Product Description:

The DMA 85B 6311-D is a drive module produced by Bosch Rexroth Indramat and supplied within the DMA Servo Drive Modules series. Designed for cabinet mounting, the unit forms the power and control core for one motor axis in automated machinery. As a servo drive module, it supplies regulated three-phase power to synchronous and asynchronous motors while processing feedback from the connected encoder. In plant automation lines, it translates motion commands from higher-level controllers into precise torque and speed at the motor shaft. This arrangement allows a single module to manage current delivery, speed regulation, and response to changing load conditions within a compact cabinet footprint.

To perform these duties, the module uses backplane air cooling, so heat is carried away through the rear bus bar rather than by external fans, which helps keep the control cabinet sealed. Position data reaches the control electronics through a Resolver, a transformer-based sensor that withstands electrical noise and high operating speeds. For fieldbus communication, the unit offers PROFIBUS-DP, allowing cyclic data exchange with PLCs at up to 12 Mbit/s. Installation space is conserved because the housing measures 100 mm in width, which permits dense stacking of neighboring modules on the mounting rail. The embedded one-axis positioning function lets the module handle single-axis motion tasks without a separate motion card.

The unit is a three-phase module for synchronous and asynchronous motors, so it can provide both torque-mode and velocity-mode output without additional converters. It carries the Servodyn-D series designation, indicating compatibility with drive controllers and I/O modules that share the same bus structure. The drive is offered as a standard variant, so its hardware layout follows the default configuration used for this product line. This layout supports straightforward integration into systems that use the same electrical and communication platform.