Product Description:

The DMA 140D 4101-D is a drive module manufactured by Bosch Rexroth Indramat for the DMA Servo Drive Modules series. Classified as a 3-phase module for synchronous and asynchronous motors, it feeds the motor windings with controlled current while monitoring feedback for closed-loop performance. Its integrated controller supports one-axis positioning, allowing a single mechanical axis to execute indexed moves without an external motion card. This reduces panel wiring and PLC cycle overhead in industrial automation cells. It is suited to applications that require coordinated speed and position control on a single axis, such as packaging, conveying, and material-handling equipment.

Within its power stage, a regulated bus of 670 VDC is sustained, whereas the upstream rectifier can raise the unregulated link to 715 VDC when mains voltage is at its upper tolerance. The factory-set switching frequency of 8 kHz affects both audible noise and dynamic current response. At this carrier frequency, the module supplies a continuous phase current of 60 Arms, matching medium-torque motors used in packaging and material-handling equipment. For rapid acceleration or brief overloads, it can deliver up to 117 Arms before protective limits reduce output, which supports short peak-demand events without increasing the continuous rating of the power stage.

Heat produced during these cycles is removed by backplane air cooling, which draws enclosure air across the 200 mm-wide heat sink shared with adjacent drives. Control electronics consume only 1.58 A from the 24 V auxiliary bus, leaving headroom for sensors and I/O modules on the same supply. When ambient temperature rises above 45 °C, output capacity decreases linearly by 1.75 A/K, which makes the derating behavior predictable at higher cabinet temperatures. Under full load, the module transfers up to 700 W of heat into the cabinet airflow, so the enclosure must provide enough airflow to keep the power components within their operating range.