KSM02.1B-041C-42N-M1-HG2-ET-S3-D7-ES-FW by Bosch Rexroth Indramat

The KSM02.1B-041C-42N-M1-HG2-ET-S3-D7-ES-FW is a motor-integrated servo drive produced by Bosch Rexroth Indramat for the KSM Motor Integrated Servo Drives series. It combines a permanent-magnet motor, inverter stage, feedback electronics, and power interface in one housing so it can be mounted directly on moving axes. The unit provides closed-loop positioning and velocity control in packaging, assembly, and handling equipment while eliminating long motor-cable runs and separate drive enclosures.

Electrical power is supplied by a 750 V DC bus that feeds the internal inverter. Cabinet wiring is minimized because a single hybrid connector carries the supply lines, logic conductors, and network cabling. Heat is removed through natural convection, which keeps the housing compact and eliminates the need for fan maintenance. Command data are exchanged over Multi-Ethernet networks, allowing the axis to communicate with EtherNet/IP, PROFINET, or EtherCAT controllers. Rotor position is reported by a Hiperface encoder that produces 128 signal periods per mechanical revolution. Its absolute track stores position across a multi-turn absolute range, so the machine does not require a homing cycle after power is restored.

Motor size 041 and length C provide the torque envelope, while winding code 42 supports the basic performance level. A plain shaft mates with couplings, and a shaft seal helps prevent coolant from entering the motor. The unit is design version 1 within Series 2, and the ES design option supports external master communication. An electrically released holding brake operates at 24 V DC and secures vertical loads when power is removed. Encoder sensing uses optical technology for accurate position feedback during motion. The integrated safety functions follow the Safe Motion (without SBC) profile, allowing the axis to perform monitored-stop or limited-speed tasks without an external safety relay.