Fangrui Product Details Dm556 Stepper Motor Driver: Input Voltage: Dc 20-50v; Output Current: 1.0-5.6a, 8 Level Adjustable, 0.5a Resolution. Dm556 Is A Of High Performance Digital Stepping Driver Based On 32-bit Technology. Two Phase Hybrid Stepper Motor Of Types With Current Below 4.2a And Outer Diameter 42-66mm Is Provided. Suitable For Nema 17, Nema 23 And Nema34 Stepper Motor,2-phase Hybrid Stepper Motors (outer Diameter: 42,57,66mm). Used For All Kinds Of Small And Medium-sized Automation Equipment And Instruments: Engraving Machine, Marking Machine, Cutting Machine, Laser Typesetting, Plotter, Cnc Machine Tools, Automatic Assembly Equipment, Etc. Digital Stepper Motor Driverstandard Single Pulse Interfaceprovides Energy-saving Semi-automatic Current Locking Function, Semi-enclosed Housing Can Be Adapted To More Stringent Environmenthigh Speed Optocoupler Isolation Signal, Strong Resistance To High-frequency Interferencebuilt-in Overheat, Over-current,over-voltage And Under-voltage Protection, Can Drive 4,6, 8 Wire Two P