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Old Mar 10, 2011, 11:23 PM
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California
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Converting Dell ASTN 7000245 PS?

Hi,

After seeing so many here had great success in converting their server power supply, I decided to give it try. Off to eBay and found my self a pair of Dell ASTN 7000245. They are OEM for Dell 6650 server, and it's capable of deliver 72A on 12v rail alone. That gotta be enough for all the chargers I have plus a few of my flying buddys'

However, after two night of probing, I still haven't not found a way to power up the power supply. Searching the Google for spec. for the power supply and Dell 6650 did not return with any useful information. It's a long shot, but I figure I should ask if someone here in RCG already found the secret combination to bring this power supply to life.

Attached are a picture of the power supply label and connecting pin. AC power is connect at the end of the power supply using server style cable. When power supply is connected to the AC, one of the fan would start, but no voltage is detect on any of the output connectors. Some of the small control pin does shows 5.12v, 4.70v, 1.90v. This is measured against large connectors as ground. Since measuring using the case as ground appears does not produce consisting reading.

Anyway, any help would be greatly appropriated.

B
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Old Mar 11, 2011, 01:48 PM
Steven
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United States, CT, East Hartford
Joined May 2010
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Converted Dell ASTN 7000245 Poweredge 6650 PS?

Hello. I've been doing these type of mods for years and have a fool proof method for finding the right pins. Anyways, i've included a photo with the right pin combination for your Dell ASTN 7000245 Poweredge 6650 PS. Just connect the 3 pins in red together. The 2 outer red pins are the ones that need to be shorted to ground. The center red pin happens to be ground. So just connect them together. I've also included the voltages. I get around 72 amps out of this supply.
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Old Mar 11, 2011, 01:58 PM
Southern Pride
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Haralson County GA. USA
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Quote:
I've been doing these type of mods for years and have a fool proof method for finding the right pins.
very interesting, care to share your method?
Quote:
Just connect the 3 pins in red together. Basically you are grounding the 2 outer pins to the center ground pin.
There seems to be 4 pin in each column so question is how can the three lower pins be considered



Quote:
the 2 outer pins to the center ground pin
Charles
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Old Mar 11, 2011, 02:06 PM
Steven
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United States, CT, East Hartford
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What do you mean by "considered"?
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Old Mar 11, 2011, 02:16 PM
Southern Pride
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Haralson County GA. USA
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There are 4 pins ,correct? So how can 3 pins be considered (described as) as being the two outer pins and the center ground?


1 outer
2
3
4 outer


attachement appears to be

1 no contact

2 connected (shorted) together
3 connected (shorted) together
4 connected (shorted) together
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Old Mar 11, 2011, 02:20 PM
Steven
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United States, CT, East Hartford
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Oh! Sorry. The 2 outer red pins are the ones that need to be shorted to ground. The center red pin happens to be ground. So just connect the 3 together.
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Old Mar 11, 2011, 02:39 PM
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California
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Thanks!! that worked!!

By the way, did you have to load the 3.3v rail to get full 72A output on the 12v rail?

In any case, I sure would like to know about your "fool proof" method of find the right activation pins.

Thanks again!!

B
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Old Mar 13, 2011, 02:09 PM
Steven
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There is no need to load up the 3.3 volt rail to get the full rated output on the 12V.
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Old Mar 13, 2011, 03:29 PM
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Thanks!!

One thing I have found that's some what of interest to those whom are want to build 24v power supply using 7000245 is, the chassis of 7000245 appears to be not connected to the 12v negative ground. I'm thinking I may be able to make the 24v conversion without lifting the ground wire on the AC side. Comments?

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Old Mar 13, 2011, 04:33 PM
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If DC return and chassis ground are indeed isolated, then yes, it is totally possible to connect two in series for 24V.

When you say 'appears to be not connected', did you verify with a multimeter? Just a little concerned how the work 'appears' crept into the statement. It is either connected or not connected. There should be no in-between and it's very easy to verify.

Mark
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Old Mar 13, 2011, 05:07 PM
Steven
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United States, CT, East Hartford
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Yup. The DC return and chassis are totally isolated. No reading even in the Megaohm range. And the case is indeed connected to earth ground.
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Old Mar 14, 2011, 03:33 AM
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Quote:
Originally Posted by mrforsyth View Post
did you verify with a multimeter? Just a little concerned how the work 'appears' crept into the statement. It is either connected or not connected. There should be no in-between and it's very easy to verify.
I apologize for the confusion.

I did verified with a multi-meter, in both pin-activated and none-activated mode. However was surprised to see neither shown any continuity. Thanks for confirming the finding.

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Old Mar 17, 2011, 07:23 PM
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Camas, Washington, USA
Joined Apr 2001
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power cord question

I picked up one of these from ebay, came with no power cord. Has a strange connector for AC input, what are you guys using? The cord is available on ebay... cost's more than the PS. Maybe just solder a cord directly to the terminals? From the left... neutral- ground- line? Looks like it could be powered off of 110 or 220?
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Old Mar 17, 2011, 08:04 PM
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California
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Those are the server power cord for 110v. Since I didn't have one handy, I got three spade crimp connect and expended them a little to fit each contact on the 110v side. It's not a permanent solution, but it works for now.

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Old Mar 18, 2011, 11:51 AM
Steven
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United States, CT, East Hartford
Joined May 2010
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I've also used female spade crimp connectors for the 6650 PSU. Soldering is a more permanent solution. Or you could buy an IEC 320 C19 plug to put on the end of a power cord.
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