... -40, humidity <90%I/O ports:VCC+: DC power positive pole (Note: it must guard against exceeding 50V, so as not ... (Rising edge effective,rising edge duration >10uS)DIR + DIR-: Stepping motor direction input, voltage level touched off,high towards, low reverseENA ... whether the wiring of electrical machinery is a mistake CW5045 2-phase Stepper motor driver, Stepping motor driver,1.5A~4.5A, 24Vdc~48Vdc