SainSmart CNC 2-Phase Stepper Motor Driver ST-DM542

Overview: ST-DM542 2 phase stepper motor driver, using the bipolar constant current PWM current control mode, the motor runs smoothly and quietly, high cost performance the maximum output of 4.2 drive current, suitable for NEMA17, NEMA23 stepper motor with a height of less than 112mm. Specification: +V: DC Power positive terminal GND: DC Power negative terminal A+/A-: Stepping motor one winding B+/B-: Stepping motor other winding Working environment: Temperature-15?50?, Humidity<90% ENA+?+5V-24V?ENA-: motor free