RAC 2.2-250-380-A00-W1 Bosch Rexroth Indramat
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MPN: R911232713
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The Bosch Rexroth Indramat RAC 2.2-250-380-A00-W1 is part of the RAC Spindle Drive Controllers series and is an AC main spindle drive controller. It operates with a rated connection voltage of 3 x AC 400 V at 50-60Hz and has a rated current of 250 Amps. This model uses internal blower cooling and comes with an X4 9-pole interface terminal.
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Product Description:
The RAC 2.2-250-380-A00-W1 comes from Bosch Rexroth Indramat's RAC Spindle Drive Controllers series. It functions as an AC main spindle drive, supplying closed-loop speed regulation for machine-tool spindles and other high-inertia loads in automated production cells. By converting three-phase mains power into a controlled output for a synchronous or induction motor, the unit allows process controllers to command precise rotational profiles during cutting, drilling, or grinding operations. Closed-loop regulation also helps the spindle maintain stable speed when cutting loads change during a machining cycle.
The drive connects to plant power through a rated supply of 3 × AC 400 V, 50-60 Hz, matching common industrial distribution systems. Internal circuitry is sized for a continuous output of 250 A, giving the spindle ample startup torque and stable high-speed operation without current foldback. Thermal energy from the power electronics is removed by a built-in fan, so no external heat exchanger is required inside the cabinet. Field wiring terminates on the X4 9-pole interface, which groups control and sensor leads on one connector. Speed reference arrives as a ±10 V analog signal, a format widely supported by PLC motion cards and classic CNC controllers. This input range supports symmetrical forward and reverse speed commands for tapping cycles and spindle orientation routines.
The controller operates without an additional bleeder resistor, so regenerative braking energy must be absorbed by the DC-bus capacitors or returned to a line-side converter. Feedback is also handled without an additional encoder input; the primary spindle encoder connects directly to the associated servo drive, which reduces cable count and keeps cabinet wiring more direct. The unit is series 2, aligning it with second-generation RAC backplanes and gate drivers. Within that generation, it is version 2, indicating minor diagnostic updates while maintaining electrical compatibility with earlier 2.x models. This arrangement supports use in systems that already rely on the matching spindle feedback path.
Frequently Asked Questions about RAC 2.2-250-380-A00-W1:
Q: What is the rated supply voltage for the RAC 2.2-250-380-A00-W1 spindle drive controller?
A: The RAC 2.2-250-380-A00-W1 operates with a rated connection voltage of 3 x AC 400 V at 50-60 Hz.
Q: How is the RAC 2.2-250-380-A00-W1 spindle drive controller cooled?
A: This model features an internal blower or built-in fan for cooling.
Q: What is the rated output current of the RAC 2.2-250-380-A00-W1 controller?
A: The RAC 2.2-250-380-A00-W1 is designed to handle a rated current of 250 A.
Q: What type of speed command input does the RAC 2.2-250-380-A00-W1 support?
A: Speed commands for this controller are received via an analogue input of +/- 10 V.
Q: Does the RAC 2.2-250-380-A00-W1 come with an additional bleeder included?
A: This unit is produced without an additional bleeder, so any extra braking energy must be managed externally if required.
