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    Connect relay to Duet 2

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    Duet Hardware and wiring
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    • djthumaundefined
      djthuma
      last edited by

      Hello,

      I need to add a relay that will control the power to the external heated bed.

      I have sourced a 3-24V relay and Identified the cable to break.

      How do I go about connecting the relay to the motherboard expansion pins?
      https://duet3d.dozuki.com/Wiki/Duet_Wiring_Diagrams

      What code will enable / disable the switch?
      Do I configure it with M950 and trigger with M42?
      https://duet3d.dozuki.com/Wiki/M42

      Thank you

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      • Phaedruxundefined
        Phaedrux Moderator
        last edited by

        If you're just trying to control a bed heater, can you not just use the bed heater output and control it with normal bed heater commands?

        Perhaps I don't understand exactly what you're trying to do. Can you give more details?

        Z-Bot CoreXY Build | Thingiverse Profile

        djthumaundefined 1 Reply Last reply Reply Quote 0
        • djthumaundefined
          djthuma @Phaedrux
          last edited by

          @phaedrux
          For a modix big 60 machine,
          the bed heater is a separate switch and temperature controller because of the voltage input required.
          I am trying to cut power to the bed heater once a print finishes.
          My plan was to use a relay controlled from the expansion pins using the end gcode commands.

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          • Phaedruxundefined
            Phaedrux Moderator
            last edited by

            I see, so you are inserting the relay into the AC input for the bed heater controller and just want to be able to turn it on and off?

            What M950 and M42 command are you using?

            Z-Bot CoreXY Build | Thingiverse Profile

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