Product Description:

Bosch Rexroth Indramat's DMA 004A 1101-D belongs to the DMA Servo Drive Modules series and is supplied as a three-phase module for synchronous and asynchronous motors used in industrial automation. The unit receives velocity or torque commands over the SERCOS setpoint interface and executes single-axis positioning through its integrated control section, so motion control and power conversion are handled in one module. A standard encoder interface accepts motor feedback for closed-loop operation, while backplane air cooling moves heat away from the power electronics without additional fans at the module itself. This layout supports compact installation in multiaxis cabinets.

The power section operates from a nonregulated DC link of 715 VDC and maintains a regulated bus around 670 VDC; this voltage range influences motor speed potential and the operating range of connected inverters. At a 4 kHz switching frequency, the module can deliver up to 5.6 Arms in open-loop conditions, enough for medium-frame servomotors, while cabinet dissipation remains limited to 94.3 W during operation. Control electronics and relay coils draw only 1.0 A from the 24 VDC auxiliary supply, which keeps the low-voltage support load modest.

Thermal headroom above 45 °C decreases by 0.15 A/K, so current capacity must be reduced as ambient temperature rises. When the carrier frequency is raised to 8 kHz for lower motor acoustic noise, the closed-loop current cap is 3.3 Arms. The housing weighs 7.3 kg and measures 50 mm in width, 504 mm in height, and 288 mm in depth, allowing dense stacking when 100 mm of clearance is left above and below for airflow. Air-backplane cooling channels route exhaust toward the cabinet rear, and the internal loss values keep enclosure temperatures within component limits during continuous single-axis operation.