Supply voltage 24VDC or 48VDC, voltage range from 12VDC to 75VDC, 100% speed control by 0-10VDC or PWM ... -free, power,etc.Applications: External rotor motor, centrifugal fan, centrifugal blower, axial fan in HVAC,Tele-communication, refrigeration, clean room, IT industry ... saving motor, DC and EC Centrifugal fan, DC and EC axial fan, DC and EC circular duct fan, EC Gas blower, etc. High ...