Description The driver uses discrete components structure, as long as no over voltage and wiring is right, please rest assured that two-phase 4-wire, 6-wire, 8-wire can be used. 57 series 4.5A or less (including 4.5A) two-phase four-wire, six-wire, eight-wire stepper motor also can be used Feature: 20KHz chopping frequency Optical isolation signal input Output current DIP switch is adjustable Bipolar constant current chopping method High segmentation: 2,4,8,16,32,64,128,256. 5,10,25,50,125,200 TTL input signal compatible,while accepting differential signal input Specifications: Power supply:DC 24-60 (V) Current maximum:4.5A Output phase current:1.5A-4.5A Logic input current:10-20mA Operating temperature:-15+45 Size:11.7*8.5cm/4.61*3.35inch Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Contents: 1 x DM542 stepper motor driver