... from 12V to 56VDC, 0-10V/PWM speed control, tache output, fault alarm, easy to control speed and saving 40% energy ... functions include PFC (passive), control input 0-10 VDC / PWM, output 10 VDC max 1.1 mA, fault signal relay, Over ... noise 48V BLDC Fan motor driver or controller with tach output