Features: This board adopts high-quality ultra-small optocoupler, which has strong anti-interference ability, stable performance, and completely isolates input signal and output. The drive module can input PWM to control motor speed, light brightness, etc. The PLC amplifier circuit board has input and output signal indicators. The output can control high-power equipment, light bulbs, LED strips, for DC motors, micro-pumps, solenoid valves, and more. The switch is professionally designed and easy to install. Specifications: Material:PCB Size : As Picture Shown Input signal: PWM signal between 3~20V Output capability: for DC 3.7V~27V, current within 10A per channel PWM frequency: 0~20KHZ Indicator light: with input signal and output indicator Application description: The output terminal can control high-power equipment, motors, light bulbs, LED strips, for DC motors, micro water pumps, solenoid valves, etc., and can input PWM to control motor speed, lamp brightness, etc. Module interface description: DC+: The positive pole of the for DC power supply of the device DC- : Negative pole of the for DC power supply of the device PWM: Signal input terminal (connected to the IO port of the microcontroller, PLC interface, for DC power supply, etc.) GND: Signal negative terminal OUT+: Positive pole of the output terminal (connected to the positive pole of the device) OUT-: Negative pole of output terminal (connected to the negative pole of the device) Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x Drive Module