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Unite 0V outputs from different power supplies

Discussion in 'Electronic Basics' started by Haritztolete, Jan 18, 2006.

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  1. Haritztolete

    Haritztolete Guest

    Hello

    We are making some changes in an installation, and there are some
    machines, everyone with its power supplies, +24VDC and +5VDC. I would
    like to unit the 0V signal of all the power supplies in order to use
    any power supply present in the installation. Is it enough to unit
    physically all the 0V outtputs? Can I have any problem doing it?
     
  2. Dan Hollands

    Dan Hollands Guest

    In general it doesn't sound like a good idea but you didn't provide enough
    info

    How much power, how would the power supply from one machine power another.
    You can NOT just ties the +24v and +5v from each machine together. What is
    being powered - electronics of some kind presumably. What kind of distances
    are involved.
    Why do you want to do this?

    Dan
    --
    Dan Hollands
    1120 S Creek Dr
    Webster NY 14580
    585-872-2606

    www.QuickScoreRace.com
     
  3. Jan Wagner

    Jan Wagner Guest

    Haritztolete kirjoitti:
    Very generally speaking, yes, it is possible to use a common 0V
    (ground/GND) for devices and some supplies. For a common ground you
    might use heavy copper braid or copper bus bars.

    If it actually is a good idea depends on your setup.

    Paralleling the outputs of the PSUs (+24's together etc) however is
    rarely a good idea.
    Potentially, lots of :) But it depends on PSU type, what power levels
    we're talking about (machines & PSUs), distance, stationary or moving,
    is there (non-balanced or non-isolated) signalling between the machines,
    etc.

    - Jan
     
  4. Jasen Betts

    Jasen Betts Guest

    If the 0v outputs are already connected to the protective ground then there
    will be no harm caused.

    If not you could have short cuircuits, ground loops, and all sorts of
    problems appear with this setup.


    Bye.
    Jasen
     
  5. Generally, avoid this. It can cause problems. If you really MUST do it, get
    someone who is skilled at solving problems with paralleling and with ground
    loops to assist you.
     
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