KSM02.1B-041C-42N-S1-HP0-ET-L3-D7-NN-FW by Bosch Rexroth Indramat

The KSM02.1B-041C-42N-S1-HP0-ET-L3-D7-NN-FW is a motor-integrated servo drive produced by Bosch Rexroth Indramat within the KSM Motor Integrated Servo Drives series. It combines a brushless servo motor, drive electronics, and a network interface in a single enclosure, allowing motion axes to be distributed without large control cabinets. This arrangement supports compact conveyors, pick-and-place heads, and format-adjustment stations that require precise position control with limited wiring.

The drive operates from a bus voltage of DC 750 V, providing the DC link required for its internal inverter stage. Power, feedback, and safety lines are routed through a single hybrid connector, reducing the installation to one pluggable lead. Heat dissipates through natural convection, so no fans are required. Command traffic reaches the unit over a Multi-Ethernet stack that supports PROFINET, EtherNet/IP, and other Ethernet-based fieldbuses without additional hardware. During an emergency stop, the integrated Safe Torque Off (STO) channel disables motor power at the gate level, providing a basic safety function without external relays.

Rotor position is reported through a Hiperface interface that carries analog sine-cosine signals and digital memory data. The encoder delivers 128 signal periods per revolution, and its optical sensing principle maintains accuracy across the operating temperature range. Because the transducer is a single-turn device, absolute position information is retained over one mechanical rotation. Mechanical torque passes to the load through a shaft with a keyway, allowing direct coupling to pulleys or gearboxes. A shaft seal protects the bearing set from contaminants. The unit is supplied without a holding brake, so vertical axes must secure loads by other means. Design version 1, the standard option set, and the 041 C motor geometry provide a balanced combination of speed and torque for general automation applications.