The DM556T is a digital stepper driver with simple design and easy setup. Key Features *AntiResonance for optimal torque, extra smooth motion, low motor heating and noise *Motor autoidentification and parameter autoconfiguration for optimal torque from widerange motors *Step and direction (PUL.DIR) control *MultiStepping for smooth motor movement *TTL compatible and optically isolated inputsto 5.6A *Input voltage 2050VDC *16 selectable microstep resolutions of 40025,600 via DIP switches *8 selectable output current settings of 1.8A to 5.6A via DIP switches *Softstart with no jump when powered on *Pulse input frequency up to 200 KHz *Automatic idlecurrent reduction *Protections for overvoltage and overcurrent Electrical Specifications *Output Peak Current 1.8~5.6A (4.0 RMS) *Input Voltage 20~50VDC (Typical 2448VDC) *Logic Signal Current 7~16mA (Typical 10mA) *Pulse Input Frequency 0~200kHz *Pulse Width 2.5?S *Isolation Resistance 500M? Operating Environment and other Specifications(Tj = 25?.77?) *Cooling Natural Cooling or Forced cooling *Environment Avoid dust, oil fog and corrosive gases *Ambient Temperature 0? ? 65? *Humidity 40PercentRH?90PercentRH *Operating Temperature 0? ? 50?*Vibration 1050Hz . 0.15mm *Storage Temperature 20? ? 65? *Weight Approx.300g (10.6oz) Warning Make sure the motor connect to a constant current or chopper drive controller before you test motor. Connecting the motor directly to a power supply will destroy the motor.