24V-50V DC power supply with 8 adjustable output current levels (1.0A-5.6A). Bipolar constant current PWM drive output for precise motor control. Optical isolation input signal with pulse response frequency up to 200 kHz. Strong anti-interference capability for high-precision positioning in complex environments. Features low-speed zero vibration and low noise operation. Suitable for 42/57 stepper motors, commonly used in automated packaging machines, engraving machines, and other automation equipment. Application: 42/57 Input Voltage: DC 20-50V Output Current: 1.0-5.6A (8 levels adjustable, 0.5A resolution) Drive: Bipolar constant current PWM drive Pulse Response Frequency: 200kHz (max) Isolation Resistance: > 500M Isolation Strength: 500V/min Color: Black Material: PCB+ABS Size: 12 x 7.8 x 3.5 cm Package Contents: 1 * DM556 Stepper Driver