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Sun Fire V890 psu Pinout

3,3V 5V 12V 48V 5VSB
36A 28A 17.5A 25A 1,3A

( Totals to 1.6 kW )

OFF B1 Pins x1 x2 x3 x4 x5 x6 A1
y1 0 GND 0 4.8 0 6.05
0 0 0 0 GND y2 4.93 0 GND 0 0.03 0 GND GND 0
y3 GND 0 4.84 GND 5.11 5.11
y4 0 0 0.06 0.7 GND 0

To start the Power Supply shorten Pins x4y1 to GND and x3y3 to GND.

ON B1 Pins x1 x2 x3 x4 x5 x6 A1
y1 0 GND 0 0 0 6.05
12.1 5.1 3.4 3.4 GND y2 4.93 0 GND 0 0.03 0 GND GND 48.1
y3 GND 3.37 0 GND 5.11 5.11
y4 0 0.15 0.06 0.7 GND 5.14

Reprap Ramps

Example connection of the Powersupply to a Reprap Ramps Shield v1.4

  • x3y3 -> Ramps PS-ON
  • x4y3 -> x3y1
  • x5y3 -> Ramps VCC
  • x6y3 -> Ramps 5V

V880 Notes:

I suspect (!) the Pinout for the v880's and v890's power supplies to be generally the same with the minor difference of 15 instead of 25 Amps at the 48 Volt pin. (Which makes no big difference if you intend to power your Peprap Printer with it). But it is substantially cheaper, you can get a v880 psu for ~ 20 Euro from Ebay.

Please drop me a line if you can verify that the pinout is indeed the same.