RAC 2.2-250-380-A00-Z1 Bosch Rexroth Indramat
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
MPN: R911234781
Ask for AvailabilityThe Bosch Rexroth Indramat RAC 2.2-250-380-A00-Z1 is an AC main spindle drive controller from the RAC Spindle Drive Controllers series. It has a rated connection voltage of 3 x AC 400 V at 50-60Hz and a rated current of 250 Amps. This controller features internal blower cooling, a 9-pole interface terminal (X4), and supports analog speed command input.
Internal Product Review
The RAC 2.2-250-380-A00-Z1 is an AC main spindle drive controller with internal blower cooling. Support for 3 x AC 400 V input and an analog ±10 V speed command makes the controller a strong fit for precise spindle applications.
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Product Description:
Bosch Rexroth Indramat manufactures the RAC 2.2-250-380-A00-Z1 as part of the RAC Spindle Drive Controllers series. This unit functions as an AC main spindle drive controller, supplying regulated power and speed commands to high-performance motorized spindles used in metal-cutting and other automated machining centers. By linking the spindle to the wider motion system, it converts low-level velocity references from a CNC or PLC into the high current required for rapid acceleration and accurate speed holding. This allows the spindle axis to respond quickly during speed changes while maintaining stable operation under varying cutting loads.
The controller operates from a three-phase supply of 3 x AC 400 V at line frequencies between 50 and 60 Hz and can deliver a continuous output of 250 A to the spindle motor. An internal thermal path based on an internal air blower moves air through the housing, allowing the electronics to dissipate switching and conduction losses without external cooling hardware. Speed references arrive as a differential analog signal of analog (+/- 10 V), providing the drive with proportional control over spindle speed. This differential input helps the controller respond to signed speed commands from the higher-level control. Field wiring lands on the X4 terminal block with 9 poles, which groups motor phases, protective earth, and sensor lines for straightforward cabinet integration.
Energy generated during rapid deceleration is handled by the built-in braking resistor, which is supplied with an additional bleeder to help prevent DC bus overvoltage and reduce cycle times. Position feedback options remain fixed because the unit is shipped without an additional encoder input, so applications that need only the standard spindle encoder can connect directly, while systems that require dual encoders need external signal conditioning. This arrangement suits spindle applications that use the standard feedback path and do not require a second encoder channel inside the drive. The drive is Series 2 and Version 2.
