Nice RD400 Gate Automation

  • Hello guys, I'm wondering if i could use a Shelly uni for my gate opener. I'm a little confused; on knowledge base, it says UNI can support up to 24vac as output, but on product page/store it says 36vac. The voltage I need switched is 24~36vac peak. Can't I use it anyways since it will be switched for about 500ms?

    Einmal editiert, zuletzt von Nicco (27. März 2022 um 05:37)

  • At first, we have to discern between the supply voltage of the Shelly UNI (which must not be higher than 24V AC!) and the voltage the two outputs can handle: Both outputs are guarded against voltage spices by suppressor diodes (aka TVS diodes), which are activated at about 36 to 38 Volts (peak). Have a look at this (unfortunately in German language)

    thgoebel
    23. Juni 2021 um 17:21

    Thus, the planned application is critical: I may work - but there will be no guarantee…

    And, by the way: Please keep in mind that maximum current switched by the digital output is 100mA!

    Addendum #2: Welcome to the forum!

    „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)

  • Thanks! I did some testing and its voltage is 30vac, but of course, that won't remain constant. I think the UNI will work, maybe on a bad day, the diodes might conduct. I will take the risk. :)

  • LOL, I just remembered that I'm measuring Vrms; I Almost fried the uni. It's actually about ~50Vpeak :(

    Is it 36VAC (Vrms) or (Vpeak)?