RAC 2.2-250-460-DP0-W1 Bosch Rexroth Indramat
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MPN: R911262899
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The Bosch Rexroth Indramat RAC 2.2-250-460-DP0-W1 is an AC Main Spindle Drive Controller from the RAC Spindle Drive Controllers series. It features a rated connection voltage of 3 x AC 400 V, 50 Hz, +/-15% or 3 x AC 460 V, and supports a rated current of 250 Amps. The controller offers high-resolution INDRAMAT encoder feedback with a digital 16 bit parallel speed command and includes cooling by internal blower.
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Product Description:
The RAC 2.2-250-460-DP0-W1 spindle drive controller is manufactured by Bosch Rexroth Indramat and belongs to the RAC Spindle Drive Controllers series. Engineered as the power interface for machine-tool main spindles, it converts digital setpoints from the CNC into variable-frequency, three-phase output for induction or synchronous motors. Its purpose in industrial automation is to keep spindle speed and torque consistent while cutting, drilling, or grinding, thereby supporting dimensional accuracy and surface quality. The controller is intended for machining centers and similar automated equipment where stable spindle behavior directly affects process results.
Its mains section accepts a rated connection of 3 x AC 400 V, 50 Hz, ±15%, or 3 x AC 460 V, giving flexibility in facilities that supply either voltage. Under continuous load, the power stage can deliver 250 A. Cooling of the power electronics is handled by a built-in fan, so external cabinet airflow is not required. Because the controller is supplied without an additional bleeder, regenerative energy is dissipated through inherent system losses, which limits long dynamic decelerations. Speed references arrive over a 16-bit parallel digital interface, allowing the CNC to send finely graduated command values for precise spindle control.
Feedback handling is supported by an additional encoder input for spindle feedback, allowing a secondary signal source to be connected during precision cycles. When used with a high-resolution INDRAMAT encoder, the drive can improve velocity regulation at elevated spindle speeds. All low-level signals, including brake release, fault reset, and analog monitoring, terminate on the X4 25-pole connector, which helps keep panel layouts orderly. As an AC main spindle drive controller, the unit combines command and feedback signals to maintain stable spindle speed as cutting loads change. This signal arrangement supports controlled spindle operation during demanding machining tasks.
Frequently Asked Questions about RAC 2.2-250-460-DP0-W1:
Q: What is the rated connection voltage for the RAC 2.2-250-460-DP0-W1 spindle drive controller?
A: The RAC 2.2-250-460-DP0-W1 supports 3 x AC 400 V at 50 Hz with ±15% tolerance or 3 x AC 460 V for its rated connection voltage.
Q: How is the RAC 2.2-250-460-DP0-W1 spindle drive controller cooled?
A: A built-in fan provides internal blower cooling for the RAC 2.2-250-460-DP0-W1 model.
Q: What is the rated current for the RAC 2.2-250-460-DP0-W1?
A: The rated current for this drive controller is 250 A, supporting high-power spindle operations.
Q: What type of additional encoder input does the RAC 2.2-250-460-DP0-W1 offer?
A: This controller features an additional encoder input specifically designed for spindle feedback applications.
Q: What is the format of the speed command input for the RAC 2.2-250-460-DP0-W1?
A: Speed commands are accepted digitally in 16-bit parallel format on this device.
