KSM01.2B-071C-35N-M1-HP0-SE-NN-D7-NN-FW by Bosch Rexroth Indramat

The KSM01.2B-071C-35N-M1-HP0-SE-NN-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 and inverter electronics in one housing to provide decentralized motion control. This arrangement reduces cabinet wiring and simplifies installation on conveyors, handling gantries, and compact assembly lines in industrial automation. Locating the drive electronics at the motor also shortens power and feedback connections between the components.

Electrical power is supplied through a DC 750 V link that is compatible with common IndraDrive bus couplers, while a single hybrid connector carries power and control lines. Heat is dissipated through natural convection, so no fans are needed for cooling. Rotor position is measured by an optical feedback system that provides 128 signal periods per revolution through a Hiperface interface. This resolution supports precise velocity control at low speeds. The assembly is Series 1 and design version 2. It has a 071 frame with a C length, providing moderate torque density under the standard design option and basic performance level. Its exposed cooling surfaces allow heat to pass directly from the housing into the surrounding air.

A multi-turn absolute encoder retains position data for up to 4,096 mechanical revolutions, eliminating the need for homing after a power loss. Motion commands are exchanged through SERCOS 2 (RS-422), supporting real-time synchronization with other axes on the communication ring. The motor has a shaft with a keyway for positive engagement with a compatible coupling or driven component. A shaft seal helps prevent process fluids and contaminants from reaching the internal bearings. Electromagnetic performance is established by winding code 35, which is selected for the intended torque and speed range. The unit is supplied without a holding brake, reducing rotor inertia for horizontally mounted axes. It does not include integrated safety technology, so emergency-stop functions must be handled by external safety equipment.