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: PlasticSize: 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 Board1 x Gasket1 x Nut