KSM02.1B-061C-35N-M1-HP0-ET-L3-D7-TO-FW by Bosch Rexroth Indramat

The KSM02.1B-061C-35N-M1-HP0-ET-L3-D7-TO-FW is a motor-integrated servo drive produced by Bosch Rexroth Indramat for the KSM Motor Integrated Servo Drives series. The self-contained motor and drive assembly mounts directly on machinery, eliminating the need for a separate cabinet inverter at the axis. Its closed-loop control supports precise motion in production lines, packaging systems, and material-handling equipment. This decentralized arrangement also shortens the power and communication connections between the controller and each machine axis.

The unit receives power from a 750 V DC bus and communicates through a Multi-Ethernet master interface with multi-Ethernet output coupling. A hybrid connector carries DC power, safety I/O, and fieldbus signals through a single connection, reducing the number of separate cables required at the motor. Cooling relies on natural convection, so the sealed enclosure does not require a fan or liquid-cooling circuit. An installed shaft seal helps prevent dust and fluid from reaching the internal bearings. Motion feedback is generated by an optical encoder that uses the Hiperface interface and provides 128 signal periods per revolution for accurate commutation. The drive has motor size 061, frame length C, and winding code 35, providing a compact arrangement for decentralized motion axes. It is design version 1 and Series 2, and the HP0 option indicates that it does not include an internal holding brake.

Functional safety is provided by Safe Torque Off (STO), which removes torque-producing energy from the motor without interrupting fieldbus communication. The encoder is a multi-turn absolute device that retains the revolution count when DC power is unavailable, reducing the need for homing after an emergency stop. Mechanical output is transferred through a shaft with a keyway, providing positive engagement with compatible couplings, pulleys, or gearboxes. The unit has a Basic performance level for standard positioning and velocity-control applications. Loads that must remain stationary after power removal require an external brake, mechanical lock, or another suitable holding method. The integrated drive electronics regulate motor current locally while exchanging commands and operating data with the higher-level controller over the network.