KSM02.1B-041C-42N-M1-HG2-ET-L3-D7-TO-FW by Bosch Rexroth Indramat

The KSM02.1B-041C-42N-M1-HG2-ET-L3-D7-TO-FW is a motor-integrated servo drive manufactured by Bosch Rexroth Indramat for the KSM Motor Integrated Servo Drives series. It combines a servo motor and drive electronics in one housing, allowing the unit to be mounted directly on a machine axis without a separate drive enclosure near the motor. This arrangement reduces the amount of wiring between the motor and control system while placing power conversion, feedback processing, and safety functions close to the mechanical load. The drive supports precise position, speed, and torque control in automated packaging equipment, pick-and-place cells, and conveyor systems.

The drive section operates from a DC 750 V supply bus that can be shared among multiple axes in a modular machine. Heat from the power stage is dissipated through natural convection, so installation must provide unobstructed airflow around the housing. Power, feedback, and network lines are routed through a single hybrid connector, reducing the number of separate cable connections required on the machine. Functional safety is provided by an integrated Safe Torque Off (STO) circuit, which prevents the motor from producing torque without relying on mechanical relays. Motion commands and diagnostic data are exchanged through the Multi-Ethernet interface, which supports selectable industrial Ethernet communication. The drive has a Basic performance level for applications that require standard servo control without expanded input and output functions.

Rotor position feedback is generated by an optical encoder that produces 128 signal periods per revolution. Its multi-turn absolute encoder with Hiperface feedback retains position information across power cycles, reducing the need for a new homing sequence after startup. An electrically released holding brake operates from a 24 V DC supply and keeps stationary loads secured when the brake is not energized. The motor has a plain shaft with a shaft seal, which helps prevent lubricant and contaminants from reaching the bearing area. Motor size 041, length code C, and winding code 42 identify the physical frame and electromagnetic configuration used in this model. The unit is design version 1 and belongs to internal series 2.