KSM02.1B-041C-42N-M1-HG2-ET-S3-D7-TO-FW by Bosch Rexroth Indramat

The KSM02.1B-041C-42N-M1-HG2-ET-S3-D7-TO-FW is a motor-integrated servo drive produced by Bosch Rexroth Indramat for the KSM Motor Integrated Servo Drives series. It combines a permanent-magnet motor with frame size 041 and housing length C, placing the inverter stage directly on the machine axis to reduce cabinet space and simplify the electrical layout. The unit is design version 1, uses winding code 42, and has the Basic performance level for Series 2 units. An optical multi-turn absolute encoder tracks rotor movement for position control, while an electrically released holding brake secures the axis when the brake is not energized. A shaft seal protects the internal bearings against dust and splashing liquids during operation.

The drive accepts a bus voltage of DC 750 V, allowing it to connect to high-energy common-link systems without an intermediate transformer. Heat is removed exclusively through natural convection, so the mounting arrangement must provide enough clearance for rising air to pass along the cooling fins. Power, control, and brake lines are gathered in a single hybrid connector, reducing the number of separate cable connections required at the motor. Rotor feedback reaches the controller through a Hiperface interface. The optical encoder delivers 128 signal periods per mechanical revolution, supporting accurate position feedback and fine torque regulation during low-speed movements. The integrated layout reduces the amount of drive equipment that must be installed inside the control cabinet.

Real-time commands are exchanged over the Multi-Ethernet interface provided by the output coupling option, allowing the unit to operate with EtherNet/IP, PROFINET, or EtherCAT networks without additional communication hardware. The brake coil uses DC 24 V to release the holding mechanism under controlled logic, and the brake engages when its electrical supply is removed. Motion supervision is provided by Safe Motion without SBC, which supports drive-based safety functions but does not include safe brake control. Mechanical output is transferred through a plain shaft, which is suitable for direct connection to belt pulleys, gearheads, or clamping couplings. The integrated drive and motor arrangement also shortens the power path between the inverter and the windings, reducing the need for long motor cables within the machine.