A simple high quality 12Volt 100Amp Power Supply- Part1 - Page 253 - RC Groups
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Mar 05, 2017, 01:08 PM
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Yeah, always possible to use plugs off and on. But its much nicer to use switch, and of course commercial units like these would always have power switch.
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Mar 05, 2017, 01:23 PM
Use the 4S Luke
feathermerchant's Avatar
Not so. They are turned on by software.
Mar 05, 2017, 02:05 PM
I am a nice guy! Really!
I am turned on by software too! Sorry for the off topic post. I will send any objectors a wet noodle to lash me with.
Mar 08, 2017, 12:58 AM
Registered User
Don't know if this is the right place to ask this question, please point me in the right direction if not,thank you.
I have a couple of hp dps1200fb that have had the ground floated internally . I want to connect them in series and they will not be touching each other. Is having both p.s. grounds floated a problem. Any recommendations are appreciated. Wanted to check b4 I powered them up together.
Thanks again
Mar 08, 2017, 02:25 AM
Registered User
Originally Posted by mrforsyth
The cleanest method is to simply bend pins 4, 6 (short pin), and 10 into pin 8 and then feed solder.



Is this (the picture) the same powersupply as DPS-600PB ESP135? It says ESP135, but not the rest. So what I'm actually wondering is if Marks nice method would work on mine?

And I've also seen somwhere that connecting 3-9 with an 1k ohm would raise the voltage?

And if I'm on the wrong thread I'm sorry, please kick me in the right direction

EDIT: Nwm, I found ot I don't neet to connect pin 4 to 8 to quiet the fan on this, so its just 6-8-10
Last edited by Tomus; Mar 08, 2017 at 12:18 PM.
Mar 12, 2017, 01:20 PM
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How to start the power supply DCJ8452-01P REV: F.
CISCO ds-cac-845w
Mar 12, 2017, 04:57 PM
Registered User

does someone here accomplished to get a Dell 930P-00 to vary in output voltage ??
Mar 14, 2017, 08:31 PM
redwhskers's Avatar
I have a Dell NPS-350BB and can not find diagram for it . can someone help me. Thanks
Mar 26, 2017, 12:14 PM
Registered User
Originally Posted by aerobear
Here is how I did it. I'm sure there are other ways. Be warned that I am no expert on this stuff. Everything I know about power supplies I learned on this thread. Preceed at your own risk!!!

It would be a good idea to read this thread before proceeding. https://www.rcgroups.com/forums/show...1#post13992510

The black insulating sheath that goes between the case and the innards must be reused.

I only isolated the DC ground on one unit, not both. I also have a thin layer of plastic insulation between the cases just from a belt + suspenders mentality.
I have bumped up the voltage a bit over the expected 24V. Details later
Hi guys
I've bought 8 of these psu for making 4 psu at 24V.
One of these 8 psu doesn't go on. When i turn on it, the fan go on but the green led is always off and the Vout is 1V.
Have someone some ideas of the causes?

Mar 26, 2017, 02:11 PM
Registered User
Originally Posted by philcobt
Hi Guys

First post here.
Just my minor input after all the excellent info about power up connections which has helped me tremendously.

For HP 449838-001, 449840-002 or 486613-001 12v 62A, 750w PSU I have found the following connections powers it up. I believe it's used in a DL180/185 server.

I only have 'tested' it on a 50w load so I have no idea of stability under serious loads

The other two pictures show my connector used to test the PSU's as requested by a member and a (perhaps) clearer construction diagram.

Hope it helps

This pinout unit will also start up (50w test load) the HSTNS-PL29
I believe used in DLl360/DL360p Gen8 server and DL380/DL380p server.

Other HP part numbers:
(Revision 02)

Hello, i've got another PSU working:
PartNo: 506822-201
it's a 750 Watts powersupply capable of 62.5Amps on 12 V derived from HP DL-380 servers.
I've started it with the aid of Barry's diagram, added bonus is that the fan starts real quiet.
I used 1kOhm resistors.
I've hadnt had a chance to test it under real load to see if the fan would spin harder but for now with my use it behaves perfectly.
Mar 26, 2017, 11:16 PM
Use the 4S Luke
feathermerchant's Avatar
RE: 62A HP power supply
When it heats up the fan will speed up. I think there is a load bias too that spins the fan based on load. I sell these.
Mar 27, 2017, 06:12 PM
Registered User

Reverse-engineered the firmware in DSP-1200FB

Hey there,
If anyone's interested I reverse-engineered the CPU in the DPS-1200FB and figured out how to read all the internal status stuff (voltage+power in/out etc) over I2C (e.g. with a Raspberry Pi or whatever you prefer). Have not figured out how to turn the output on/off yet.

Python code here (and disassembly of the CPU firmware in the power supply etc)..
Mar 27, 2017, 07:27 PM
Registered User
Originally Posted by hendysw

i have a Dell A1570P-01 psu.
does anyone know the pinout to power up this psu?
i want to use it stand alone, not for computer.

I also need this so any help would be highly appreciated. Thanks in advance
Apr 02, 2017, 12:22 PM
Registered User
Originally Posted by mgaproduction
Hi guys
I've bought 8 of these psu for making 4 psu at 24V.
One of these 8 psu doesn't go on. When i turn on it, the fan go on but the green led is always off and the Vout is 1V.
Have someone some ideas of the causes?

Hi, nobody have ideas about it?
The PSU are the HP DPS-1200FB

Apr 02, 2017, 01:23 PM
RobbeUK & Midland Helicopters
Originally Posted by mgaproduction
Hi, nobody have ideas about it?
The PSU are the HP DPS-1200FB

Hey buddy.

Put simply that unit is DOA, these units are so compact you have to partially destroy them to get to any of the critical parts.
Even then fixing an issue is next to impossible and at their price, it's cheaper (and safer) to replace than attempt a repair.

Ian Contessa

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