|
|
|
Thread OP
|
Mini-HowTo
Dell Server PSU - Model NPS330BB A
Hi All,
I got a hold of this PSU and couldn't find a how to on getting this supply modded for charger duties.. Anyhow, after some tinkering I Figured out how to do it. ![]() It's pretty simple.. In this picture you can see the red/yellow leads soldered to the board. That is the switched lead (for those that converted PC power supplies it's like the green wire). However, I'd only get the supply to light up for a moment. Putting a small light bulb on the 5V side kept it powered up. After seeing the voltage drop to 11.4 w/ a 11-12A load, I decided to check and see if there was an adjustment pot. Found them both, and now with 11A I only drop to 11.9V. The pots used are behind the fan on the edge connector side of the PSU. There are two pots on the left, and one on the right. The ones to use are the upper one of the pair on the left, and the one on the right. Turning them both to full stop to the left gave me a 12.4V idle voltage and as stated above 11.9v @ 11amp. Hope this helps others who can get this supply nice and cheap. ![]() EDIT: The two leads used to power the unit on incorrect in my photo. The lead on the far left (red wire) just needs to be grounded. After doing that, the supply throws down over 12A with out flinching (Steady 12.4-12.3v, before fixing the wiring it dropped to 11.9) I'll upload new pics of my supply once I finish the rest of the mods. |
|
Last edited by PhotoGreg; Feb 04, 2011 at 11:28 PM.
Reason: change for wiring..
|
|
|
|
Thread OP
|
btw: These are going for about 20 bucks on ebay.
What I like about it, is that it's nice and compact and pretty steady under load. http://shop.ebay.com/?_from=R40&_trk...All-Categories |
|
|
|
||
|
Quote:
|
|
|
Last edited by madatme; Feb 06, 2011 at 02:06 PM.
Reason: add-on
|
|
|
|
Thread OP
|
|
|
|
|
||
|
Quote:
Update on how it works-the fans run slow and quiet, charged a 5s 3600 at wide open throttle and the voltage stayed close to 11.9-12v, the ps only got warm, temp gun says 95deg at the power resistor outside the case, did this for several batterys, so with 4 ps runnning at the same time there was not much noise at all-very happy with the results glad to be of help and Thanks again Greg B |
|
|
Last edited by madatme; Feb 26, 2011 at 07:30 AM.
Reason: update
|
|
|
|
|
i have a couple of NPS-330AB power supplies i would part with for 100.00 shipped lower 48, they are unmodded. i was going to post tehm in the fs section but cant find the correct area as to where they should go
![]() |
|
|
|
|
|
Too hot?
If your running the PSU in a small space, add the 5 volt line to pin 5
Diagram1{ |1|2|3|4|5| 6 | 7 | GROUND8 | 9 |5 Volt10|11|12| } The single pin next to the 12 volt line. is the fan "switch" Can anyone identify the functions of 1,2,4,5,9,11 and 12 (number system is as defined in Diagram 1) |
|
|
|
|
|
Okay, bumping up an old thread, but I just scored a couple of thes PS. Where does the 10Ω10W resistor tap into? one end is grounded, the other end goes to what pad on the output tabs?
Thanks, Jon |
|
|
Thread Tools | |
Similar Threads | |||||
Category | Thread | Thread Starter | Forum | Replies | Last Post |
Discussion | Converting PSU AcBel model FS7023 and FS9032 | pluto_26 | Power Systems | 4 | Oct 17, 2016 08:13 AM |
Discussion | IBM server PSU for dc supply | freakystyley | Batteries and Chargers | 2 | Jul 18, 2011 09:40 AM |
Idea | Please Help! Modding 12VDC 32Amp Server PSU | RockDragon | DIY Electronics | 6 | Jun 04, 2011 08:03 PM |
Discussion | Dell Server PSU for charging? | tonkajeep34 | Batteries and Chargers | 3 | May 21, 2010 11:03 PM |
Discussion | Dell Server Power Supply | Red Scholefield | Batteries and Chargers | 18 | Aug 26, 2007 04:06 PM |