... regulation 2. Supporting driver test running function3. Supporting phase memory function4. Supporting PLS+DIR and CW/CCW control signal5. Supporting optocoupler ... 5.4, 5.7, 6.Micro step2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 100, 128, 200, 256Input signalThree control ... output, maximum current: 20mAProtectionOver-voltage, under-voltage, short circuit, overheat Stepper motor driver 2M880N