1 large radiator ensure the long-term stability. 2 automatic half current function reduce motor heating. 3 the output protection. 4 you can set 1248163264128 subdivision up to 128 segments. 5 a current setting function. Adapter 0.5A 1A 1.5A 2A 2.5A 3A of 4257 Series stepper motor. 6 wide operating voltage. Input voltage DC: 9~32V. Could work. 7 anti-power reverse feature power reversed not burn IC. 8 easy installation set aside on the radiator mounting screw holes. 9 ultra high-speed optical coupling 10M bandwidth signal input to do to ensure that the high-speed performance. 10 a motor rotation direction indicator and power indicator. Easy and intuitive. Drive to the wiring 1) Drive also supply 12~32V can be 2) Drive on the left four ports connected two-phase stepper motor 4 line the first to distinguish between motor group A and group B as shown connected to the corresponding port remember to group A and group B line dislocation lines not connected But within the same line Which received + - it does not matter. If the motor rotates in the wrong direction you can reverse it two lines 3) Drive the right ports EN + and EN-time to wiring PUL is a pulse input DIR direction input can be connected to the interface board or a related signal generator