Feature:1. Motor Features: Using PI control algorithm, the stepping motor has the characteristics of low noise, low vibration, low heat and high efficiency.2. Subdivision and Current: There are 16 kinds of subdivision and 16 kinds of current, the operation current and subdivision can be selected through the dial switch.3. Optical Isolation Signal: Adopts optical isolation differential signal input, with maximum input pulse frequency of 300KHz and quick response speed.4. Circuit Protection: With the functions of overvoltage and undervoltage alarm, phase current overcurrent protection, motor phase open circuit detection, etc.5. Constant Current Input: Pulse, direction and enable terminals have constant current input function, and can be directly connected with input signals.6. Simple Motor Control: Built in oscillator, dial code or switching value signal controls the motor start and stop, the 16 speed can be switched automatically.Specification:Item Type: Stepper Motor SetDrive Parameters: Output Current (peak Value): 2.8-7AControl Signal Current: 6-16mA, Typical: 10mAStep Pulse Frequency: 0-300KHzStep Pulse Width: Minimum 2usDirection Signal Width: Minimum 100usUndervoltage Protection Point: Typical 7.5VDCOvervoltage Protection Point: Typical 100VDCDriver Initialization Time: Minimum 2SInsulation Resistance: Minimum 500Motor Parameters: Motor Model: NEMA23-76-0821DRated Current: 4A/PhaseHolding Torsion: 2N.mResistance: 0.4/Phase+10%Weight: Approx. 1kg / 35.3ozBody Length: Approx. 76mm / 3inAdaptive Driver: 2DM542.Package List:1 x Stepper MotorDriver1 x Stepper Motor Note:1. Do not connect the power supply reversely, and the input voltage should not exceed DC90V2. The green indicator PWR lights up when the drive is powered on.