Duet 0.8.5 Wiring ATX Power Supply



  • I have a 600w ATX power supply (EVGA 600B) with the following specs
    +5V@20A, +3.3V@24A, +12V@49A, -12V@0.3A, +5VSB@3

    I would like to use this to power the duet but have a few questions first.

    1. Will this Psu work?
    2. The 5v standby, ps-on and a ground lead from the ATX PSU to the external 5v connector next to main power in?
    3. The main 12v power in, how many 12v leads (yellow wires from PSU) should / can I bunch together for the + terminal in a terminal block?
    4. For the - terminal on the main power input, should I use the ground wires from the PSU or the single -12v lead on the PSU? Does it matter? If I use ground can / should I bunch a few together in a terminal block?
    5. Do I need to keep any additional spare 12v leads and ground for future expansion?

    Thanks for any help you can provide



  • 1.) Yes, though it might possibly need a load on the 5v rail to hold steads 12v.
    2.) Yes
    3.) As many will fit in the provided ferrule.
    4.) Use the ground wire. -12v is 12 volts below ground reference. If you used +12v and -12v you'd get 24v, but -12v is only rated for 0.3A.
    5.) If you want to, sure. I'd probably coil them up next ot the power supply with heatshrink on the ends.



  • @elmoret:

    1.) Yes, though it might possibly need a load on the 5v rail to hold steads 12v.
    2.) Yes
    3.) As many will fit in the provided ferrule.
    4.) Use the ground wire. -12v is 12 volts below ground reference. If you used +12v and -12v you'd get 24v, but -12v is only rated for 0.3A.
    5.) If you want to, sure. I'd probably coil them up next ot the power supply with heatshrink on the ends.

    Thanks for the info…..I connected the PS sense line to the lead it was coupled with in the ATX connector.

    Exactly there info I was looking for...Thanks


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