DMA 85B 1201-D

DMA 85B 1201-D, Bosch Rexroth Indramat, DMA Servo Drive Modules – this high-performance three-phase drive module delivers precision control for both synchronous and asynchronous motors. It forms part of the renowned Servodyn-D Series, offering a seamless interface between drive and motor for demanding motion-control tasks. The module’s compact profile and robust design support quick installation and commissioning in industrial environments. Built for dynamic response, the DMA 85B 1201-D excels in applications requiring tight regulation of current, speed, and position.

Equipped with an air-cooling heat-loss system and a nominal width of 100 mm, the DMA 85B 1201-D maintains thermal stability under prolonged load. It employs a SERCOS interface with a gear encoder and an integrated 32-bit signal processor for deterministic digital control. The drive tolerates a DC link voltage of 670 V regulated (715 V non-regulated) while delivering a rated current of 22 A and supporting a peak current of 86 A at a switching frequency of 4 kHz. Auxiliary power is supplied via a 24 VDC current input of 1.35 A, and the module dissipates up to 380 W of peak power in a standard switch cabinet. Enclosed to IP20 protection, it meets stringent industrial safety and interference standards.

Designed for integrated automation, the DMA 85B 1201-D automatically limits peak current based on semiconductor thermal limits, ensuring reliable operation across ambient temperatures up to 55 °C. Its modular architecture supports direct coupling to Rexroth servo and asynchronous motors, streamlining system layouts and reducing cabinet space. With proven robustness and precise motion capability, this servo drive module is ideal for packaging machines, CNC systems, and high-speed assembly lines where performance and uptime are critical.