Control terminal connection: 1, GND 2, VR speed control port connection method can be controlled by voltage regulation control or PWM control speed voltage regulation can be adjusted by resistance adjustment (20K bit 3 pin 20K port side of 5V port to connect to GND through voltage control regulation) 3, ZF positive reverse port connection method to connect 5V in one direction in the direction of GND 4, port output single speed pulse output of a pulse circle = number of motor poles x 3 5.5V control terminal voltage output port 5V Power supply end connection: 1, positive input port power supply VCC (12V-36V) 2, GND power input port 3, MC brushless DC motor without direction / without Holzer three-line motor W 4, MB brushless DC motor without direction / without Holzer three-line motor V 5, brushless DC motor MA without direction / no Holzer three-line motor U