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

The KSM02.1B-041C-42N-M1-HP2-ET-NN-D7-NN-FW motor-integrated servo drive is produced by Bosch Rexroth Indramat within the KSM Motor Integrated Servo Drives series. By incorporating drive electronics directly on the motor frame, the unit combines motion control, a power stage, and feedback in one enclosure for decentralized automation. It is design version 1 and belongs to the Basic performance level, making it suitable for light-to-medium-duty axes where cabinet space is limited. Operation from a shared DC bus supports high-density machine layouts and reduces the amount of wiring required between the control cabinet and the motor.

The drive accepts a supply voltage of up to 750 V DC from a central bus, and its internal power circuits modulate this voltage for torque production without an intermediate AC stage. Field wiring is reduced through a single hybrid connector that carries power, communication signals, and auxiliary power, so a separate feedback cable is not required. Motor temperature is controlled through natural convection; the housing dissipates heat into the ambient air without fans or liquid-cooling circuits. Position feedback is transmitted through a Hiperface interface. The optical encoder provides 128 signal periods per revolution for fine interpolation by the drive controller.

Absolute rotor position is retained by a multi-turn absolute encoder, allowing operation to resume after a power cycle without a homing routine. An electrically released brake engages whenever control power is removed to hold static loads. Its coil operates from a dedicated 24 V DC supply that can be switched independently of the main bus. Motion commands and diagnostic data are transmitted over Multi-Ethernet, enabling integration with EtherNet/IP, PROFINET, or EtherCAT networks. The motor uses a shaft with a keyway for positive mechanical engagement, while a shaft seal helps prevent contaminants from entering the housing. The motor has size 041 and length C. It uses winding code 42, belongs to Series 2, and has the standard design option.