When external PWM signal is input, the amplitude is 5V, and the recommended frequency of PWM is 1K-10KHz.For analog input, you can use the on-board 5v, external potentiometer gnd (resistance 10k-100k) to adjust the speed, or you can input analog (0-5v) externally, but it needs to be connected to gnd on the board.Forward and reverse rotation control, the motor needs to stop rotating and then perform forward and reverse operation. It is strictly forbidden to change direction during motor rotation, which will cause damage to the circuit board. Also, after removing the short-circuit cover, the direction switch can be externally connected for operation.5v, gnd the motherboard comes with a 5v power supply (power can be supplied externally, the current does not exceed 10mA)Speed pulse signal output, the amplitude is 5v, each pulse represents one revolution of the motor.Dfn package high power wide voltage 12-30v 200w 3-phase brushless DC with Hall controller, support plc 0-5v analog control, support pwm to 0-5v control, only suitable for DC controller. With Hall motor with brush 120 degree electric angle.Product Name: Brushless DC Motor Driver 200w Hall EffectModel: XY-BLDCWorking voltage: 12-30vMaximum current: rated 7A, maximum 10AMaximum power: 200wOvercurrent Protection: YesPositive and negative: yesBrakes: yesPWM speed regulation: yesAnalog speed control: yesColour:blackMaterial:pvcSize:80 x 30 x 10mmPackage Contents:1 x XY-BLDC moduleOnly 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.