Precautions:1. The 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 and current are very , please do not short circuit when the module is not working normally.Once the short circuit has the possibility of burning the line, the first wiring test machine Please use small current and low voltage test, after ok, then pass high current and high voltage, because it is bare board module for sale, 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 far from the motor to avoid inexplicable damage.1.MA MB phase line output connection motor2. 5V GND motherboard comes with 5V supply (current does not exceed 30MA)3.VCC GND motor main supply (external DC 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 cycle to support dual signal input speed regulation)7.Ha Hb +5V GND Hall signal input, generally with Hall's motor has five corresponding linesMotherboard specifications: Product Name: 450W Brushless Hall DC Motor DriverOperating voltage: 9-60VMaximum current: rated 16A 20AMaximum : 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.