RAC 2.3-200-460-APD-W1 Bosch Rexroth Indramat
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MPN: R911256142
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The Bosch Rexroth Indramat RAC 2.3-200-460-APD-W1 is an AC main spindle drive controller in the RAC Spindle Drive Controllers series. It features a rated current of 200 amps and supports a rated connection voltage of 3 x AC 400 volts at 50 Hz or 3 x AC 460 volts. This unit is equipped with an internal blower and a high-resolution INDRAMAT encoder for spindle feedback.
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Product Description:
The RAC 2.3-200-460-APD-W1 is an AC main spindle drive controller produced by Bosch Rexroth Indramat for the RAC Spindle Drive Controllers series. The unit interfaces with machine control systems to energize and modulate large spindle motors, converting command signals into controlled three-phase output. It is used for closed-loop spindle speed regulation during drilling, milling, and grinding cycles. The controller helps maintain stable spindle performance when cutting loads change during operation. This makes it suitable for machine tools that need repeatable speed control during heavy material removal and rapid speed changes between machining steps.
Heat dissipation is handled by a built-in blower that forces cooling air across the power semiconductors, so no external ducting is required. The controller connects to 3 × AC 400 V, 50 Hz, ±15%, or 3 × AC 460 V mains, giving the unit compatibility with different plant power systems. At full duty, the power stage supplies up to 200 A of output current for high-inertia spindles that require strong starting torque. Speed is commanded through an analog (±10 V) interface, which supports direct connection to legacy CNC control cards. The model is supplied without an additional bleeder, so braking energy returns only to the DC link and must remain within the internal absorption capacity.
For position-synchronized operation, the drive also accepts a 16-bit parallel digital position setpoint, allowing fast reference updates during threading or contour cutting. It also provides an additional encoder input for spindle feedback, which can be used alongside the standard motor sensor. The primary feedback device is a high-resolution INDRAMAT encoder that supplies fine incremental signals to the vector control loop. All low-level signals terminate on X4 with 9 poles, which consolidates command and feedback wiring at a single interface. Using both command and feedback channels, the controller can keep the spindle aligned with axis motion where synchronized machining is required.
Frequently Asked Questions about RAC 2.3-200-460-APD-W1:
Q: What type of digital interface is available on the RAC 2.3-200-460-APD-W1 drive controller?
A: The RAC 2.3-200-460-APD-W1 supports a digital position set-point interface with 16-bit parallel input for precise spindle positioning.
Q: How is the RAC 2.3-200-460-APD-W1 cooled during operation?
A: This spindle drive controller is equipped with an internal blower and built-in fan for active cooling.
Q: Does the RAC 2.3-200-460-APD-W1 have an additional encoder input for spindle feedback?
A: The RAC 2.3-200-460-APD-W1 offers an additional encoder input specifically for spindle feedback purposes.
Q: What is the rated current output of the RAC 2.3-200-460-APD-W1 spindle drive controller?
A: The maximum rated output current of this model is 200 A, supporting high-power spindle applications.
Q: What rated connection voltages are supported by the RAC 2.3-200-460-APD-W1 drive controller?
A: This model accepts a rated connection voltage of 3 x AC 400 V, 50 Hz, +/-15% or 3 x AC 460 V, allowing flexibility for international installations.
