Sorry for crossposting this, but I've had no answers from the more specific groups.
I'm in the process repurposing a power supply from a scrapped Sun Microsyst ems StorEdge D2 array which was working perfectly well when decomissioned.
It is a Japanese made 360W FDK PEX737-40, +5V/30A and +12V/23A. Impressively well built hardware and in mint condition.
The final objective is to have a PS with solid +12 and +5 outputs which may eventually power USB charging ports and other assorted stuff needing quali ty power.
The plug at the back of the slide-in box/canister has 24 pins just like the typical male Molex 39-01-2240 connector for ATX MBs but with a different p inout and keying(?) and without all the usual ATX voltages, which makes sen se as it is not a for a motherboard.
Of the 24 pins, 19 have 18AWG and 5 have 24AWG cables.
With the unit plugged in and the rear switch 'on', I get these readings:18AWG-red -> 0.00V to GND 24AWG-red -> 3.0mV to GND 18AWG-orange -> 0.00V to GND 18AWG-yellow -> 0.00V to GND 24AWG-green -> 0.00V to GND 24AWG-grey -> 0.00V to GND 24AWG-blue -> + 5.08V to GND + 3.0mV to GND
This would make the blue cable PS_ON but the unit will not latch_on when I short it to GND and although there's no continuity between the green cable and GND, the unit does latch_on when I short blue+green.
The five +5V cables are on the same rail as they show 0.1 ohms between them , same for the three +12V cables.
The remaining red cable shows 10.2 ohms to the other +5V cables.
The yellow +12V cable shows 3.80k ohms with respect to the other +12V cable s and is probably destined to one of the two redundant fans the array had.
With the unit plugged in, the rear switch 'on' and green+blue shorted, the unit latches_on and I get these readings:18AWG-red -> + 5.11V to GND 24AWG-red -> + 5.10V to GND 18AWG-orange -> +12.29V to GND 18AWG-yellow -> +12.01V to GND 24AWG-green -> + 5.07V to GND + 5.06V to GND + 5.10V to GND + 5.10V to GND
So my guess is that the blue cable is PS_ON, the grey cable is PWR_OK and t he green cable GND (?).
What I would need to know is this:
The 24AWG-red cable has no voltage when the unit is not latched_on, so it d oes not seem to be +5VSB: what is it for?
What would be the proper use of the brown cable? Is it a sense cable like every other ATX PS?
Do I need to put in a dummy load (10 ohm/5w sandbar resistor) to insure sta bility?
I'd be grateful for any input on this.
Thanks in advance.