Product Description:

The RAC 2.3-200-380-A0I-Z1 spindle drive controller is manufactured by Bosch Rexroth Indramat and belongs to the RAC Spindle Drive Controllers series. As an AC main spindle drive controller, it converts three-phase mains power into regulated output for high-speed motor spindles used in machining centers and related automation cells. The unit forms the central power stage for closed-loop speed and torque control, interfacing directly with numerical control systems and spindle feedback devices. It is intended for spindle applications that require stable speed regulation during acceleration, cutting, and deceleration.

Its power section is rated for a continuous output of 200 A, enabling direct connection to large spindle motors without external boosters. The mains side accepts 3 x AC 400 V at 50 to 60 Hz, which matches standard factory distribution networks and feeds the DC link through an internal rectifier. Thermal management is handled by a built-in blower, so cabinet airflow can remain separate from the drive’s own cooling circuit. Speed reference enters through an analog (±10 V) channel, allowing straightforward coupling with conventional CNC cards. For position or speed feedback to downstream controls, the controller provides an incremental encoder output that replicates the spindle encoder signals. Field wiring lands on a 9-pole X4 connector, which groups control, monitoring, and signal grounds in one keyed plug.

Additional energy from rapid deceleration is dissipated by an additional bleeder resistor, which helps prevent DC-bus overvoltage during high-inertia stops. Because the unit has no additional encoder input, the design assumes a single primary encoder channel and keeps the feedback path straightforward for applications that use one spindle feedback device. The controller is Series 2 and version 3. This product generation is intended for use within the corresponding RAC platform.