Potentiometer speed controllers for EC motors

Potentiometers  speed contreollers PO1 are designed for devices where a DC control signal required of fans with EC motor. A speed setting can be made through energetic recovery to the input of the fan/controller by connecting the potentiometer to a supply voltage (10 V) provided by an EC fan or controller. Alternatively, a set-point (external set-point) can be preset through the potentiometer.