DMA 85B 1103-D

The Bosch Rexroth Indramat DMA 85B 1103-D is a high-performance module from the DMA Servo Drive Modules series designed to control three-phase AC servo motors in demanding automation systems. With an Input Voltage rating of 670 V and an Output Voltage of 400 V, it delivers stable power conversion for motion control applications. The module supports a peak current of 85 A, ensuring rapid acceleration and high dynamic response for precise positioning tasks.

This drive module features a first-generation real-time communications interface (SERCOS) for seamless connectivity between motion devices, industrial controls, and I/O devices. The integrated encoder interface provides essential feedback without additional peripherals, while the module can be configured as either a master drive or slave drive to suit complex multi-axis setups. It includes a 24 VDC current input of 1.35 A for auxiliary circuits and is air-cooled via backplane mechanics to maintain optimal operating temperatures. At a weight of 11.5 kg and a width of 0.1 m, the unit fits compactly into control cabinets without sacrificing performance.

Built for rugged industrial environments, the DMA 85B 1103-D withstands vibration from 2 to 150 Hz with a maximum displacement of 1 mm and shock loads up to 15 g in accordance with DIN IEC 68-2-27. It is rated for operation at up to 1,000 m above sea level without derating, extendable to 3,000 m with performance adjustments. The permissible ambient temperature range is 0–45 °C (46–55 °C with derating), and storage temperatures span –25 °C to 70 °C, provided the surroundings are free of corrosive materials, dust, and metal vapors. These robust specifications, combined with industry-standard compliance and proven Rexroth reliability, make the DMA 85B 1103-D an ideal choice for precision motion control in industrial applications.