Server Power Supply Pinout

While dumpster diving the electronic scrap I find always interesting parts.

Last week I found some rack server with hot swap power supply. I removed the power supplies and reverse engineered the pinout of them.

On the following pictures you see the power supply and their pinout.

At the moment there are only the power and power-on pins known. The other unknown pins could be SPI or I2C for handling status information of the power supply or to regulate the cooling fan speed.

The power-on pins are often the shorter pins. They have to be shorter, because if the power supply is hot plugged, they should connect last after all other pins are already connected.

Power Supply Emerson 7001540-J000
+12V 40A
+5.1V 30A
3.36V STBY 0.45A

Pinout_Emerson_7001540-J000

Power Supply HP DPS-460EB A
+12V 38.3A
12V STBY 2.5A

Pinout_HP_DPS-460_HP_DSPS-750

Power Supply HP DPS-750RB A
+12V 62.5A
+12V STBY 2.5A

Pinout_HP_DPS-460_HP_DSPS-750

Power Supply Supermicro PWS-1K21P-1R
+12V 100A
+5V STBY 4A

Pinout_Supermicro_PWS-1K21P-1R