KSM02.1B-041C-42N-S3-HG0-ET-L3-D7-ES-FW by Bosch Rexroth Indramat

The KSM02.1B-041C-42N-S3-HG0-ET-L3-D7-ES-FW is a motor-integrated servo drive manufactured by Bosch Rexroth Indramat for the KSM Motor Integrated Servo Drives series. It combines a 041-frame permanent-magnet motor, drive electronics, and a fieldbus interface in a single enclosure, allowing installation on the machine frame instead of inside a cabinet. The product regulates torque and position at the axis, reducing cable runs and simplifying multi-axis layouts in industrial automation systems such as pick-and-place stations and small conveyor modules.

Power for the axis is supplied by a DC 750 V source, allowing the drive to connect directly to a common DC bus that links multiple KSM nodes. Heat produced by the electronics is removed through natural convection, eliminating the need for forced-air fans. A single hybrid connector carries DC power, safety signals, and feedback, minimizing wiring effort. Position feedback is processed through the Hiperface serial interface. Its capacitive, single-turn encoder delivers 16 signal periods per mechanical revolution, providing fine commutation data for smooth motion. This basic-performance model is built to Series 2 and design version 1, and it uses the C length option to match the frame while keeping mass low. The motor has a plain shaft with an internal shaft seal that helps prevent lubricant from escaping during operation.

Machine controllers communicate through a Multi-Ethernet port that supports Sercos III, EtherNet/IP, PROFINET, and EtherCAT through the external master communication option. Functional safety is provided by the certified Safe Torque Off (STO) channel, which disables drive output without interrupting control power. Mechanical holding must be provided externally because the motor is supplied without a holding brake. The electromagnetic design uses winding code 42, which establishes the phase resistance and inductance used by the drive. Decentralized mounting places the drive close to the load, while the supported safety channel allows controlled torque removal in compact machinery.