KSM02.1B-061C-35N-S1-HG2-ET-L3-D7-TO-FW by Bosch Rexroth Indramat

The KSM02.1B-061C-35N-S1-HG2-ET-L3-D7-TO-FW is a motor-integrated servo drive from Bosch Rexroth Indramat within the KSM Motor Integrated Servo Drives series. By combining drive electronics and a synchronous motor in one housing, it simplifies cabinet wiring and reduces installation space in distributed automation cells. The unit works as a decentralized axis that accepts real-time motion commands over Ethernet networks and delivers torque directly to machinery without requiring a separate inverter cabinet.

The power stage accepts a nominal DC 750 V link voltage, matching Rexroth supply modules used in multi-axis machines. Thermal energy is removed through natural convection, so no fans or liquid loops are required when the housing is installed in open air. A single hybrid connector carries the DC bus, safety I/O, and feedback signals, minimizing the cable count on gantries. Command and diagnostic traffic are handled by an integrated switch that supports Multi-Ethernet protocols, allowing the unit to join EtherNet/IP, PROFINET, or EtherCAT networks. Functional safety is provided by Safe Torque Off (STO), which uses dual-channel logic to de-energize the inverter stage and remove torque immediately. The 061 frame, length C, and winding code 35 correspond to the unit's continuous output class.

Position feedback is provided through a Hiperface interface that works with an optical encoder generating 128 signal periods per revolution. This single-turn device supports absolute positioning within one rotation, eliminating the need for a homing cycle after power is restored. For static load holding, the integrated brake is electrically released and engages automatically whenever the control line is opened. Its coil is rated at DC 24 V for compatibility with standard safety relays. A plain shaft with a shaft seal helps prevent lubricant loss and the entry of dust. The unit has a basic performance level, design version 1, and series 2 designation.