ITEM NAME:DM556 PWM Bipolar Constant Current 24-50V DC Digital Stepper Motor Driver For 42 Features: High Performance: 24V-50V DC power supply, 8 level adjustable, output current 1.0A-5.6A. Low Noise: Bipolar constant current PWM drive output. Low speed zero vibration, and low noise. Optical Isolation: Optical isolation input signal, pulse response frequency up to 200kHz. Anti Interference: Strong capability, achieve high precision positioning in complicated environment. Compatible Model: Fit for 42 or for&;nbsp; 57 stepper motor and suitable for automatic packaging machine and so on. Specifications: Material: Plastic Color: Black Compatible Model: For 42 stepper motor, For 57 stepper motor Input voltage: DC 24-50V Output current: 1.0-5.6A Adjustable Level: 8 Resolution: 0.5A Drive Method: Bipolar constant current PWM drive Pulse Response Frequency: 200kHz(Max) Insulation Resistance: &;gt;500MÃŽ © Insulation Strength: 500V/min Dimensions: About 118x75.5x34 mm(L*W*H) Package Included: 1 pc*&;nbsp;Digital Stepper Motor Driver Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement..Low Noise: Bipolar constant current PWM drive output. Low speed zero vibration, and low noise. Compatible Model: For 42 stepper motor, For 57 stepper motor. 1 pc &;nbsp;Digital Stepper Motor Driver.