KSM02.1B-041C-42N-M1-HG0-ET-L3-D7-AN-FW by Bosch Rexroth Indramat

The KSM02.1B-041C-42N-M1-HG0-ET-L3-D7-AN-FW is manufactured by Bosch Rexroth Indramat as part of the KSM Motor Integrated Servo Drives series. It places drive electronics directly on a 041-frame motor so machine builders can shorten cabinet wiring and implement decentralized motion control across packaging, handling, and assembly lines. By converting direct-current bus energy into regulated shaft power, the unit delivers closed-loop torque and position regulation at the axis.

I/O and power enter through a hybrid connector that carries power, feedback, and fieldbus lines in one sealed interface. Thermal losses leave the housing through natural convection, eliminating the need for fans. The drive is supplied in an ATEX version for use in explosive gas zones. The link voltage is 750 V DC, matching compatible cabinet infeed modules. Axis coordination runs over Multi-Ethernet, providing support for PROFINET, EtherNet/IP, and EtherCAT. Frame code 041 and motor length C establish the magnetic stack, while winding code 42 determines the torque-speed curve. The electronics follow design version 1 within series 2. The drive has the Basic performance level assigned to this model. A plain shaft is fitted, and a shaft seal prevents coolant from entering the housing. The unit is supplied without a holding brake, so external clamping is required if load drift is unacceptable.

Position feedback relies on a Hiperface interface coupled to an optical encoder that delivers 128 signal periods per mechanical revolution. Because the sensor is a multi-turn absolute encoder, the controller retains position data across as many as 4,096 turns after a power cycle, eliminating the need for homing during startup. Drive-integrated safety is implemented through Safe Torque Off (STO), which internally cuts the gate signals so torque production stops within milliseconds when the safety circuit opens.