... 2-phase Stepping Driver 2:Input: 20-60VDC 3:Microstep:M,S,N,O 4:Support: PUL/DIR & CW/C YARAK Drive ... . Input Voltage (MAX) 60 the largest input voltage 60V5. microstep M fixed microstep 25 S microstep 2,4,8,16,32 ... ,64 selectable N microstep 5,10,25,50 selectable 0 microstep 25,100 ...