KSM02.1B-041C-42N-S1-HG0-ET-NN-D7-ES-FW by Bosch Rexroth Indramat

The KSM02.1B-041C-42N-S1-HG0-ET-NN-D7-ES-FW is a motor-integrated servo drive built by Bosch Rexroth Indramat for decentralized motion control in the KSM Motor Integrated Servo Drives series 2. It combines a servomotor, power electronics, and a digital controller in one housing, removing the need for a separate cabinet-mounted drive. In packaging, assembly, and material-handling lines, the unit positions an axis directly on the machine frame. A shared DC bus connects it to the rest of the automation system and supports coordinated operation with other axes.

The drive uses a DC link rated at 750 V DC, allowing multiple axes to draw power from a common supply and share regenerated energy. A single hybrid connector carries power, control signals, and fieldbus communication, reducing the number of separate cable runs. Heat is removed through natural convection, so operation does not require cooling fans. Rotor position data are transmitted through a Hiperface interface connected to an optical encoder with 128 signal periods per revolution. The single-turn encoder provides an absolute position within one mechanical rotation. Because the actuator does not have a holding brake, stationary loads must be supported by drive-generated torque or an external mechanical device. The unit is design version 1 and has the Basic performance level.

Communication with the machine controller is handled by the Multi-Ethernet option, which supports several real-time Ethernet protocols through a configurable interface. Torque is transmitted through a plain shaft with an integral shaft seal, allowing the output flange to operate in lightly contaminated areas. Frame size 041 and motor length C establish the motor housing dimensions and available torque range. Winding code 42 identifies the winding configuration matched to the current capacity of the integrated inverter. The ES design option relies on communication with an external master for higher-level protective control.