RAC2.3-250-460-L00 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RAC2.3-250-460-L00 is an AC Main Spindle Drive Controller from the RAC Spindle Drive Controllers series. It has a continuous output of 65 kW and peak output of 78 kW, with a rated connection voltage of 3 x AC 460 V and a rated line frequency of 60 Hz. The controller weighs 121 kg and provides a position resolution of 1/4,000,000 rev.
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Product Description:
The RAC2.3-250-460-L00 is an AC main spindle drive controller manufactured by Bosch Rexroth Indramat and supplied within the RAC Spindle Drive Controllers series. It regulates power delivery to high-speed spindle motors used in metal-cutting and other precision machining centers, converting motion commands from a CNC or PLC into precise torque and speed control. By coordinating with the motor feedback channel, it maintains steady spindle performance during changing cutting loads and rapid speed corrections. In spindle applications, stable regulation helps maintain surface finish and tool performance when material hardness or cutting depth changes during a cycle.
At its rated supply of 3 x AC 460 V and 60 Hz, the controller provides a continuous output of 65 kW, which is suitable for medium-frame induction or synchronous spindle motors. Transient acceleration bursts are supported by a peak capability of 78 kW, while the power section is designed for 400 A to support high current demand at full load. During deceleration, the unit directs excess energy to an internal resistor bank to help prevent DC-bus overvoltage. A 24 VDC auxiliary output rated at 1 A can supply external cooling fans or holding-brake solenoids, and the feedback channel accepts resolver or encoder signals for closed-loop speed regulation.
Setpoints arrive through the SERCOS interface, allowing deterministic communication with the higher-level control system. The motor feedback connection uses a 15-pole interface, and the control electronics can generate position increments as fine as one four-millionth of a revolution for spindle functions that depend on accurate synchronization. The housing weighs 121 kg and carries an IP10 protection rating, so the unit is intended for installation inside a filtered cabinet rather than open exposure on the machine. Operation remains rated up to 1000 m elevation, and the single feedback path keeps the wiring layout straightforward.
Frequently Asked Questions about RAC2.3-250-460-L00:
Q: What is the continuous output power rating of the RAC2.3-250-460-L00 spindle drive controller?
A: The RAC2.3-250-460-L00 delivers a continuous controller output of 65 kW for demanding spindle drive applications.
Q: What is the required supply voltage for the RAC2.3-250-460-L00 drive controller?
A: This model supports a rated connection voltage of 3 x AC 460 V for operation in compatible industrial settings.
Q: What is the position resolution of the RAC2.3-250-460-L00 controller?
A: The RAC2.3-250-460-L00 features a position resolution of 1/4,000,000 revolution, enabling precise control of spindle position.
Q: Does the RAC2.3-250-460-L00 have an additional encoder input?
A: There is no additional encoder input provided on this model.
Q: What line frequency is the RAC2.3-250-460-L00 designed for?
A: The RAC2.3-250-460-L00 is designed to operate at a rated line frequency of 60 Hz.
