1:Fully Digital 2-phase Stepping Driver 2:Input: 20-60VDC 3:Microstep:M,S,N,O 4:Support: PUL/DIR & CW/C ... 25 S microstep 2,4,8,16,32,64 selectable N microstep 5,10,25,50 selectable 0 microstep 25,100 ... over 5V, please connect external resistance R1, and keep the driver input termial under 5V.When pulse signal stopping, please disconnect ...