... speed by 0-10V/PWM signa, alarm reply, etc. avaialbe in 12V to 56V DC input. DC input, 100% speed controllable, energy- ... efficiency, longger motor life and competitive price 1. Supply Voltage: 12~75VDC2. Max power: 200W3. Speed control: 100% controllable by ... voltage protection,fan speed controls, fan good/bad alarm,temperature/pressure/CO2 sensor alarm and custom fan trays. our driver and ...