Product Description:

The RAC 2.2-200-460-LP0-W1 is an AC main spindle drive controller engineered by Bosch Rexroth Indramat and part of the RAC Spindle Drive Controllers series. The unit supplies closed-loop regulation for high-speed machine-tool spindles, converting fixed three-phase mains into a variable-frequency output that follows digital speed commands from a motion control system. By combining the power stage, control electronics, and forced-air cooling in one housing, it reduces cabinet complexity and supports compact spindle-drive layouts in machining centers, turning systems, and other automated metalworking equipment.

It draws a rated motor output current of 200 A, allowing the connected spindle motor to reach nominal torque across the usable speed range. The controller accepts 3 x AC 400 V, 50 Hz, ±15%, or 3 x AC 460 V, so it can operate on common industrial mains without a separate transformer. Heat produced by the switching elements is removed by an internal blower, which directs airflow through the housing and helps maintain stable thermal conditions during continuous spindle operation. Velocity references arrive through the SERCOS interface, and diagnostic data is carried on fiber lines connected to the X4 optical waveguides terminal for noise-resistant communication with the control system.

A high-resolution INDRAMAT encoder channel is provided for spindle position feedback, and an additional encoder input can be used when a separate measuring system is required for precise orientation or monitoring tasks. Because the hardware is delivered without an additional bleeder, regenerated energy must be absorbed by the common DC link or by external braking hardware. The controller uses Version 2, and its internal logic supervises fan operation, checks interface status, and reports deviation faults to the SERCOS master so the spindle axis can be monitored during normal operation.