Product Description:

The DM 45K 4101-D is a servo drive module produced by Bosch Rexroth Indramat within the DM Servo Drives series. Installed inside control cabinets, the unit supplies regulated power and closed-loop control signals to synchronous or asynchronous motors used in automated machinery, conveyors, and processing lines. By linking the motion controller to the motor windings, it translates velocity or torque commands into precise current output, forming a core element of industrial automation architectures. The module is intended for coordinated axis control where repeatable motor response is required during acceleration, speed regulation, and load changes.

This module relies on air cooling, so internal heat is removed by airflow across the heat sink. A nonregulated DC link voltage of 715 VDC is present at the power bus, providing energy storage for rapid torque transients. For feedback, the drive accepts an STG or MTG encoder interface, allowing use with either single-turn or multi-turn transducers. The encoder connection lets the control loop track shaft position and speed without a separate feedback processor. Closed-loop rated current reaches 23.5 Arms when the pulse-width modulation carrier is 4 kHz, while the open-loop limit rises to 47.5 Arms for brief overloads. Compact mechanics keep the footprint to 430 mm in height and 75 mm in width, enabling dense multi-axis rack layouts. Commands enter through an analog setpoint interface, and internal conversion is handled with 16 bit resolution to preserve fine speed increments during interpolation.

A regulated DC link of 670 VDC holds the bus at a steady level to reduce speed ripple during load changes, and total power loss is limited to 205 W, which affects cabinet ventilation requirements. Logic electronics draw only 1.4 A from the 24 V supply, reducing auxiliary power demands. The housing weighs 6.7 kg, which supports stable mounting and helps limit vibration. At an 8 kHz switching frequency, the drive can supply 35 Arms peak and 16.5 Arms continuously, supporting motors that need lower audible noise. This operating mode can be useful where reduced switching noise is preferred over higher continuous current at a lower carrier frequency.