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Micro Stepper Driver MX-2H306D is mainly used to drive high voltage 57 type 2-phase hybrid stepper motor which current is below 3A. It is up to 22 segments and Max 40000 steps. Step could be set by 1 to 5 bit of DIP switch. Signal and doubt pulse mode. Self-test function, Phase memory function, auto half current function. Output max current is 3.0A. Current could be set bye 7 to 10 bit of the DIP switch (it could set 16 speeds current, setting resolution is 0.3A). MX-2H306D step drives is 40V to 60V DC power supply. Typical value is DC 40V or 50V. Recommend using switch power supply, power is over 150W. Relation setting and operation is as shown below.