Product Description:

The DMA 85B 7101-D drive module is produced by Bosch Rexroth Indramat and belongs to the DMA Servo Drive Modules series. It is a modular three-phase power section intended to control synchronous and asynchronous motors within multi-axis automation racks. The format lets it serve as one axis in a larger drive system rather than as a stand-alone controller. By converting line energy into regulated three-phase output, the unit supplies torque and speed commands to connected servomotors while coordinating with a shared DC bus and a higher-level motion controller.

Heat removal relies on backplane air cooling, meaning fan-assisted airflow is drawn across the rear heat sink when the module is inserted into a Servodyn rack. The integrated encoder channel is provided through a Standard Interface, and this feedback port accepts typical incremental or absolute signals from the motor for closed-loop positioning. Fieldbus communication is enabled by CANrho, which permits decentralized parameter exchange with neighboring drives over the proprietary CAN layer. Housing width is limited to 100 mm, so multiple axes can be installed side by side without exceeding standard cabinet pitch. Internally, the power stage is a 3-phase module for synchronous and asynchronous motors, which means the inverter can operate both permanent-magnet and induction machines from the same supply.

The module has no additional functions, so motion features are handled by the central controller rather than inside the drive. Within system inventories, it is cross-referenced under the Servodyn-D series, which keeps parameter handling and diagnostics aligned with other members of that platform. This build is the standard variant, so terminal layout and basic operating behavior follow the common version used in the range. That arrangement leaves application-specific motion logic to the main controller while the module focuses on power conversion and closed-loop motor operation.