KSM02.1B-071C-35N-M1-HG2-ET-NN-D7-NN-FW by Bosch Rexroth Indramat

The KSM02.1B-071C-35N-M1-HG2-ET-NN-D7-NN-FW is an integrated servo drive produced by Bosch Rexroth Indramat for the KSM Motor Integrated Servo Drives series. By combining power electronics, feedback, and a synchronous motor in one enclosure, the device simplifies installation in distributed automation lines. It performs precise torque and position control on packaging, material-handling, and assembly machinery without requiring a separate cabinet-mounted amplifier. The motor section has frame size 071 and length C, providing moderate inertia for mid-range axes. Design version 1 follows the standard mechanical option for this platform.

The drive operates from a DC 750 V bus, allowing direct connection to a shared high-voltage link. Thermal dissipation relies on natural convection, eliminating the need for cooling fans and their associated maintenance. Power, encoder, and brake conductors converge in a single hybrid connector, which reduces cable bulk and simplifies routing. Optical feedback uses the Hiperface interface to transmit absolute position data and electronic motor information. The encoder provides 128 signal periods per electrical revolution, supporting fine position interpolation by the drive. Its multi-turn absolute feedback preserves the recorded shaft position through power cycles without relying on batteries.

The motor uses an electrically released brake, so spring force locks the shaft when brake power is absent. The brake releases when supplied with DC 24 V from the machine's control supply, allowing the shaft to rotate during commanded operation. Command data and diagnostic information travel through the Multi-Ethernet interface, allowing connection to EtherNet/IP, PROFINET, or EtherCAT networks without a separate communication module. The motor has a plain shaft with an internal shaft seal, which supports direct coupling while helping protect the internal components from contaminants. Winding code 35 identifies the electrical configuration used with the matching drive controls. The unit does not include integrated safety technology, so required safety functions must be provided elsewhere in the machine control system.