The 10k potentiometer is intended to be connected to an analog 0-10V control signal from an EC fan or VSD (Variable Speed Drive) that is used to control an AC fan.
The potentiometer’s resistance is 10k, and it follows a linear curve. For example, at 10% of its range, the resistance is 1k; at 50%, the resistance is 5k, and at 75%, the resistance is 7.5k, and so on.
It’s essential to note that the “0V” connection should be made to the 0V or GND terminal of the EC motor/VSD, not the Earth.
WARNING
The 10k pot and on/off switch are only for use with a 0-10V control signal and digital enable signals – do NOT connect it in any way with a 240V/415V power source of the fan or VSD.