... , 2A/4A/8A. 3.Miniature Size step motor driver Integrated step motor controllers with microstep with parallel port( ... Constant, PWM controlMicrostepping: Full-, Half-, Quarter- and 16th-step (2)Photocoupler Isolation voltage: 2500 Vrms (min)Photocoupler Input ... ) adjustable through on-board DIP switchCommunication: 3-wire, Step, Direction, and Enable signalsHandling, Storage and Size:Cooling Type ...