RAC 2.3-150-460-A00-W1 Bosch Rexroth Indramat
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MPN: R911259374
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The Bosch Rexroth Indramat RAC 2.3-150-460-A00-W1 is an AC Main Spindle Drive Controller and part of the RAC Spindle Drive Controllers series. It features an internal blower for cooling and supports a rated connection voltage of 3 x AC 400 V, 50 Hz, +/-15% or 3 x AC 460 V. The drive controller handles a rated current of 150 Amps and uses an analog speed command interface of +/- 10 Volts.
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Product Description:
The RAC 2.3-150-460-A00-W1 is an AC main spindle drive controller manufactured by Bosch Rexroth Indramat and supplied within the RAC Spindle Drive Controllers series. It provides closed-loop regulation of high-speed machine spindles, accepting three-phase mains power and delivering controlled output current to match torque and velocity demands in CNC milling, turning, and grinding centers. By coordinating with motion supervisors over an analog reference, the controller maintains spindle stability during heavy material removal and rapid speed changes.
The power section is dimensioned for a continuous output of 150 A, allowing the unit to energize large-frame asynchronous or synchronous spindle motors without current derating. It can be wired to a supply of 3 x AC 400 V at 50 Hz with a ±15% tolerance, or alternately to 3 x AC 460 V networks, so the controller can be used with both European and North American plant voltages. Thermal energy generated by the power semiconductors is extracted by an internal blower; the built-in fan circulates cabinet air across the heat sink, eliminating the need for an external cooling module. Speed demand arrives as an analog (±10 V) signal, which means the controller interprets a symmetric voltage span as full reverse through full forward spindle speed.
Field wiring for control and diagnostics is concentrated on connector X4, 9 poles, so the remaining terminals are reserved for line power and motor leads. The unit is supplied without an additional bleeder, so regenerative energy is handled by the existing circuitry rather than a separate external resistor bank. It also operates without an additional encoder input, because speed feedback is expected from the primary spindle encoder already connected to the CNC. The designation Version 3 indicates the third revision of the controller logic within Series 2, with updated fault handling while maintaining parameter continuity with earlier RAC units.
Frequently Asked Questions about RAC 2.3-150-460-A00-W1:
Q: What type of cooling does the RAC 2.3-150-460-A00-W1 spindle drive controller use?
A: The RAC 2.3-150-460-A00-W1 uses an internal blower with a built-in fan for cooling.
Q: What are the supported rated connection voltages for the RAC 2.3-150-460-A00-W1?
A: This drive controller supports a rated connection voltage of either 3 x AC 400 V at 50 Hz (with +/-15% tolerance) or 3 x AC 460 V.
Q: What is the rated current of the RAC 2.3-150-460-A00-W1 spindle drive controller?
A: The rated current for this model is 150 A, suitable for demanding spindle applications.
Q: What type of speed command input does the RAC 2.3-150-460-A00-W1 support?
A: The RAC 2.3-150-460-A00-W1 spindle drive controller accepts analogue speed commands of +/-10 V.
Q: Does the RAC 2.3-150-460-A00-W1 come with an additional encoder input?
A: This model does not include an additional encoder input.
