Product Description:

The RAC 2.3-200-380-A0D-W1 belongs to the RAC Spindle Drive Controllers series manufactured by Bosch Rexroth Indramat. It is used in machine tool and production cells to modulate spindle torque and speed according to CNC or PLC commands. The controller converts incoming three-phase mains power into regulated output for synchronous or induction spindle motors. It is commonly applied where a machine spindle must respond quickly to changing speed commands while maintaining stable torque under varying process loads.

This controller is an AC main spindle drive controller, so its power stage is intended for continuous high-current operation on spindle motors rather than feed axes. It can deliver a continuous output of 200 A, and its supply terminals accept 3 x AC 400 V, 50–60 Hz for direct connection to standard plant mains. Velocity can be commanded through an analog (±10 V) speed command channel, while position targets are transferred over a digital position setpoint (16-bit parallel) interface. All low-level wiring is grouped on the service connector X4, 9 poles, which keeps control I/O on a single plug instead of multiple terminal strips and reduces scattered low-voltage wiring in the cabinet. The design omits an additional bleeder resistor, so excess regenerative energy must be absorbed by the DC bus or an external braking module. There is also no supplementary encoder input, so feedback must come from the primary spindle sensor through the standard feedback port.

Thermal management is handled by an internal blower. The built-in fan moves air across the heat sink and eliminates the need for external ducting inside the enclosure. This arrangement supports steady cooling during sustained spindle loads and keeps the airflow path localized within the drive. The unit is Series 2 and Version 3.