Pinout help - Telecom power supply

Discussion in 'Electronics Resources' started by kid_rock, Dec 21, 2013.

  1. kid_rock

    Thread Starter New Member

    Dec 21, 2013
    3
    0
    Hi!

    I got access to a Nortel/Cherokee Europe 48v, 600w DC power supply (PE2114/26)

    Would anyone be able to point me in the right direction for the connection diagram?

    Here is the back - it's a 16*3 connector
    [​IMG]
     
    Last edited: Dec 21, 2013
  2. paulktreg

    Distinguished Member

    Jun 2, 2008
    611
    120
    Take a look at the printed circuit board. It's a single rail so shouldn't be too difficult to work out?
     
  3. Kermit2

    AAC Fanatic!

    Feb 5, 2010
    3,775
    931
    I am sure you will find that the 48 volt output is available on several pins, and the ground will be also. The unit is putting out over 10 amps. One small connector pin would not be used to carry such a large current load.
     
  4. kid_rock

    Thread Starter New Member

    Dec 21, 2013
    3
    0
    Yep, was hoping someone had some experience before I went poking around inside it!
     
  5. Kermit2

    AAC Fanatic!

    Feb 5, 2010
    3,775
    931
    DO NOT POWER ON the unit while examining the circuit board. You are merely going to observe the copper traces and try to determine what pins are outputs(ground or voltage). The traces should be large and should be connected to a plurality of pins. They should also be connected to a leg of a large transistor(or other output device) which will surely be attached to a substantial sized heat sink.

    When you have mapped these pins and determined their physical position within the connector body, re-assemble the unit and using a multi-meter, probe the pins 'carefully' to find which ones are ground and which are voltage. Be aware that most telecom equipment operates on a NEGATIVE 48 volt power supply.
     
    kid_rock likes this.
  6. kid_rock

    Thread Starter New Member

    Dec 21, 2013
    3
    0
    I opened it up and had a look see, you are right..
    Ground is connected to 3 pins in each row, similar for live and neutral.

    Out put is on 6 pins for +ve and 6 pins for -ve.
     
  7. TvD

    New Member

    Feb 19, 2014
    1
    0
    I have two the same power supply, one is working fine When connected to
    I only connected AC between rows 28 and 24 and a load between rows 8, 6 (positive out) and rows 4, 2 ( negative out) to the output
    Unfortunate, the other briefly starts up, and then go's down. I'll have to investigate that one further.
     
    Last edited: Feb 19, 2014
Loading...