevor sie einfach werden!“ (aus Frankreich)

    „Nothing in life is to be feared, it is only to be understood.“ (Marie Curie, 1867-1934)

    „Es reicht nicht“, rief Schiller, „Gedankenfreiheit zu fordern, man muß auch denken können, sonst fordert man Gedankenlosigkeitsfreiheit und die ist die Freiheit zur Dummheit, welche wiederum die schlimmste Unfreiheit überhaupt ist!“
    (Aus „Besuch aus Weimar“ von Gert Heidenreich, Schriftsteller, *1944 in Eberswalde)

    Hm yes but since its a dry contact relais cant I power it on 230v ac and signal the switch on 24v ac.

    There are other things connected on the 24v ac transfo and no room left in the cabinet.

    Much appreciated for any tips

    I‘m afraid - but this doesn’t work! You need low voltage switching due to the wires. Hence, the Shellies must be powered unconditionally with low voltage.

    „Habt Geduld. Alle Dinge sind schwierig, bevor sie einfach werden!“ (aus Frankreich)

    „Nothing in life is to be feared, it is only to be understood.“ (Marie Curie, 1867-1934)

    „Es reicht nicht“, rief Schiller, „Gedankenfreiheit zu fordern, man muß auch denken können, sonst fordert man Gedankenlosigkeitsfreiheit und die ist die Freiheit zur Dummheit, welche wiederum die schlimmste Unfreiheit überhaupt ist!“
    (Aus „Besuch aus Weimar“ von Gert Heidenreich, Schriftsteller, *1944 in Eberswalde)

    Einmal editiert, zuletzt von thgoebel (8. August 2022 um 21:14)

    So other than removing the entire push button circuit and using battery powered switches to toggle 230v ac shelly's wirelessly there is no option in the shelly range it seems?

    I'm trying to think of the best option cause I really want Shelly to do this, I have Tuya din mounts relays that can do this but I really don't wanna hook my house up to their cloud.

    Much appreciated for all the info!

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