High power 40A forward and reverse motor speed controller, brush motor forward and reverse controller 12V 24V 36V With positive and negative switch, potentiometer knob with switch, you can use PLC to control positive and negative. Input voltage: DC10-50V Output voltage: linear under load Output limit current: 40A (use 20A for a long time, pay attention to keep the module smooth and heat dissipation conditions) Ultimate power: 2000W Speed regulation type: flow regulation Speed regulation method: potentiometer (linear) Speed regulation duty cycle range: 0-100% Control frequency: 25KHZ Wiring type: Barrier terminal block Knob cord length: 20CM Potentiometer opening according to installation: 7MM Before powering on, make sure that the positive and negative connections are correct. Do not touch the heat sink with the wiring, which may burn the circuit board. Note that this is not a power supply module, it must be connected to the motor to adjust the speed, the output of the multimeter not change without the motor, and AC power cannot be connected. For brushed motors. Color: As Shown Material: PCB Package Contents: 1 x Controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.