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Dual PSU wiring

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Duet Hardware and wiring
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  • undefined
    aniron
    last edited by 29 Jan 2021, 19:55

    Hi,

    I'm upgrading my printer (Duet 0.6 and 12V bed, heaters etc) with some TMC2209 silentstepsticks which I intend to run on 24V.

    Thus I need to wire up two PSU's.
    After failing a few times to design and print a partial enclosure for the mains end of my 12V PSU and a fused mains socket and switch, I got the openbuilds powercase and a meanwell 24V PSU to go with it.

    Now I'm wiring them together.

    Are there any immediately obvious errors or dangers in wiring them up like this?

    I noticed the powercase lacks a fuse unlike my previous mains socket. Would it be necessary to wire fuses between the N and L terminals and the mains socket? Max power draw for the PSU's are 3.4A and 4A.

    Should I tie V- to mains ground also on the 24v PSU or will I then get a ground loop? (Note I don't have mains ground in the socket right now, but don't want to get bitten in the ass by if when I move.) Should I instead just tie V- together between the PSU's?

    20210129_203643.jpg

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    • undefined
      Benny
      last edited by 29 Jan 2021, 21:21

      Try to get rid of crimps and keep single insulated cables down to a minimum, with mains cables.

      undefined 1 Reply Last reply 29 Jan 2021, 23:54 Reply Quote 0
      • undefined
        aniron @Benny
        last edited by 29 Jan 2021, 23:54

        @Benny I'm not using a bunch of crimps between the PSUs as shown, just to terminate the wires and attach them to the PSU terminals.

        Would tinned wire ends be better? Why?

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