RAC 2.3-250-460-AP0-W1 Bosch Rexroth Indramat
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MPN: R911256152
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The Bosch Rexroth Indramat RAC 2.3-250-460-AP0-W1 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 and operates at a rated current of 250 Amps. The controller features internal blower cooling, a high-resolution INDRAMAT encoder, and has an analogue speed command input of +/- 10 V.
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Product Description:
The RAC 2.3-250-460-AP0-W1 is an AC main spindle drive controller manufactured by Bosch Rexroth Indramat for the RAC Spindle Drive Controllers series. In a machining center or grinding line, the unit converts three-phase mains power into a regulated spindle output. It serves as the power stage between the plant supply and the motorized spindle. That output controls torque and speed so the spindle can follow coordinated commands with axis drives and the CNC.
The controller draws a rated line current of 250 A, so upstream protection devices must support this continuous demand during full-load cuts. It supports 3 x AC 400 V, 50 Hz service for European plants and 3 x AC 460 V service for North American installations, which lets the same hardware operate on different regional grids. Thermal energy produced by switching losses is removed by an internal blower with a built-in fan, and spindle speed is commanded through an analog (+/- 10 V) reference that maps linearly to target rpm. This voltage input also simplifies connection to legacy CNC outputs. Position and velocity feedback rely on a high-resolution INDRAMAT encoder, allowing the drive to maintain field-oriented current control during low-speed threading.
Signal wiring lands on the X4, 9-pole interface, which groups enable, fault, and analog lines on a single plug for cleaner cabinet routing. Regenerative braking energy is dissipated by the built-in resistor network, and the unit comes without an additional bleeder, so external braking stacks are unnecessary unless extended-duty deceleration is expected. An additional encoder input for spindle feedback is provided for machines that use linear scales or secondary sensors, so the controller can compare two feedback sources during rigid tapping or C-axis interpolation. The unit is Series 2 and Version 3.
Frequently Asked Questions about RAC 2.3-250-460-AP0-W1:
Q: What is the rated current capability of the RAC 2.3-250-460-AP0-W1 spindle drive controller?
A: The RAC 2.3-250-460-AP0-W1 provides a rated current output of 250 A for demanding spindle drive applications.
Q: What supply voltage does the RAC 2.3-250-460-AP0-W1 require?
A: This model supports a rated connection voltage of either 3 x AC 400 V at 50 Hz ±15% or 3 x AC 460 V.
Q: How is the RAC 2.3-250-460-AP0-W1 spindle drive controller cooled?
A: The cooling system for the RAC 2.3-250-460-AP0-W1 uses an internal blower with a built-in fan.
Q: Does the RAC 2.3-250-460-AP0-W1 include extra encoder input options?
A: An additional encoder input for spindle feedback is available on this controller.
Q: What type of speed command input does the RAC 2.3-250-460-AP0-W1 accept?
A: The RAC 2.3-250-460-AP0-W1 receives speed commands via a ±10 V analogue signal.
