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

The KSM02.1B-041C-42N-S1-HG0-ET-NN-D7-NN-FW is a motor-integrated servo drive produced by Bosch Rexroth Indramat as part of the KSM Motor Integrated Servo Drives series. By combining a synchronous motor, encoder, and power electronics in one housing, the unit simplifies wiring and reduces cabinet space in distributed automation systems. It supports applications that require compact positioning axes, and its Series 2 designation indicates the second product generation.

The drive accepts a supply of DC 750 V, so it connects directly to a shared high-voltage DC bus without an intermediate converter. Power, signal, and protective earth conductors are routed through a single hybrid connector, which simplifies installation on modular machines. Thermal losses are removed by natural convection, so no forced-air or liquid cooling circuit is necessary. Position feedback is returned over the Hiperface interface, providing digital identification data and analog sine-cosine tracks for precise interpolation. For real-time coordination with PLCs, the integrated controller supports Multi-Ethernet. The communication system can be configured for EtherNet/IP, PROFINET, EtherCAT, or SERCOS III, providing network flexibility without changes to the drive hardware.

The optical encoder resolves one mechanical revolution into 128 signal periods, and its single-turn design avoids the battery maintenance associated with multi-turn tracking. Stator length C pairs with motor frame size 041 to provide the torque capacity associated with winding code 42. A plain shaft transmits torque directly to couplings, while a shaft seal prevents lubricant from migrating along the journal. The drive uses the standard design option and design version 1. Its performance level is classified as Basic, and it does not include integrated safety technology. The unit is supplied without a holding brake, so an external mechanism must secure the load when power is removed if the application requires static holding force.