KSM02.1B-041C-42N-M1-HG0-ET-NN-D7-NN-FW by Bosch Rexroth Indramat

The KSM02.1B-041C-42N-M1-HG0-ET-NN-D7-NN-FW is a motor-integrated servo drive manufactured by Bosch Rexroth Indramat as part of the KSM Motor Integrated Servo Drives series. By combining the power stage, control electronics, and synchronous motor in one enclosure, the unit eliminates the need for a remote cabinet-mounted amplifier and shortens installation time in automated handling, packaging, and assembly lines. The distributed architecture places individual motion axes close to their loads, minimizing wiring distances and reducing the amount of equipment required in the central cabinet.

Electrical power enters the unit through a hybrid connector that carries DC power, control signals, and protective earth through one molded interface. The drive accepts a bus voltage of DC 750 V, allowing it to operate on an intermediate circuit shared by other compatible Rexroth inverters. Heat generated by the embedded electronics is removed through natural convection, so the unit does not require a cooling fan. Rotor position is reported to the control loop by a Hiperface encoder that delivers 128 signal periods per mechanical revolution, supporting smooth low-speed motion and precise electronic commutation. The size 041 stator has a C-length frame and winding code 42, providing torque and speed characteristics suited to small indexing axes. The module is design version 1, has a basic performance level, and belongs to series 2. It is supplied without a holding brake, so an external holding mechanism is necessary when a stationary load must remain securely positioned after power is removed.

The feedback system uses an optical scanning method and supports multi-turn absolute position tracking, preserving position information across power cycles. For network integration, the drive provides a Multi-Ethernet interface that can use PROFINET, EtherNet/IP, or EtherCAT through software selection. Mechanical coupling uses a plain shaft with a shaft seal, allowing direct connection to compatible couplings while helping protect the bearing area from oil splash. Integrated control electronics process encoder data locally, allowing the motor and drive functions to operate within the same compact housing.