Feature:   1. This module is a pulse generation module and supplies stepper driver as a signal.   2. To control the stepper motor, it must be equipped with a driver.   3. This simple controller + stepper driver + stepper motor + DC power supply can form a simple control platform.   4. The controller has a total of 3 kinds of frequency signals: high 5.4k-160khz, medium 540-16.6khz, low 80-2.4khz.   5. It can generate pulse signal and PWM signal, and can be selected by jumping. Frequency measurement: Can measure PUL and common cathode (or common anode) two port.   Specification:   Condition: 100% Brand New   Item Type: Stepping Motor Drive Controller   Material: Plastic   Size: Approx. 38.6 x 58 mm / 1.5 x 2.3 in   Different stepper motor drive port have different labels but the same function:   EN=ENA=FREE enable   PUL=PULS=CLK pulse   DIR=CW=CWW direction   Common anode connection (connection B)   EN+ PUL+ DIR+ connected together to the common anode   EN- connects to EN   PUL- connects to CLK   DIR- connects to DIR   Common cathode connection (connection B)   EN- PUL- DIR- connected together to the common cathode   EN+ connects to EN   PUL+ connects to CLK   DIR+ connects to DIR   Package List:   1 x Control Board   2 x Gasket   1 x Nut