KSM02.1B-041C-42N-M3-HG0-ET-L3-D7-ES-FW by Bosch Rexroth Indramat

The KSM02.1B-041C-42N-M3-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. By combining drive electronics with a synchronous motor, it mounts directly on the machine frame and removes the need for a separate axis drive in the control cabinet. The unit supports decentralized automation in which compact axes perform positioning, speed, and torque control close to the load.

The drive receives power from a DC bus rated at DC 750 V, and heat is dissipated through natural convection, so no cooling fans are required. Feedback is provided by a Hiperface encoder that uses capacitive sensing and delivers 16 signal periods per revolution for precise position data. Its multi-turn absolute tracking retains position information across multiple shaft revolutions and eliminates the need for homing routines after startup. The internal safety circuit provides Safe Torque Off (STO), permitting motor torque to be disabled without external contactors. A plain shaft transmits torque directly to gearing or couplings, while the installed shaft seal helps limit the entry of contaminants. The Multi-Ethernet communication option supports external master connections through PROFINET, EtherNet/IP, or EtherCAT, allowing the communication protocol to match the machine controller.

Power, signal, and brake conductors are routed through a single hybrid connector, reducing the number of separate cable connections required at the motor. The motor section has a frame size of 041 and length code C, providing a compact housing for decentralized machine axes. Winding code 42 identifies the stator winding used with the integrated inverter. The unit has design version 1, a Basic performance level, and Series 2. It operates without a holding brake, making it suitable for axes where stationary loads are retained by external mechanical clamping or do not require powered holding torque.