Supply voltage 24VDC or 48VDC, voltage range from 12VDC ... Fault alarmetcCan be customized according to customer demands, such as Supply voltage range, No noise, hall-free, power,etc. ... etc.Can be customized according to customer demands, such as Supply voltage range, No noise, hall-free, power,etc. ... EC circular duct fan, EC Gas blower, etc. High efficiency EC fan 24V brushless DC motor driver controllor