... adjustable from 1.5 A to 5A(1.5A,2.0A, 2.5A,3.0A,3.5A,4.0A,4.5A, ... RH<90% Input mode: monopulse and dipulse compatible I/O Port Connection:AC,AConnect 20 to 60V DC power Supply B+, B- A+, ... stepper motor driver IIIBuilt in DB25 male connector. DB25 Output Pin:P1,P2,P3,P4,P5,P6,P7,P8 ... : +5V DC. Built in C-class Optical-coupler. High quality with Surface-mount Tech. 3 Axis two-phase Stepper motor Driver ...