KSM02.1B-071C-35N-S1-HG2-ET-L3-D7-NN-FW by Bosch Rexroth Indramat

The KSM02.1B-071C-35N-S1-HG2-ET-L3-D7-NN-FW is a motor-integrated servo drive manufactured by Bosch Rexroth Indramat within the KSM Motor Integrated Servo Drives series. The device combines a permanent-magnet synchronous motor, power electronics, and a fieldbus interface in one enclosure, delivering decentralized position and speed control for packaging, material-handling, and assembly lines. Locating the controller directly on the axis shortens feedback paths, lowers panel heat, and simplifies the implementation of distributed automation systems.

The drive is supplied from a direct-current link of DC 750 V, so it connects to a shared intermediate circuit rather than individual mains feeders. Heat generated by the embedded inverter is removed through natural convection, eliminating the need for forced-air ducts or liquid cooling plates. Communication with higher-level PLCs is handled by the Multi-Ethernet interface, which supports common industrial Ethernet protocols through automatic protocol detection. Rotor position feedback enters the control loop over a Hiperface serial channel. The encoder produces 128 signal periods per mechanical revolution, providing sufficient resolution for precise velocity regulation and smooth torque production.

The feedback system uses optical scanning, which is resistant to magnetic stray fields often found near power conductors. A spring-applied brake that operates at DC 24 V is electrically released and arrests the shaft when power is removed, allowing vertical loads to be held without external clamps. Functional safety is supported by the integrated Safe Torque Off (STO) channel, which disables motor torque in response to a category 0 stop command. The motor has a frame code of 071, which corresponds to its flange and stator stack dimensions. It also has a plain shaft with a shaft seal, a hybrid power-and-signal connector, and winding code 35.