Precautions:1. The power supply circuit on the main board has no fuse, and the built-in self-addition will cause permanent damage to the chip on the board (even 2 seconds is not allowed).2. During normal operation, there is sampling overcurrent protection at the motor output. Since the module power and current are , do not short circuit when the module is not working normally. the short circuit has the possibility of burning , the first wiring test machine use small current and low voltage test, after ok, then pass high current and high voltage, because it is board module for , pay attention to the wiring line insulation, strong voltage is not allowed to Press the board parts.3. Do not connect the motor that is obviously inconsistent with the voltage and current of module or is from the motor to avoid inexplicable damage.1.MA MB phase line output connection motor2. 5V GND motherboard comes with 5V power supply (current does not 30MA)3.VCC GND motor main power supply (external DC power supply)4. speed pulse signal output5 positive and negative reversing control interface (also can be connected to the external switch)6.VR speed control signal input (onboard with potentiometer speed control can also be connected to 0-5V analog simulation PWM duty to support dual signal input speed regulation)7.Ha +5V GND Hall signal Power input, generally with Hall's motor has corresponding linesMotherboard specifications: Product Name: 450W Brushless Hall DC Motor DriverOperating voltage: 9-60VMaximum current: rated 16A 20AMaximum power: 450WOvercurrent protection: YesColour:RedMaterial:plasticPackage Contents:1* Brushless Motor ControllerOnly the above package content, other products are not included.Note: Light 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.