|Mar 14, 2015, 08:08 AM|
1400w ac power supply awf-11dc-1400 s-l4 ibm 39j2779
My turn to share with the community
I got this IBM PSU: AWF-11DC-1400 with really sexy specs!
but no information on pinout
I followed the method
and I found out the required pins among 58 pins!
Here is the result: really simple!
only one pin to short to ground!
I have a question for the bosses around here:
- the number of outputs don't exactly match the specs? it's weird. Are the 3 12V outputs separated? or can I link them together?
- any hints on how to increase the voltage of 10%?
|Mar 14, 2015, 10:41 AM|
|Mar 14, 2015, 04:04 PM|
|Mar 14, 2015, 10:45 PM|
Please post a link to your thread in the "How to convert Server Power Supplies" thread.
|Mar 15, 2015, 02:16 AM|
This is pure guesswork but I'm wondering if the "Output" numbers on the label refer to connections on the backplane connector not the supply itself?? Some of the low current outputs may come from the small pins as in other supplies while there are multiple large blades for the high current voltages.
My first wild totally uninformed guess would be that you will get the 12V, 90A output from the two outer longer blades (ground) and the two left hand short ones. The two faced blades and the inner ground blades are possibly for the other voltages. Grounds are possibly common (easily checked), the equal voltage blades may not be. In other big supplies they are sometimes separate and separately protected.
By the way the full description of this supply appears to be:
IBM 39J2779 1400W AC POWER SUPPLY AWF-11DC-1400 S-L4
|Mar 15, 2015, 04:56 AM|
BTW, here's the logic around my wild guess.
1) On other supplies the big blades carry the heavy current rails and the smaller pins some of the light duty ones.
2) This supply seems to have two sets of small 0.1" header pins. It would seem logical that the 8 located between the large blades carry power and the big 2 x 25 row at the bottom is all logic and sensing.
The top 8 are probably the twin pins for 5V 2.7A and VFan and VBlower plus a common ground . The last two probably switched DC hence the resistance readings.
That leaves the blades. Blades without twin faces will be for the heaviest currents. There are 4 grounds so that leaves 4 blades without twin faces (which matches the number of grounds).
Two are 12V nominal, one is 3.3 nominal and one is 5V nominal. All fits with the high current ones on the nameplate.
The remainder double faced blades could be
12.0VL and its ground
2.5V and its ground
Not sure what the -3.5V is??? (Possibly VBlower and there are 4 small pins for VFan.)
1.8V and its ground
-12V and its ground
3.3VCS and its ground
This is all pure guesswork but I am pretty sure you can consider only the non double faced blades for very high current so that is really all you need to deal with. And they are straightforward.
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