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

Bosch Rexroth Indramat builds the KSM02.1B-041C-42N-M1-HG2-ET-NN-D7-NN-FW, a motor-integrated servo drive belonging to the KSM Motor Integrated Servo Drives series. By combining drive electronics, a synchronous motor, feedback devices, and fieldbus networking in one enclosure, the unit saves panel space and shortens installation time on automated pick-and-place axes, conveyor stations, and compact assembly cells. It fulfills the role of both drive and motor, delivering decentralized motion control directly on the machine without a separate cabinet-mounted inverter.

Electrical power is fed through a hybrid connector that carries DC bus power, logic power, and network lines in a single cable. The inverter operates from a nominal DC 750 V link and excites the three-phase winding code 42 installed in motor size 041 with length C. Heat generated by the switching devices is removed through natural convection, eliminating the need for cooling fans. The plain steel shaft transfers torque to the driven load and includes a seal that limits oil ingress, while an electrically released holding brake engages when the external 24 V supply is absent. Communication with higher-level controllers is handled through Multi-Ethernet interfaces, allowing the drive to join EtherNet/IP, PROFINET, or EtherCAT networks without changing the interface.

The integrated feedback system uses a Hiperface serial interface and an optical scanning method. This feedback arrangement supports closed-loop position and speed regulation within the integrated drive. It provides position data with 128 signal periods per mechanical revolution and stores turn counts in a multi-turn absolute counter, enabling accurate operation without homing after power cycles. The drive electronics use design version 1, and the unit belongs to Series 2.