Features Only supports DC input, with reverse power protection function, support voltage range: DC2-50V. By setting, it can support a variety of motor parameters When manually controlling the motor independently, the basic frequency of the PWM of the control motor can be set by jumpers to match the noise of different motors at different speeds to minimize With alarm output function, when the motor is blocked, it can send a signal to the control card or PLC, and let the control card or PLC perform related actions such as stop. With power indicator, stalling/overcurrent alarm indicator function Feature: 1. When independently controlling the motor manually, the corresponding potentiometer on the governor can be adjusted to control the speed of the motor Specification:Item Type: Speed Controller Input Voltage: 12-50VDC Maximum Current: 20A Speed Regulation Mode: PWMThe Base Frequency has 3 Levels: The jumper shorts the left 2 pins is 2.1KHZ, the 2 short pins on the right are 2.9KHZ, and the 3 pins are short-circuited 11.1KHZ. The default is 2.9KHZ when shipped 2 Control Methods: Control whether the motor is controlled manually by an jumper switch or an external PWM signal is connected to the control card or PLC. External PWM input requirements are: Level 3.5-12V VPP, frequency 1K-5KHZ, duty cycle is 0% -93% Input Interface Specifications: The internal resistance is 330 ohms when connected to a PLC. To connect a 1.5-2.7K ohm resistor in series. Connect directly to a 5V level motion control card such as MACH3. Alarm Output Interface Specification: The Maximum Driving Current is 12MA. Super High Power Control: Maximal 20A, it is recommended not to exceed 15A Package List:1 x Speed Controller Package List 1 x Speed Controller