The driver is suitable to 2 phase stepping motor. It uses bipolar constant current driving method, its rated driving current is 6A/phase, and it just uses DC power (range: DC 20 - 80V, >4A). Except that, the driver owns a very compact size for users to install easily and includes lots of advantages as following: low noise, precise action control and so on. We use photo - coupler at input port to isolate the noise and design a special socket at I/O port to achieve user - friendly.