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48V.

Discussion in 'Power Electronics' started by Moro79, Nov 1, 2020.

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  1. Moro79

    Moro79

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    0
    Nov 1, 2020
    Hi guys
    Plz who can help me to know the difference between +48V and - 48V input power supply for instruments.
     
  2. Martaine2005

    Martaine2005

    2,968
    817
    May 12, 2015
    48V is usually known as phantom power. Found on audio mixers and professional mixing desks.

    But the difference you ask :
    One is positive and the other is negative.
    Can you elaborate on your question?

    Martin
     
  3. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    Technically, the difference is 96 volts.
     
    davenn and Martaine2005 like this.
  4. bertus

    bertus Moderator

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    439
    Nov 8, 2019
    Hello,

    The +48 Volts is 48 volts positive related to ground potential.
    The -48 Volts is 48 Volts negative related to ground potential.

    Bertus
     
    davenn likes this.
  5. Harald Kapp

    Harald Kapp Moderator Moderator

    10,591
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    Nov 17, 2011
    And then sometimes you will find a power supply input labeled "48 V" with a "+" on one input and a "-" on the second input. In this case the voltage is 48 V and the indicators are there to show you the correct polarity.
    As @Martaine2005 asked: please be more specific, show us photos of the input in question, if possible.
     
    (*steve*) likes this.
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