B&R Automation: Cost-effective motor/valve control
B&R’s new digital output module X20DO4332-1 has integrated pulse width modulation and is a cost-effective alternative to motor modules. In addition, the module offers a dither function that prevents valves from sticking. Pulse width modulation (PWM) is mainly used for controlling larger loads, such as motors. Instead of using electronics to regulate a continuous input voltage down to the desired motor voltage, the motor is controlled by the width of the switching pulses.