KSM02.1B-041C-42N-M1-HP0-ET-L3-D7-TO-FW by Bosch Rexroth Indramat

The KSM02.1B-041C-42N-M1-HP0-ET-L3-D7-TO-FW is produced by Bosch Rexroth Indramat and belongs to the KSM Motor Integrated Servo Drives series. As a motor-integrated servo drive, it combines a permanent-magnet servomotor and inverter electronics in a single housing, providing a compact axis for decentralized motion control. This arrangement is suitable for automated packaging, material-handling, and assembly lines where distributed drives can reduce cabinet wiring and simplify machine layouts. The unit receives power from a 750 V DC intermediate circuit, which supplies the integrated inverter and motor from a shared DC bus.

Power and fieldbus signals pass through a single hybrid connector, simplifying daisy-chain installation and reducing the number of separate cable connections. Thermal energy is removed through natural convection, so the housing requires unobstructed airflow but does not need a fan or liquid-cooling loop. The master communication interface is Multi-Ethernet, and its output coupling can pass Sercos III, PROFINET, EtherNet/IP, or EtherCAT communication to the next drive. Position feedback provides 128 signal periods per mechanical revolution, giving the control loop detailed rotor-position information. Optical sensing and multi-turn absolute memory preserve position data after the system is powered down. The feedback connection uses the Hiperface protocol to exchange absolute position and diagnostic data with the integrated controller. The unit has design version 1, winding code 42, a basic performance level, and Series 2 construction.

Functional safety is provided by an integrated Safe Torque Off (STO) circuit, which removes gate-drive energy when the safety function is activated. Mechanical torque is transferred to the load through a shaft with a keyway, allowing positive engagement with a compatible coupling or driven component. An integral shaft seal helps prevent lubricant from escaping while limiting the entry of dust around the shaft interface. The unit does not include a holding brake, so an external restraint is required when a vertical load must remain stationary without motor torque. Frame code 041 and motor length C provide a compact mechanical envelope for decentralized machine axes. The cooling fins are integrated into the housing to dissipate heat generated by the motor and inverter during operation.