Product Description:

The DM 8K 1101-D is a servo drive module manufactured by Bosch Rexroth Indramat for the DM Servo Drives series. It functions as the power and control stage between a motion controller and synchronous motors in automated machinery, converting command data into regulated three-phase output while monitoring current, voltage, and position feedback. By integrating into SERCOS networks, the unit supplies tightly synchronized torque and speed control needed for packaging lines, pick-and-place axes, and similar industrial motion tasks.

The power section is tied to a DC bus of 670 VDC, giving the drive the voltage headroom required for rapid motor acceleration and energy recovery. During closed-loop operation, the continuous phase current limit is 3.6 Arms, which sets the thermal load the heat sink must dissipate under rated switching conditions. For short dynamic bursts, the current ceiling rises to 10 Arms, allowing extra torque for indexing or vertical loads without exceeding device I²t limits. All power transistors are clocked at 8 kHz, a switching frequency that balances current ripple against switching loss. An IP20 housing shields live conductors while remaining compact for cabinet installation, and the SERCOS fiber-optic interface eliminates ground loops while carrying real-time drive status to the master.

The output stage delivers three-phase 400 V to the motor terminals, with current derated by 0.1 A per kelvin once ambient temperatures exceed 45 °C. Internal logic and encoder supplies draw only 0.89 A from the separate 24 V service line, minimizing control panel load. The aluminum chassis weighs 6.0 kg and occupies a 50 mm module width, simplifying side-by-side mounting of multi-axis racks. Vibration tests certify shock survival up to 15 g, and maximum power loss is limited to 96.5 W, so cabinet airflow requirements stay moderate. Position accuracy is supported by 20-bit single-turn and 32-bit multi-turn counters, completing the feedback channel for precise motor position tracking.