Pin Number |
Pin Name |
Description | Wire color (usual) |
1 | +12v | Fan Power | Green mark |
2 | Signal | White mark | |
3 | GND | Ground | non marked |
4 | PWM | +5v (on/off control) The Rpm Fan control can do with a normal fan bus. While it can be driven by a 5 volt digital PWM signal, it is, in fact, an analog fan speed control signal. 0 volts = off, 5 volts = 100%, 2.5 volts = 50%, ... |
inside delta fan (behind label), red mark |