KSM02.1B-041C-42N-M1-HP0-ET-S3-D7-NN-FW by Bosch Rexroth Indramat

The KSM02.1B-041C-42N-M1-HP0-ET-S3-D7-NN-FW is a motor-integrated servo drive manufactured by Bosch Rexroth Indramat for the KSM Motor Integrated Servo Drives series. This compact unit combines a synchronous motor with drive electronics in one housing, reducing cabinet space and the amount of wiring required for distributed automation. Within a multi-axis machine, it regulates position, velocity, and torque directly at the axis. Local regulation can reduce communication delays between the controller and the motor while allowing the system to coordinate precise motion across packaging, handling, and assembly equipment.

This basic-performance unit operates from a DC 750 V bus and receives power, control, and brake conductors through a single hybrid connector. Heat generated by the embedded inverter is removed through natural convection, so the unit does not require a dedicated cooling fan. Motion feedback comes from an optical encoder that provides 128 signal periods through a Hiperface link. Its multi-turn absolute design retains shaft position information after power is removed, reducing the need for a new homing cycle after startup. The unit includes Safe Motion without SBC for certified stop and speed-monitoring functions, but it does not provide Safe Brake Control. The motor has length code C and a standard mechanical design in version 1. A holding brake is not installed, so drive torque or an external clamping device must hold the load when necessary.

Network communication is handled by Multi-Ethernet, which supports integration with EtherNet/IP, PROFINET, or EtherCAT networks as required by the control system. Torque is transmitted through a shaft with a keyway and shaft seal, providing positive engagement with a compatible coupling while helping limit contaminant ingress. The frame corresponds to motor size 041, offering a compact balance of continuous torque and rotor inertia for medium-duty axes. Its electrical characteristics follow winding code 42, matching the motor's resistance and inductance to compatible drive operation. The internal safety logic is part of Series 2, while the standard option set omits additional specialized equipment.