AMC 25A20DD

The 25A20DD PWM servo amplifier is designed to drive brush type DC motors. The PWM frequency is determined by the PWM input signal. The drive is fully protected against over-voltage, over-current, over-heating and short circuits across motor, ground and power leads. The drive interfaces with digital controllers that have a digital PWM output but can also be used as a stand-alone system when using Pot 2. The 25A20DD drive requires only a single unregulated DC power supply as all logic and control voltages are generated internally. PWM input determines the output duty cycle. "Direction In" determines which side of the "H bridge" output is switching. Current limit can be reduced by Pot 1 (14 turn potentiometer), by the DIP switches and/or by an external current limiting resistor. The voltage at the current monitor pin P1-15 is proportional to the actual motor current.

Four Quadrant Regenerative Operation