The OMS MD125 is a high-end micro-step motor driver with selectable micro-step resolutions. The MD125 is small, compact and robust and provides available step rates range from full-step to 256 micro-steps. The MD125 driver is capable of delivering up to 1.5 million micro-steps per second to the step motor and an output current from 0.1 to 7 amps, operating from a supply voltage of 12 to 80 VDC. The MD125 is designed to run hybrid PM step motors rated from 0.1 to 14 amps per phase. When used with suitably sized motors, the MD125 can provide over one-third of the horsepower (300 watts) to the application.

Two adjustment pots allow the user to trim to a particular step
motor. This nulls out any residual step error for optimum performance.

The MD125 features an electronic circuit breaker to help protect the driver from dangerous conditions. Over-current (winding shorts, etc.), over-temperature (insufficient heat sinking), and under-voltage are sensed by the MD125. When any of these conditions occur, the MD125 shuts down and turns on a fault LED to indicate the presence of the fault condition.

Measuring only 4"x4.5"x.875" the MD125 is small and compact. It comes encapsulated in a heat conductive epoxy and encased in an anodized aluminum cover. The result is an environmentally rugged package that resists abuse and contamination. The pin-out, size and mounting of the MD125 driver is compatible with the previous OMS micro-step drivers - MD10A and MH10.

Parameter Name	Parameter Value
AC/DC	DC
Motor type	microstepping
Other characteristics	compact
Output voltage	Min.: 12 VMax.: 80 V
Current (A)	0.1 - 14