The Z12ADDC Series PWM servo amplifiers are designed to drive brush-type DC motors at a high switching frequency. They are fully protected against over-voltage, over-current, over-heating and short-circuit. A single digital output indicates operating status. All models interface with digital controllers that have digital PWM output. The PWM IN determines the output duty cycle and DIR input determines the direction of rotation. These servo amplifiers require only a single unregulated isolated DC power supply.