RAC 3.5-150-460-APD-W1-220 Bosch Rexroth Indramat
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MPN: R911256094
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The Bosch Rexroth Indramat RAC 3.5-150-460-APD-W1-220 is an AC main spindle drive controller from the RAC Spindle Drive Controllers series. It has a rated current of 150 Amps and supports a rated connection voltage of 3 x AC 400 V or 3 x AC 460 V. The controller includes a high-resolution INDRAMAT encoder and is cooled by an internal blower or built-in fan.
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Product Description:
The RAC 3.5-150-460-APD-W1-220 spindle drive controller is produced by Bosch Rexroth Indramat and belongs to the RAC Spindle Drive Controllers series. Classified as an AC main spindle drive controller, it converts plant power into regulated three-phase output for machining center spindles while relaying encoder data to the CNC. Within an automation cell, the unit synchronizes spindle speed with programmed motion profiles, providing the closed-loop torque control required for milling, drilling, or turning tasks. It is suited to spindle applications that need stable speed control during changing load conditions and accurate response to commanded speed changes.
This Series 3, Version 5 device draws its mains power through a rated connection of 3 x AC 400 V, 50 Hz, +/-15% or 3 x AC 460 V, and the control section is energized separately at AC 230 V / 50-60 Hz. The power stage delivers up to 150 A of continuous phase current, giving high-inertia spindles rapid acceleration. Heat is extracted by a built-in blower, so cabinet airflow remains undisturbed. Velocity commands arrive as a differential analog (+/- 10 V) signal, which the controller translates into precise PWM drive patterns. The high-resolution Indramat encoder input helps maintain tight speed regulation during cutting load changes.
For indexed operations, the unit also accepts a digital position setpoint (16-bit parallel) interface that overrides the analog channel when exact angular positioning is required. A configuration jumper enables an additional encoder input for spindle feedback, supporting master-slave spindle arrangements and other coordinated spindle tasks. Because the DC bus is specified without an additional bleeder, external braking resistors must be fitted if long regenerative intervals are expected. Power, signal, and safety wiring land on the X4, 9-pole terminal block, which keeps connections consolidated at one interface. The controller retains the RAC mechanical and electrical format used in earlier installations.
Frequently Asked Questions about RAC 3.5-150-460-APD-W1-220:
Q: What is the rated current for the RAC 3.5-150-460-APD-W1-220 drive controller?
A: The RAC 3.5-150-460-APD-W1-220 spindle drive controller operates at a rated current of 150 A.
Q: What type of cooling does the RAC 3.5-150-460-APD-W1-220 utilize?
A: This model uses an internal blower or built-in fan for its cooling system.
Q: Does the RAC 3.5-150-460-APD-W1-220 support additional spindle feedback encoders?
A: The drive controller is equipped with an additional encoder input specifically for spindle feedback.
Q: What is the rated connection voltage for the RAC 3.5-150-460-APD-W1-220?
A: Rated connection voltage is specified at 3 x AC 400 V, 50 Hz, +/-15% or 3 x AC 460 V for main power.
Q: What type of speed command input does the RAC 3.5-150-460-APD-W1-220 accept?
A: The speed command input for this model accepts an analogue signal of +/-10 V.
