KSM02.1B-071C-35N-M1-HG0-ET-S3-D7-NN-FW by Bosch Rexroth Indramat

The KSM02.1B-071C-35N-M1-HG0-ET-S3-D7-NN-FW is a motor-integrated servo drive manufactured by Bosch Rexroth Indramat for the KSM Motor Integrated Servo Drives series. It combines a permanent-magnet synchronous motor with drive electronics in one housing, allowing motion axes to be mounted directly on moving machine parts without a control-cabinet inverter. In packaging, material-handling, and small gantry systems, the unit supplies closed-loop torque, speed, and position control while reducing the amount of cabling required between the axis and control cabinet.

The drive draws power from a bus rated at DC 750 V; this high-voltage DC link permits low phase current and minimizes the required conductor cross-section. Heat is removed by natural convection, so the housing requires free airflow but no additional fans. A single hybrid connector carries the DC supply, safety I/O, feedback, and Ethernet lines, simplifying installation. Rotor position is measured through a Hiperface optical encoder that delivers 128 signal periods per mechanical revolution, supporting smooth sinusoidal commutation and precise velocity control. Safe Motion functions are available without an integrated safety brake. The motor has a plain shaft and no holding brake, making the axis suitable for horizontal loads that do not require mechanical locking when power is removed.

A multi-turn absolute encoder track retains position data after a power loss, allowing the axis to restart without a homing cycle. Drive control communicates with PLCs through a Multi-Ethernet interface, which supports SERCOS III, EtherNet/IP, EtherCAT, and PROFINET protocols through one connection. The motor uses frame size 071 with length code C to provide the continuous torque associated with the platform's basic performance level. The motor has winding code 35, while the unit has design version 1 and the standard mechanical option. A radial shaft seal protects the plain output shaft from dust and oil while helping maintain the enclosure's ingress protection.