Description: This controller can generate a PWM signal functions, the board has a jumper, you can set the default selection provided in the pulse frequency signal. Features: 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 jumper. Frequency of measurement can amount PUL and common cathode terminal (GND) two ports. 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 ports possible. 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. 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. Specification: Power supply voltage: 15-160V / 5-12V Frequency: High: 5.8KHZ-127KHZ, Mid: 590HZ-15.8KHZ, Low: 82HZ-2.3KHZ Size: Approx. 50 x 51 x 37mm / 1.97 x 2 x 1.45inch Weight: 50g Quantity: 1pc Package List: 1 x PWM Generator Note: 1.If you use to start or stop the function, ENA controller enable terminal must be connected to common cathode or common anode drive. 2. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering .