1. Double H bridge, which can drive two DC motors, single 7A current, high power; Wide voltage input 6.5V ~ 27V; Signal optocoupler isolation input, IO port can be directly controlled, without interference; Undervoltage protection, to prevent instantaneous high-current burned module; High-power and electrostatic discharge circuit, inhibit the transient interference pulse and static, enhanced EMC performance, stable and reliable product, industrial design. 2. Power supply voltage 6.5V-27V, power supply must not be connected to or over 27V, otherwise it may burn out the module, it is recommended that the power input in series 1 fuse.. Dual motor interface, each rated output current 7A, current 50A, the motor interface must not short-circuit, the proposed series 10A fuse. Control signal voltage 3-6.5V, respectively, is the enable signal and the positive inversion control signal. 3. Enable signal terminal () input PWM adjustable speed, PWM frequency range 0-10KHZ, PWM minimum pulse width 10us. Working temperature -25 -80 . Installation hole diameter: 3mm, attention should be paid to prevent short circuit on the back of the circuit, you can add insulation pad or copper column to raise the circuit board. 4. Suitable for motor parameters: Rated voltage 24V of the motor, the appropriate identification of rated power 115W and below or rated current of 7A or less the following long-term work of the motor. Rated voltage 12V of the motor, the appropriate identification of rated power 40W and below or rated current 7A rated below the motor for a long time full of work. Precautions: 1. Drive power must not be reversed, the proposed power connector in series 1 fuse, the voltage should be between 6.5 ~ 27V. If the voltage is over-voltage, power-on may burn module. 2. It is recommended that the rated output current of the power supply should be at least 2 times of the rated current of the motor so that the power supply can not supply the required voltage when the motor starts. Off the output lead to the phenomenon of motor pause. 3. Do not short-circuit the motor interface, or may burn the driver module, the proposed electrical interface in series 10A fuse. 4. In the forward and reverse switch when the need to brake 0.1S above and then reverse, not in the motor has not stopped when the commutation, or it may damage 5. Drive module power-down, do not directly or indirectly, high-speed rotation of the motor, or motor generated electromotive force may Burn module. If the application requires a high-speed rotation of the motor when module is powered down, it is recommended. The motor interface of the driver is connected in series with a relay (NO and COM terminals), and the relay coil and the driver are connected in common. In this way, when the power down, the relay will disconnect and the motor connection. 6. CAUTION Do not expose to moisture. Do not short-circuit the components on board. Do not touch the pins and pads on the board. 7. Before you use the baby carefully read the description, as a result of damage caused by improper use of the module, do not change Note: Where 0 is low, 1 is high level, x is any level, when floating high. color:Red Material:PCB size:55 x 55 x 16mm Package Contents: 1 x DC Motor Driver 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.