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Apr 12, 2005, 12:56 AM
Registered User
RockDragon's Avatar
Thread OP

Please Help! Modding 12VDC 32Amp Server PSU

I already posted this in Batteries and Chargers but I think that there will be more helping from here.

I have this hp PS-3381-1C1 hot-Plug Server PSU that has up to 32 Amp of the +12VDC output. I need to know the output pin details.
Would anyone know how I can modify this PSU? Please HELP!

It's hp PS-3381-1C1 ... Part No. 194989-002 ... Spare No. 313299-001

Top side output

Bottom side output

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Apr 12, 2005, 05:29 PM
York Electronics
Gary Warner's Avatar
Have you tried measuring with a meter?

My guess is that the PS has a controlled output. You might need to identify the on/off control pin(s).

Apr 12, 2005, 05:44 PM
Right Honorable Member
flatfour's Avatar
This one could be tricky. That PS is from a ProLiant DL380 server. The power supply is able to communicate its load % to the motherboard. If I get a chance, I will plug one in and see what comes out. I am pretty sure they are logic controlled
Apr 13, 2005, 01:06 AM
Registered User
RockDragon's Avatar
Thread OP
Thanks for both of you.
So far I've searched and not found any information at all for this PS on the Web. Seem like no one ever discuss about it. And I don't have a motherboard that I could plug it in and be able to check the output.
Until now I've known the +12V and +5V outputs as I could identify from the very thick tracks on the board. I think the only one more thing I need is the PWR-ON pin(s) or the on/off control pin(s).
If someone would know or have any info about this unit, please!
Apr 13, 2005, 02:34 AM
Registered User
RockDragon's Avatar
Thread OP

more photos

I got some internal photos here.

I've seen the marks on the board that the socket connector is 44 pin type.
(22 marks on each sides)
Center is +12V, Left and Right are 0V

Thick Pad a bit to the right is +5V, again, Left and Right are 0V

Well! now I need to find out the on/off control pin(s).
Hopefully someone would come up with it.
Jun 02, 2011, 09:22 PM
Registered User

pin setting


Did you found the solution for your problem?? to find the right pin settings to switch the ps ON??? i have the same problem. i Also want to use this PS to charge my battery's with.

Thank you.

Jun 04, 2011, 08:03 PM
Registered User
I think this looks like it...

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