KSM02.1B-041C-42N-M1-HG2-ET-NN-D7-TO-FW by Bosch Rexroth Indramat

The KSM02.1B-041C-42N-M1-HG2-ET-NN-D7-TO-FW is a motor-integrated servo drive produced by Bosch Rexroth Indramat for the KSM Motor Integrated Servo Drives series. This Series 2, Version 1 unit combines a size 041 stator with a length C magnetic stack and winding code 42 to provide the torque and speed characteristics required in distributed automation. The unit has a Basic performance level and does not include integrated safety technology. It mounts directly on the machine frame to reduce cabinet wiring while delivering closed-loop axis control for packaging, handling, and assembly lines.

The drive operates from a DC 750 V bus and dissipates heat through natural convection, eliminating the need for forced-air or liquid cooling. Rotor position is measured by an optical encoder that communicates over the Hiperface interface. Within each mechanical revolution, the sensor provides 128 signal periods of feedback, while its multi-turn absolute capability tracks position across multiple revolutions without battery backup. Optical scanning improves immunity to stray magnetic fields and supports precise commutation at low speeds. The cooling method allows the drive to operate in confined installations where cabinet-mounted inverters would require additional wiring and space.

Field installation is simplified by a hybrid connector that carries DC power, feedback signals, and drive communication through one plug. Commands and diagnostic data travel over Multi-Ethernet, and the housing includes a Multi-Ethernet output coupling so additional KSM axes can be connected in a daisy chain. Axis holding is provided by an electrically released brake that engages automatically when control power is absent. Its coil is energized with DC 24 V during normal operation. Mechanical power is delivered through a plain shaft, and an installed shaft seal helps prevent contaminant entry and lubricant leakage during washdown or operation in mist-laden areas.