Four-wire PWM fan temperature control governor with control signal 10V, support common EBM four-wire fan.<br> Support conventional high-voltage fan four-wire control (10V PWM signal);support low temperature shutdown fan (PWM off or extended relay to turn off fan power ).<br> Wide voltage operation DC11-55V; Supports 2.5KHZ and 20KHZ frequency settings; Supports anti-timing fans.<br> Power supply voltage: DC11-55V (circuit operating voltage)<br> Working current: Less than 0.1A<br> Fan current: Less than 5A (on-board connector withstand capability, if you need to control higher power, you only need to take the power cord separately)<br> PWM range: 5-100 or 0 (% plus or 0.3%)<br> PWM frequency: 20KHz or 2.5KHz (2%)<br> PWM signal amplitude: 10.5V (no load)<br> Temperature measurement range: -9.9-99.9 C<br> Temperature measurement error: error within 0-50 C is less than 1.2 C, other range error is less than 2 C<br> Interface introduction:<br> Power connector (blue screw terminal): The main power input interface supplies power to the control board and the fan.<br> Fan interface (white VH3.96-4P socket): fan output interface, please refer to the for sequence.<br> Temperature probe interface: Connect NTC probe parameter 10K B=3950.<br> Alarm signal port (WORK): Outputs a high level during normal operation and outputs a low level when the fan is abnormal.<br> Relay interface (RELAY): An expansion interface that drives a 9V or 12V relay that can be used to control the fan power . When the fan control is stopped, the relay is disconnected.<br> Material:plastic<br> colour:green<br> Package Contents:<br> 1 x Controller<br> Only the above package content, other are not included.<br> Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.