... moduleGND: DC power cathodeA+ A-: Stepping motor one winding B+ B-: Stepping motor other windingPUL+ PUL -: Stepping pulse input+5V (Rising edge ... effective,rising edge duration >10uS)DIR + DIR-: Stepping motor direction input, voltage level touched off,high towards, low ... electrical machinery is a mistake CW5045 2-phase Stepper motor driver, Stepping motor driver,1.5A~4.5A, 24Vdc~48Vdc