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 Set Drive Parameters: Output Current (peak Value): 2.8-7A Control Signal Current: 6-16mA, Typical: 10mA Step Pulse Frequency: 0-300KHz Step Pulse Width: Minimum 2us Direction Signal Width: Minimum 100us Undervoltage Protection Point: Typical 7.5VDC Overvoltage Protection Point: Typical 100VDC Driver Initialization Time: Minimum 2S Insulation Resistance: Minimum 500ΜΩ Motor Parameters: Motor Model: NEMA23-76-0821D Rated Current: 4A/Phase Holding Torsion: 2N.m Resistance: 0.4Ω/Phase+10% Weight: Approx. 1kg / 35.3oz Body Length: Approx. 76mm / 3in Adaptive Driver: 2DM542. Package List: 1 x Stepper Motor Driver1 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.