KSM02.1B-071C-35N-S3-HP2-ET-L3-D7-TO-FW by Bosch Rexroth Indramat

The KSM02.1B-071C-35N-S3-HP2-ET-L3-D7-TO-FW is an integrated servo drive produced by Bosch Rexroth Indramat for the KSM Motor Integrated Servo Drives series. By combining the power electronics, feedback interface, and synchronous motor in one housing, this unit simplifies cabinet wiring for distributed motion axes in industrial automation cells. It is part of Series 2 and provides basic-level performance for positioning or speed-controlled tasks that require compact installation on the machine frame.

The unit operates from a DC 750 V supply bus, enabling long cable runs without significant voltage drop. Heat is removed through natural convection, so no external fan or liquid circuit is needed, and flexible mounting orientations can be used. Power, control, and auxiliary lines terminate on a single hybrid connector, which reduces the number of separate connections. Rotor position is reported through a Hiperface interface that transmits absolute position at startup and real-time incremental data during motion. The encoder uses a capacitive measuring principle that tolerates dust and vibration better than optical discs and provides a resolution of 16 signal periods.

The shaft has a keyway and a shaft seal, while motor length C keeps the overall depth moderate. An electrically released holding brake engages automatically when power is removed and operates through a dedicated DC 24 V coil, allowing vertical axes to remain locked without drive torque. The integrated Safe Torque Off (STO) function disables torque-producing motor energy without requiring the main power circuit to be opened. The compact frame has motor size 071 and uses winding code 35. Its Multi-Ethernet communication interface supports protocol-independent connectivity over Sercos III, EtherNet/IP, or PROFINET. The unit uses design version 1 of the platform.