... control, tache output, fault alarm, easy to control speed and saving 40% energy We design, develop and supply motor controller ... SPIinterface.Main features of Brushless DC Fan Motor speed controller: Supply Voltage: 12~75VDCMax power: 200WSpeed control: 100% controllable ... Fault alarmetcCan be customized according to customer demands, such as Supply voltage range, No noise, hall-free, power,etc. ...