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    PS_on switching a SSR

    Duet Hardware and wiring
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    • windiesel
      windiesel last edited by

      Hallo,

      I use two normal Meanwell Power supply. One for 24V and one for 5V.
      I made a quick conection plan but i am not sure if it works, could you please check it.

      ziemlich groß -> pretty high value
      Netzteil -> powersupply

      is there a possiblity to switch the SSR direktly?

      best regarts
      Kevin

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      • dc42
        dc42 administrators last edited by

        Yes just connect the SSR control terminals between +5V and PS_ON.

        Duet WiFi hardware designer and firmware engineer
        Please do not ask me for Duet support via PM or email, use the forum
        http://www.escher3d.com, https://miscsolutions.wordpress.com

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        • windiesel
          windiesel last edited by

          notice:
          you need a varistor over the SSR when its swichting an inductive Load.

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          • Flyer007
            Flyer007 last edited by

            What about mechanical relay like this one? https://www.amazon.com/gp/product/B00E0NTPP4/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1

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            • dc42
              dc42 administrators last edited by

              Switching PSUs are not significantly inductive so do not require a varistor.

              If you use a mechanical relay instead of an SSR, you must connect a flyback diode in parallel with the relay coil, otherwise you may damage the PS_ON output.

              Duet WiFi hardware designer and firmware engineer
              Please do not ask me for Duet support via PM or email, use the forum
              http://www.escher3d.com, https://miscsolutions.wordpress.com

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              • Flyer007
                Flyer007 last edited by

                So this looks good to go then?

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                • dc42
                  dc42 administrators last edited by

                  You can connect VCC of that relay module to +5V and IN1 to PS_ON.

                  Duet WiFi hardware designer and firmware engineer
                  Please do not ask me for Duet support via PM or email, use the forum
                  http://www.escher3d.com, https://miscsolutions.wordpress.com

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                  • Flyer007
                    Flyer007 last edited by

                    @dc42:

                    You can connect VCC of that relay module to +5V and IN1 to PS_ON.

                    Thanks! Thats what I thought. Should I gnd it to Duet WiFi also?

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                    • dc42
                      dc42 administrators last edited by

                      You will need to power the relay board from +5V (or 12V, or whatever voltage it needs) and ground too. I presume that's what J5 is for, although the schematic for that part doesn't make sense.

                      Duet WiFi hardware designer and firmware engineer
                      Please do not ask me for Duet support via PM or email, use the forum
                      http://www.escher3d.com, https://miscsolutions.wordpress.com

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