RAC 2.3-200-460-A00-Z1 Bosch Rexroth Indramat
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MPN: R911256150
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The Bosch Rexroth Indramat RAC 2.3-200-460-A00-Z1 is an AC Main Spindle Drive Controller from the RAC Spindle Drive Controllers series. It supports a rated connection voltage of 3 x AC 400 V at 50 Hz, or 3 x AC 460 V, with a rated current of 200 Amps. This controller features internal blower cooling and an analogue speed command input of +/- 10 V.
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Product Description:
The RAC 2.3-200-460-A00-Z1 is an AC main spindle drive controller from Bosch Rexroth Indramat in the RAC Spindle Drive Controllers series. As a Version 3 unit within Series 2, it regulates the speed and torque of high-power machine-tool spindles by converting three-phase mains power into a tightly controlled output for induction or synchronous motors used in industrial automation. By accepting analog velocity references and providing rapid current-loop response, the controller permits precise surface finishing, drilling, and milling operations where stable spindle behavior is critical. This arrangement supports steady spindle performance during changing cutting loads.
This controller is fed from a supply of 3 × AC 400 V at 50 Hz with a tolerance of ±15 %, or alternatively from 3 × AC 460 V sources, allowing installation in European or North American mains environments without transformer adaptation. At a rated output of 200 A, the current-regulation stage can deliver the high magnetizing and acceleration currents required by large spindle motors while maintaining thermal limits through the unit’s monitoring circuits. The AC main spindle architecture relies on field-oriented control to translate the incoming power into a smooth, low-ripple armature current that tracks the analog speed command. That control method helps maintain consistent spindle speed during demanding machining cycles.
Speed demand enters through the differential input that interprets analog ±10 V signals, eliminating the need for fieldbus adapters in legacy retrofits. Control wiring and sensor feedback land on the X4 9-pole terminal, which helps simplify cabinet layout. Excess braking energy is dissipated by an additional bleeder, so external resistor banks are not required for deceleration cycles. Heat produced by the power semiconductors is removed by an internal blower, enabling continuous operation without external ducting. The unit omits an additional encoder input because its primary spindle feedback is managed internally.
Frequently Asked Questions about RAC 2.3-200-460-A00-Z1:
Q: What cooling method is used in the RAC 2.3-200-460-A00-Z1 spindle drive controller?
A: The RAC 2.3-200-460-A00-Z1 has an integrated internal blower and built-in fan for efficient cooling.
Q: What is the rated current for the RAC 2.3-200-460-A00-Z1 spindle drive controller?
A: This drive controller supports a rated current of 200 A for demanding spindle applications.
Q: What voltage input is required for the RAC 2.3-200-460-A00-Z1?
A: The RAC 2.3-200-460-A00-Z1 accepts a rated connection voltage of 3 x AC 400 V at 50 Hz (+/-15%) or 3 x AC 460 V.
Q: What type of speed command interface does the RAC 2.3-200-460-A00-Z1 use?
A: Speed commands are processed by an analogue input with a range of +/- 10 V.
Q: Does the RAC 2.3-200-460-A00-Z1 spindle drive controller include an additional bleeder?
A: This model is equipped with an additional bleeder for managing excess energy during operation.
