Query on 24V supply

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  • jinu_j
    Senior Member
    • Feb 2016
    • 90
    • India
    #1

    Query on 24V supply

    Hi Folks

    have a basic question on Fundamentals. I have a Power supply that has the following terminals +12V, 0V and -12V. Now normally i can get 12V by connecting between 0 and 12 and -12V by connecting load between 0 and -12V. I can also get 24V by connecting load between -12V and +12V.

    Now my queries

    1. Is the 24V i get by connecting load between -12V and +12V same as connecting the load between a 0V and 24V power supply. Is there anything to take care of when using one source against the other ?

    2. Now assuming there are 5A fuses between 0V and -12V and also between 0 and 12V. Now when i connect the load between -12V and 12V, would these fuses come into play?

    Thanks
    Tags: None
    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 30915
      • Albion
      #2
      Re: Query on 24V supply

      is the + and - rated for the same current?

        Comment

        • jinu_j
          Senior Member
          • Feb 2016
          • 90
          • India
          #3
          Re: Query on 24V supply

          Originally posted by stj
          is the + and - rated for the same current?
          Yes they are rated for the same current 5A

            Comment

            • stj
              Great Sage 齊天大聖
              • Dec 2009
              • 30915
              • Albion
              #4
              Re: Query on 24V supply

              then you can get 24v, but you cant connect the psu to anything earthed

                Comment

                • jinu_j
                  Senior Member
                  • Feb 2016
                  • 90
                  • India
                  #5
                  Re: Query on 24V supply

                  can i use this voltage/source on components that have specified range of 0-24V. For eg: if i am using an IC whose VCC pin range is 0-30V can i use this power source ?

                    Comment

                    • stj
                      Great Sage 齊天大聖
                      • Dec 2009
                      • 30915
                      • Albion
                      #6
                      Re: Query on 24V supply

                      yes, but as i said - no part of your circuit can connect the 0v(GND) rail to mains ground.

                      not unless you modify the psu first.

                        Comment

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