ATX, WTX and other standard and proprietary power supply (PSU) cables connectors pinouts  > HP pinouts
3W3 Sub-D connector for high-current applications

 

Pin
Number
Pin
Name
Description Gender
@ PSU
Gender
@ Cable
1 0V Supply return M F
2 GND Ground F M
3 -48V 48 volt negative supply M F

If you only have 2 power cables at your disposal, and you're sure that you're dealing with a positive ground system; you can just make a short between pins 1 and 2.

The connector is a high-power version of the 15-pin Sub-D housing. It can be found at all major component suppliers; do a search for "3W3", and you'll probably end up with plenty of results. Some manufacturers sell these as complete connectors, other (FC T) offer empty shells where you can add male or female connector pins.

3 pin Sub-D 3W3 male connector layout
3 pin Sub-D 3W3 male connector
at the PSU
3 pin Sub-D 3W3 female connector layout
3 pin Sub-D 3W3 female connector
at the cable
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HP Proliant servers -48V DC Power inlet visual pinout:
HP Proliant servers -48V DC Power inlet diagram
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