3 Wire Pc Fan Wiring Diagram

Proper fan connector placement is shown in the figures below.

3 wire pc fan wiring diagram. Of course all you need is the red and black wire to run your computer fan but if you didn t know what the extra wires are for this video may help you out. Connect the blue wire to the red wire. Some condenser fan motors wire to a circuit board while others use proprietary plugs for their connectors. The circuit in the fan detects when the magnet in the motor passes a sensor and each time it pulls the sense wire to 0v.

Hvac condenser fan motor wiring diagram. Thus instead of using the colors to distinguish the function better try to study the internal wiring connection. To do this method the wire from your wall circuit to your light has to have 3 wires. If you connect a 10k resistor between this wire and 5v the wire will be at 5v when the magnet is not detected so you see a square wave.

If the connector fits the pins it ll work and you don t have to worry about the pin arrangement. Yes 2 or 3 wire fans can be controlled using basic pwm. Fan power and ground. Connect white wires together.

This is ac power and not a dual capacitor so the terminal side does not matter black wire from the condenser fan motor to other side of power on the contactor t2. Here s the 3 wire method. Split the incoming hot wire into a y and connect it to a terminal on each switch. However two fans with 3 wire connectors may not have the same wire colors.

The difference between 2 wire fans and 3 wire fans is the availability of feedback from the fan for closed loop speed control. There is no fan control. White wire from the condenser fan motor to one side of power on the contactor t1 and jumped to one side of the fan capacitor. If you need to install a 3 wire computer fan forget the wiring diagram.

When using a 3 pin power connector with a 4 pin fan header the fan will always be on. I ll provide a diagram and explain the wires below. A 3 wire fan can be controlled using the same kind of drive as for 2 wire fans variable dc or low frequency pwm. For a visual picture of typical wiring configurations reference the following guide.

Most computer motherboards come with a standard connector for the fan and it only fits one way. Connect black fan wire to the black ceiling wire. Usually yellow or green color wire is used in a 3 wire fan for the pulse output tacho connection. Finally this guide is intended to be used as a general overview of common condenser unit wiring schematics.

Desktop board has a 4 pin fan header. In the switch box. Fan has a 3 pin power connector. This demonstration shows the effects of.