Product Description:

The DMA 85B 1103-D is a servo drive module manufactured by Bosch Rexroth Indramat and supplied within the DMA Servo Drive Modules series. It serves as a mains-connected power converter that delivers regulated three-phase output to synchronous or asynchronous motors in automated production cells, printing machines, and gantry axes. By translating line voltage into controlled current and integrating with motion controllers, the unit provides the torque, speed, and positioning accuracy required in industrial automation.

With a module width of 100 mm, the drive occupies minimal panel space and can be arranged side by side in dense multi-axis racks. Thermal energy is removed through backplane air cooling, where cabinet airflow passes across the rear heat sink rather than the front face, eliminating the need for individual fans on the module. Command and diagnostic data are exchanged over the high-speed SERCOS interface, providing deterministic cycle times and optical noise immunity. Motor feedback signals enter through the integrated standard feedback interface, allowing resolvers or incremental encoders to be connected without accessory boards. As a three-phase module for synchronous and asynchronous motors, the inverter delivers balanced output currents and supports controlled motor operation across a wide speed range.

In this revision, the drive includes no additional functions, so its feature set remains focused on the core power conversion and motion-control tasks. The unit is part of the Servodyn-D series, which uses a common mechanical format and shared DC bus arrangement with related modules in the same platform. It can operate as a master/slave drive, allowing the module either to control its own axis directly or to follow another drive during coordinated motion. This arrangement supports synchronized operation in systems where multiple axes must respond together while remaining connected through a common power structure.