Product Description:

The 7MM432G/2 is a compact motion and I/O controller produced by B & R Automation for the System 2003 Controllers series. It functions as an interface between low-voltage power electronics and stepper or DC drive stages. It coordinates current loops, PWM generation, and discrete input sensing for mid-range machine cells in industrial automation.

This unit is designed for a nominal control rail of 24 VDC; staying within that range protects the sink-type input circuit and ensures stable logic referencing. A continuous output of 4.0 A drives connected motor bridges while permitting temporary excursions to 8.0 A for inrush or acceleration events. Those peaks are limited to 2 s so that copper losses and thermal rise remain within device ratings. The bridges are pulse-modulated at 16 kHz, a frequency high enough to minimize audible noise yet low enough for efficient switching. Up to 35 VDC of overvoltage can be tolerated on the supply bus, preventing nuisance trips when inductive loads collapse. Two internal motor bridges share the 2.5 W power budget; this figure helps planners size cabinet power supplies and ventilation. With a sink input topology, field devices pull currents toward the controller’s common return, simplifying wiring when using PNP sensors.

Six analog bridge channels sample load conditions at 20 kHz, allowing rapid current or voltage evaluation without aliasing. The hardware offers 6 ABR inputs plus 6 general digital inputs so motion feedback and discrete states can be captured on the same board. Current feedback is quantized at 50 mA resolution, which is adequate for vector-based current regulation schemes that rely on the controller’s 4× evaluation circuitry. Live conductors are enclosed by an IP20 housing once the module is mounted on a DIN rail.