Product Description:

The RAC 2.2-200-460-A0I-W1/S001 is produced by Bosch Rexroth Indramat as part of the RAC Spindle Drive Controllers series. It functions as a main spindle drive controller that links the CNC control loop to the machine’s motor, converting command signals into regulated three-phase power. Within an automated machining cell, the unit maintains constant spindle velocity and delivers acceleration profiles required for tool changes and cutting passes. As an electronic module, it is installed in the power cabinet and communicates with motion controllers through analog velocity references or encoder feedback.

Its classification as an AC Main Spindle Drive Controller indicates that the inverter stage is optimized for high rotational speeds rather than axis positioning. Cooling is provided by an internal blower, so cabinet airflow does not need to be routed through the heatsink. The power section accepts a line supply of 3 x AC 400 V at 50 Hz, with a permissible variation of ±15%, enabling connection to standard European mains. The drive can operate at a continuous output current of 200 A, allowing it to energize large induction or synchronous spindle motors without derating. The unit is Series 2 and Version 2.

Additional interfaces complete the control chain. Speed demand enters through an analog ±10 V input that is filtered and scaled before reaching the pulse-width modulator. Tachometer information can be forwarded to external motion cards because the drive supplies an incremental encoder output, but it is shipped without an additional encoder input, so secondary feedback devices must be wired directly to the CNC. Command and diagnostic signals leave the controller on the X4 9-pole interface, and braking energy is handled solely by the internal circuitry because the unit is supplied without additional bleeder hardware. For facilities using North American mains, the rectifier bridges accept 3 x AC 460 V, matching common 480 V distribution without a step-down transformer.