RAC 2.2-250-460-A00-W1 Bosch Rexroth Indramat
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MPN: R911236374
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The Bosch Rexroth Indramat RAC 2.2-250-460-A00-W1 is an AC main spindle drive controller from the RAC Spindle Drive Controllers series. It features a rated current of 250 Amps and operates at 3 x AC 400 V or 460 V. The unit uses internal blower cooling and includes a 9-pole interface terminal with analog speed command input.
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Product Description:
The RAC 2.2-250-460-A00-W1 is an AC main spindle drive controller produced by Bosch Rexroth Indramat within the RAC Spindle Drive Controllers series. As a spindle-oriented unit, it receives speed commands from a numerical control and regulates the torque of induction or synchronous spindle motors used on machining centers and grinding machines. The controller is identified as series 2, version 2, and it is intended for cabinet installation with integrated cooling. This makes it suitable for machine tools that require stable spindle speed under changing load conditions.
This model delivers a continuous output of 250 A to the motor phases. Line power is accepted at 3 x AC 400 V with a base frequency of 50 Hz and a tolerance window of ±15%. It can also be connected to a supply of 3 x AC 460 V without changing parameters. Thermal energy produced by the switching devices is removed by an internal blower that draws air through the chassis, eliminating the need for external ducting. The controller accepts analog velocity references and sends gate-drive signals to the motor while monitoring current for overload protection.
Field wiring terminates at the control interface marked X4, with 9 poles, and the velocity command is supplied as an analog (± 10 V) signal from the CNC or PLC. Because the unit is supplied without an additional bleeder and without an auxiliary encoder input, deceleration depends on the drive's internal braking capacity and the main spindle encoder. This arrangement suits spindle systems that use the primary spindle encoder for feedback and standard analog command wiring. It is intended for installations where the speed reference comes directly from the CNC or PLC instead of from a separate local control source.
Frequently Asked Questions about RAC 2.2-250-460-A00-W1:
Q: What is the rated current capacity of the RAC 2.2-250-460-A00-W1 spindle drive?
A: This model provides a rated current output of 250 A.
Q: What supply voltage does the RAC 2.2-250-460-A00-W1 require for operation?
A: It supports a rated connection voltage of either 3 x AC 400 V at 50 Hz (+/-15%) or 3 x AC 460 V.
Q: What type of speed command input does the RAC 2.2-250-460-A00-W1 accept?
A: Speed commands for this spindle drive are handled using an analogue input of +/- 10 V.
Q: How is the RAC 2.2-250-460-A00-W1 spindle drive cooled?
A: Cooling is achieved using an internal blower or built-in fan system.
Q: Does the RAC 2.2-250-460-A00-W1 offer an additional encoder input?
A: This spindle drive controller does not include an additional encoder input.
