Feature:1. This module is pulse generation module, supply stepper driver as a signal, to control stepping motor, also must match the drive.2. The simple controller + stepper driver + stepper motor, dc power can be composed of a set of simple control platform.3. The controller has high 5.4 k 540 - in - 160 KHZ, 16.6 KHZ, low on a total of 3 80-2.4 KHZ frequency signal can be used to jump needle selection.4. Can produce pulse signal as well as PWM signal, cand an choose jumper.5. Frequency measurement: can measure both PUL and coyin (or coyang) ports.Specification:Condition: 100% Brand NewItem Type: Stepper Motor Drive ControllerMaterial: MetalColoe: As Pictures ShownOut of sync motor driver port tag is different but the same functionEN = ENA = FREE can makePUL = PULS = CLK pulseDIR = the CW = CWW directionYang connection (B)EN + PUL + DIR + together received a total of anode side.Meet EN EN -PUL - answer the CLKDIR - meet DIRA total of Yin connection (B)EN - PUL - DIR - together received a total of cathode .EN + meet ENPUL + answer the CLKDIR + meet DIR.Package List:1 x Stepper Motor Drive Controller2 x Screw Gasket