Skip to main content

Site Navigation

Your Account

Choose Language

Help

Revision to Connecting and configuring fans

David Crocker

4-wire fans have a separate PWM input wire. The recommended connections are:
 
Red (or yellow, if there is no red wire) and black wires: connect them to the + and - pins respectively of an always-on fan connectorconnector.
Red (or yellow, if there is no red wire) and black wires: connect them to the + and - pins respectively of an always-on fan connectorconnector.
 
Blue wire (PWM control): connect it to the FAN- pin of your chosen controlled fan connectorconnector.
Blue wire (PWM control): connect it to the FAN- pin of your chosen controlled fan connectorconnector.
 
YellowTacho wire (tacho outputwhatever wire is left, usually green or yellow): optionally, connect it to the cathode of a small signal diode (1N4148 should be OK) and connect the anode of the diode to pin PB6 on the expansion connector, to provide a reading of the fan RPM. Or you can leave the yellow wireit not connected.
YellowTacho wire (tacho outputwhatever wire is left, usually green or yellow): optionally, connect it to the cathode of a small signal diode (1N4148 should be OK) and connect the anode of the diode to pin PB6 on the expansion connector, to provide a reading of the fan RPM. Or you can leave the yellow wireit not connected.
 
In the M106 command for that fan, use the I1 parameter to correct the PWM sense, e.g.:

To undo the changes made by this version, click 'Revert Changes.' This will automatically restore the previous version of this guide.

Revert Changes