3 wire fan pin out?

[macuserman]

Ok so I have an orange micro card and the fan was unplugged when I got it.

The board is nicely labeled 12 and 5v however the wire colors on the fan just don’t seem to match up. Am I missing something? Could it be an unoriginal fan?

 

[macuserman]

This is the fan it has: https://www.pchub.com/panaflo-matsushita-fbe05k12u-server-square-fan-fbe05k12u-2cx-p213899

I was thinking that red was 12v and black was gnd leaving the yellow for 5v line but the connector is not wired that way at all.

 

[NJRoadfan]

Ground - Black
12V - Red
Tach/Sense (RPM readout signal for monitoring) - Yellow

The fan is using a standard PC CPU fan header. The card? Well I have no clue what it is laid out for. I would probe the pins for voltage. Looking at photos of other OrangePCi cards, they leave the sense pin hanging, and just have the 12V and Ground plugged in. So reverse the orientation so the black wire is plugged into the middle pin and the red wire is on the 12v pin. Yellow wire hangs out doing nothing.

Looks like OrangeMicro did this for flexibility in fan suppliers. Some of their boards have 5v fans on them.

EDIT: https://68kmla.org/bb/index.php?threads/orangepc-660-installation-attempt.6410/

Someone here has a 660 and it looks like that fan has a plug with no sense wire.

 

[Phipli]

I agree with @NJRoadfan.

Use a pin to pop out the pins from the fans plug. Put black in the middle, align red with 12v and leave yellow unplugged. Wrap yellow in some heatshrink to stop it shorting, or cut it off once you're happy.