KSM02.1B-041C-42N-M1-HP0-ET-S3-D7-TO-FW by Bosch Rexroth Indramat

The KSM02.1B-041C-42N-M1-HP0-ET-S3-D7-TO-FW is a motor-integrated servo drive manufactured by Bosch Rexroth Indramat and supplied under the KSM Motor Integrated Servo Drives series. By combining drive electronics with a permanent-magnet motor in one housing, the unit simplifies cabinet wiring and supports decentralized motion axes in automated assembly lines and packaging machinery. It operates as a distributed node that receives networked drive commands and delivers closed-loop torque, speed, and position control to a connected mechanical load.

The drive draws power from a 750 V DC intermediate circuit and routes power and signals through a single hybrid connector, reducing the number of required cables. Internal losses are removed through natural convection, so no forced-air fans are needed. Position feedback is generated by a Hiperface optical encoder that provides 128 signal periods per mechanical revolution, enabling fine velocity regulation. The Multi-Ethernet interface communicates with the master controller and includes an output coupling option that supports a daisy-chain topology. The unit has design version 1, Series 2, motor size 041, length C, and winding code 42. These values match the motor configuration to its intended torque range.

A multi-turn absolute encoder stores motion data so the axis retains its position after a power cycle. Functional safety is provided through Safe Motion without SBC, which supports controlled stop and limited-speed functions when used with compatible Rexroth safety controllers. The mechanical interface uses a shaft with a keyway, and a shaft seal limits the entry of dust or fluid at the output flange. Because the unit is supplied without a holding brake, machines that require static load support must use external clamps or drive torque. The integrated drive has a Basic performance level for general-purpose servo applications.