KSM02.1B-041C-42N-M1-HP2-ET-S3-D7-NN-FW by Bosch Rexroth Indramat

The KSM02.1B-041C-42N-M1-HP2-ET-S3-D7-NN-FW is a motor-integrated servo drive produced by Bosch Rexroth Indramat for the KSM Motor Integrated Servo Drives series. It combines the power stage, control electronics, and servo motor in one enclosure. This integrated format supports decentralized automation by reducing cabinet wiring and simplifying installation on conveyors, pick-and-place gantries, and assembly cells. Mounting the drive at the axis also shortens the connections between the electronics and motor, which can simplify machine layouts where enclosure space is limited.

The drive accepts a bus voltage of DC 750 V, matching the intermediate circuits used by compatible Rexroth supplies. Power, Ethernet, and safety wiring enter through a single hybrid connector, so only one cable is required between the motor and control panel. Feedback comes from a multi-turn absolute optical encoder with a Hiperface interface that provides 128 signal periods per revolution for precise position interpolation. Cooling relies on natural convection, and the fanless aluminum housing requires adequate open space for heat dissipation. Motion commands travel over Multi-Ethernet, allowing the unit to communicate through PROFINET, EtherNet/IP, EtherCAT, or Sercos III without separate option cards. The motor has length C and winding code 42, providing torque capacity suited to mid-range axes. The drive belongs to Series 2 and has a basic performance level.

The mechanically integrated brake uses an electrically released mechanism powered by 24 V DC. When power is removed, the brake locks the shaft to hold the connected load. Functional safety is provided by Safe Motion, which supervises speed and position without a separate Safe Brake Control circuit. Torque is transmitted through a shaft with a keyway, while a dedicated shaft seal protects the axial opening from contaminants. The motor has a frame size of 041, making it suitable for compact machines that require direct-drive torque. Its standard construction uses Design Version 1 within the Series 2 platform.