KSM02.1B-041C-42N-S1-HP2-ET-L3-D7-NN-FW by Bosch Rexroth Indramat

The KSM02.1B-041C-42N-S1-HP2-ET-L3-D7-NN-FW is a motor-integrated servo drive produced by Bosch Rexroth Indramat for the KSM Motor Integrated Servo Drives series. By combining power electronics, feedback circuitry, and an AC servo motor in one IP-rated housing, the device reduces the need for separate drive cabinets and simplifies installation on modular machinery. It is intended for decentralized axis control in packaging, pick-and-place, and small material-handling equipment where compact footprints and straightforward setup are important.

Power for the axis is supplied at DC 750 V, allowing multiple drives to share a common bus and regenerative energy. Command, diagnostic, and safety data are exchanged over Multi-Ethernet, giving the unit protocol flexibility among EtherNet/IP, PROFINET, and EtherCAT without requiring hardware changes. Thermal energy leaves the housing through natural convection, so no fans or filters are required. Integrated safety includes Safe Torque Off (STO), which cuts motor energy through redundant channels and removes the need for external safety relays. All power, signal, and brake conductors are routed through a single hybrid connector, reducing wiring time and minimizing potential connection errors during service.

The holding mechanism is an electrically released brake that engages when its coil is not energized. It unlocks when DC 24 V is applied, allowing controlled motion after the safety system releases the axis. Rotor position is monitored through a Hiperface optical encoder that produces 128 signal periods per revolution and provides single-turn absolute feedback for accurate indexing. The mechanical interface uses frame size 041 and includes a keyed shaft with a shaft seal that helps protect against contamination. The C-length stator, winding code 42, basic performance level, and standard design version 1 suit applications that require moderate torque density with passive cooling.