... 1.5 A to 5A(1.5A,2.0A, 2.5A,3.0A,3.5A,4.0A, ... 4.5A,5.0A) Resolution: 1/2, 1/8, 1/16 , 1/32 , 1 ... DC power Supply B+, B- A+, A- Step+ (CP+), 5V Step- (CP-) pulse input EN + EN- Resolution ... 0=full currrentCNC DB25 Breakout Board adapter stepper motor driver IIIBuilt in DB25 male connector. DB25 Output ... Surface-mount Tech. 3 Axis two-phase Stepper motor Driver 5. 0A + DB25 Breakout Board adapter Kit ...