KSM02.1B-041C-42N-S1-HG2-ET-L3-D7-NN-FW by Bosch Rexroth Indramat

The KSM02.1B-041C-42N-S1-HG2-ET-L3-D7-NN-FW is manufactured by Bosch Rexroth Indramat as part of the KSM Motor Integrated Servo Drives series. This design combines the drive electronics and servomotor in a single housing, reducing cabinet wiring in distributed automation systems. It is part of Series 2 and carries design version 1 with the standard mechanical option. The unit has motor size 041 and length C, giving it a compact footprint for machine axes with limited installation space. A plain shaft with an integral shaft seal allows direct coupling while limiting lubricant leakage and the entry of contaminants in light-duty machinery.

The drive section operates from a DC 750 V bus, enabling direct connection to compatible regenerative supply networks. Power, signal, and safety conductors are routed through a hybrid connector, so only one cable is required between the cabinet and actuator. Heat is removed by natural convection, eliminating the need for forced-air components in sealed enclosures. Motion commands and diagnostic data reach the controller over Multi-Ethernet, allowing the axis to communicate through EtherNet/IP, PROFINET, or EtherCAT without hardware changes. Integrated Safe Torque Off (STO) disables motor torque by deactivating the gate drivers when the safety channel is triggered. This safety function removes the need for external contactors in applications that meet the appropriate system requirements.

Rotor position is measured with a Hiperface optical encoder that generates 128 signal periods per revolution. Its single-turn format supplies absolute position data for one mechanical revolution, supporting accurate position feedback immediately after startup. An electrically released holding brake rated for DC 24 V clamps the shaft during a power loss, helping prevent vertical loads from drifting. The stator uses winding code 42, matching its electrical characteristics to the current requirements of the basic performance level. Optical position sensing supports closed-loop control in moderate-speed packaging machines, material-handling equipment, and small assembly stations. The holding brake also secures stationary loads when the drive cannot provide active motor torque.