General Information
The motor bridge module MM432 is used to control two DC motors with a nominal voltage of 10
24 VDC at a nominal current up to 4 A. The module is also equipped with two ABR channels as
well as six normal digital inputs for creating positioning tasks which are not too complex.
Each motor is controlled with a full-bridge (H-bridge). Therefore, the motors can be moved in
both directions. Each bridge branch has its own supply voltage allowing two different motors with
different voltages to be used. Each channel has current measurement, supply voltage
measurement, and short circuit recognition to ground and to the positive supply voltage. Motor
control takes place using a 16 kHz PWM signal and is therefore mostly noise-free.
A local processor provides the required intelligence and is used for communication with the
higher level CPU. It handles the preparation of the ABR inputs and normal digital inputs, the
control of both motors (each with a PWM signal) and the analog measurements.
