Description: This module is supplied as a stepper drive signal.To control the stepper motor,but also must have the drive to use. The controller has high,medium and low total of three types of frequency signals can be used to select for jumper. Frequency of measurement can amount PUL and common cathode terminal (GND) two. PUL + and PUL- pulsed positive and negative; EN + and EN- is to enable the positive and negative terminals; DIR + and DIR- are the positive and negative directions.These six lines are connected to drive the corresponding pulse,direction,so six possible. The forward and reverse of the motor can be controlled by pressing the key.the speed of the motor can be controlled by adjusting the frequency of the potentiometer. Specifications: Material:Metal+Plastic Power supply:15-160VDC or 5-12VDC.If you are using 5-12VDC power,positive end connect DC 5-12V Input,negative end connect Common Cathode End. Frequency:High:5.8KHZ-127KHZ,Mid:590HZ-15.8KHZ,Low:82HZ-2.3KHZ Size: 73x51x37mm/2.87x2.01x1.46inch Note: 1.Please allow slightly error due to manual measurement. 2.Due to the difference between different monitors,the picture may not reflect the actual color of the item. 3.Wish you a wonderful on-line shopping! Package included: 1x PWM Pulse Signal Generator