Product Description:

The RAC 2.2-200-380-API-W1/S001 is an AC main spindle drive controller produced by Bosch Rexroth Indramat for the RAC Spindle Drive Controllers series. Positioned between the plant power bus and a high-speed motor, the unit regulates torque, speed, and rotation direction so that machining centers and other automated tooling can maintain stable spindle motion. It is intended for machine tools that need closed-loop spindle control during acceleration, cutting, and rapid speed changes. That control helps the spindle respond predictably during drilling, milling, and similar processes where rotational consistency affects the finished surface.

This controller accepts a supply of 3 x AC 400 V at 50/60 Hz, so it can operate from common industrial mains. Its power stage supports a continuous current of 200 A, which suits large spindle motors during sustained load. Motion commands are received through an analog (+/- 10 V) reference input, allowing direct connection to compatible PLC and motion-control outputs. That signal interface supports straightforward speed control from external automation hardware without requiring a digital network command path. Heat is removed by a built-in fan, which helps keep the power section within its intended operating range. All low-level control wiring connects through X4 with 9 poles, which keeps signal termination organized inside the cabinet.

The drive is supplied without an additional bleeder, so regenerated energy must be handled elsewhere in the system. It also has an additional encoder input for spindle feedback, allowing an auxiliary sensor to be connected when the application requires more feedback data. For external devices, the controller provides an incremental encoder output that passes shaft position information onward. Internal evaluation uses the high-resolution INDRAMAT encoder protocol to support smooth speed control and low ripple at the spindle. The unit is identified as Series 2, Version 2.