KSM02.1B-041C-42N-S3-HG0-ET-NN-D7-ES-FW by Bosch Rexroth Indramat

The KSM02.1B-041C-42N-S3-HG0-ET-NN-D7-ES-FW is a motor-integrated servo drive manufactured by Bosch Rexroth Indramat for the KSM Motor Integrated Servo Drives series. By combining a permanent-magnet motor, power electronics, and fieldbus interfaces in one housing, it delivers decentralized axis control for machines that distribute drives along gantries, tooling heads, or conveyor modules. This arrangement reduces cabinet wiring and places closed-loop torque and position regulation directly at the load. A Multi-Ethernet interface links the unit to centralized motion controllers for coordinated machine operation.

Power for the drive section is supplied from a DC bus at 750 V, enabling rapid current increases during dynamic movements. The stator is cooled by natural convection, so no fans or liquid circuits are required. Motor, DC, and Ethernet conductors terminate on a single hybrid connector that carries power and communication through one locking plug. Rotor position is measured with a Hiperface encoder that outputs 16 signal periods per revolution. The encoder uses a capacitive sensing principle, which provides reliable feedback in the presence of shock and oil. Its single-turn range provides absolute position information within one mechanical revolution of the shaft.

The electromechanical section uses the compact size 041 frame with winding code 42. This combination establishes the torque constant, resistance, and thermal characteristics of the motor. The unit has a plain shaft that transmits torque directly, while a shaft seal helps keep lubricant inside the front bearing and contaminants away from internal components. There is no holding brake, so applications that must maintain position after power is removed require an external clamping device. Safety-related stop and monitoring functions are not integrated, so the control system must provide any required safety functions. The motor has length code C and design version 1, and it belongs to the second KSM series. Its basic performance level supports decentralized motion tasks that do not require integrated safety functions or an internal holding brake.