Features: DC24V-50V power supply, 8 level adjustable output current 1.0A-5.6A. Optical isolation input signal, pulse response frequency up to 200kHz. Bipolar constant current PWM drive output, with strong anti-interference ability and can achieve high-precision positioning in complex environments. Low speed 0 vibration, and low noise, provide you with excellent usage effects. Suitable for 42/57/86 stepper motor, widely used in automation equipment such as automatic packaging machines and carving machines. Specifications: Material: Plastic Size: Approx. 118x85.2x34.3mm/4.65x3.35x1.35" Model: DM556 Application: for 42/57/86 stepper motor Input-voltage: DC20-50V Output Current: 1.0-5.6A, 8 level adjustable, 0.5A resolution Drive Way: Bipolar constant current PWM drive Pulse Response Frequency: 200kHz(Max) Insulation Resistance: >500M Insulation Strength: 500V/mins Note: Please allow 0-1cm error due to manual measurement. Please allow for slight color difference due to different display resolution. Package includes: 1 Set DM556 Digital Motor Driver