KSM02.1B-041C-42N-M3-HP2-ET-L3-D7-NN-FW by Bosch Rexroth Indramat

Bosch Rexroth Indramat manufactures the KSM02.1B-041C-42N-M3-HP2-ET-L3-D7-NN-FW as part of its KSM Motor Integrated Servo Drives series. In this design, drive electronics mount directly on the motor housing so decentralized axes can be powered from a shared DC bus without long shielded motor cables. Classified under the Basic performance level and Series 2, the device is intended for medium-duty packaging, conveyor, and assembly stations that need coordinated speed and torque control with limited cabinet space.

The drive accepts a supply input of DC 750 V from the plant's intermediate circuit. A single hybrid connector carries power, safety, and communication lines in one molded plug, reducing the number of separate connections required at the motor. Heat is removed solely by natural convection, eliminating the need for fans and reducing maintenance requirements. Data exchange with controllers uses Multi-Ethernet, allowing the communication system to operate with SERCOS, EtherNet/IP, or PROFINET profiles. When a safety stop is commanded, the integrated function removes gate signals from the inverter and provides Safe Torque Off (STO).

The servo section has motor size 041 and length code C, and it uses winding 42 to support the required current and torque characteristics. Position feedback is delivered by a capacitive encoder that communicates through the Hiperface interface and provides 16 signal periods per mechanical revolution. Its multi-turn absolute counter retains position information after power is removed, allowing the controller to recover the recorded axis position when operation resumes. An electrically released brake engages automatically when its supply line is not energized, and the brake operates at DC 24 V. Mechanical power is transmitted through a shaft with a keyway, while a shaft seal helps prevent coolant and dust from entering the bearing chamber. The unit has the Standard design option, design version 1, and an aluminum housing that supports heat transfer from the integrated motor and drive electronics.