Description:  Stepper Motor Controller 2-phase Digital Stepper Motor Driver 18-48 VDC Max. 4.2A for 57 86 Series Motor.     Specifications:  Product Name: DM542 Stepper Motor.  Power Supply: DC 24-60 (V).  Current Maximum: 4.5A.  Output Phase Current: 1.5A-4.5A.  Logic Input Current: 10-20mA.  Operating Temperature: -15°—+45°.  Size: 11.7*8.5cm/4.61*3.35inch.  Quantity: 1 Pc x Stepper Motor.     Features:  - The driver integrates overvoltage and overcurrent protection.  - Input signal optical isolation.  - Dipolar constant current chopping method.  - DC power supply 20-50VDC (24-48VDC work is recommended).  - Maximum drive current 4.2A.  - The output current dial switch is adjustable.  - Low speedm zero vibration, and low noise.  - High subdivision:2,4,8,16,32,64,128,5,10,20,25,40,50,100,125.  - Strong anti-interference ability, high-precision positioning canbe achieved in the harsh encironment of the power grid.  - High reliability:power devices have enouth margin, and they have been strictly tested before leaving the factory.     Package Included:  1 Pc x DM542 Stepper Motor Driver