EM-175 DC-Motor Controller. EM-175 motor driver is designed for DC-motor speed control. The unit regulates motor voltage so non regulated supply voltage is well suited. A load affecting the motor rpm can be compensated with an adjustable load compensation (RxI). Unidirectional 2-quadrant, drive and brake Dynamic and regenerative braking Smooth start-up ramp Adjustable current limit Load compensation High efficiency High peak loading capacity Rail mountable