Product Description:

The DMA 085B 5111-D is a three-phase servo drive module from the DMA Servo Drive Modules series produced by Bosch Rexroth Indramat. It is intended to regulate synchronous and asynchronous motors on a single axis by receiving 24 V control signals from the machine controller and feeding the appropriate current to the motor windings. Integrated one-axis positioning makes the unit suitable for indexing tables, pick-and-place arms, and similar motion tasks inside an automation cell where compact backplane-mounted drives simplify cabinet wiring.

During closed-loop operation, the module delivers a continuous phase current of 47 A(rms). In open-loop or startup conditions, it can supply up to 86 A(rms) for short intervals. When ambient temperature rises above 45 °C, the available current decreases by 1.25 A/K, a linear derating that helps keep semiconductor junctions within safe limits. Internal switching losses and a pair of backplane air-cooling fans generate a maximum of 380 W of heat that must be exhausted by the cabinet ventilation system. The electronics draw 1.35 A from the external 24 V utility supply, and command values arrive through the setpoint interface that accepts 24 V logic. A depth of 288 mm allows the unit to fit in shallow enclosures while still leaving space behind the RMB/DM backplane for airflow.

The front panel rises to 504 mm, providing room for two fans and status LEDs while staying within standard rack heights. With a mass of 11.5 kg, the module remains manageable for cabinet installation and handling. Motor feedback channels accept STG or MTG encoders. Single-turn position is resolved to 20 bits, and the built-in counter stores multi-turn data at 32 bits, 4096 rev, absolute so position is retained after power loss. The standard control electronics manage current loops at 4 kHz, supervise thermal sensors, and coordinate the one-axis positioning function.