Product Description:

The RAC 2.2-200-380-A0I-W1 is an AC main spindle drive controller from Bosch Rexroth Indramat and belongs to the RAC Spindle Drive Controllers series. It regulates the speed and torque of high-power spindle motors in machining centers and similar automation platforms. The controller converts three-phase mains energy into precisely metered output for dynamic spindle operation during acceleration, cutting, deceleration, and rapid load changes.

Thermal management is handled by a built-in cooling system that uses a built-in blower, so the unit can be mounted inside a sealed cabinet without external ducting. Power is supplied through a 3 x AC 400 V, 50–60 Hz connection, enabling direct linkage to common plant voltages used in industrial facilities. The controller can deliver a continuous line current of 200 A, matching large-frame spindle motors that draw high startup and cutting currents. Field wiring for control and monitoring signals terminates on connector X4 with 9 poles, which consolidates low-level I/O on a single plug and keeps panel wiring organized. Spindle speed is commanded through an analog (±10 V) reference, and this voltage span maps linearly to the programmed speed range for straightforward integration with PLC analog output cards.

For systems that already manage braking energy externally, the drive is supplied without an additional bleeder, which avoids redundant heat-dissipation hardware inside the cabinet. Encoder redundancy is not required, so the unit is supplied without an additional encoder input, and feedback comes from the primary spindle encoder channel routed through the drive. When downstream motion controllers need position or velocity data, an incremental encoder output provides differential TTL pulses that mirror spindle rotation. The hardware platform corresponds to Version 2, which matches the option set used across similar RAC units.