[Motor Controller Parameters] This three-phase brushless DC motor control board has a power output of 400W and a voltage range of 6-60V. This three-phase brushless DC Hall effect controller supports PLC, 0-5V touch volume control, and 2.5-5V PWM control. This driver is only suitable for brushless DC Hall effect motors with a rotation angle of 120 degrees. [DC Motor Speed Controller] MA, MB, : Motor phase outputs. 5V, GND: Internal 5V power supply on the motherboard. VCC, GND: Main power supply. SC: Speed pulse signal output. DIR: Direction control: Forward/reverse control interface. STOP: Stop control interface. [Motor Speed Controller] Brushless motors generally have five Hall effect lines or interfaces. Two of these are Hall effect power lines, and three are Hall effect signal lines, specifically used to distinguish the Hall effect power lines. The three Hall effect signal lines are typically labeled a, b, and c. The driver board also has three ports labeled ha, hb, and . Simply connect them correctly. Functions include overcurrent, forward/reverse, stop, and brake. (The parts are different, but it does not affect normal use) Color: As Shown Material: ABS Package Contents: 2 x Brushless Motor Speed Controller 2 x Cable 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.