RAC 3.5-150-460-A00-W1-220 Bosch Rexroth Indramat
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MPN: R911256105
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The Bosch Rexroth Indramat RAC 3.5-150-460-A00-W1-220 is an AC main spindle drive controller from the RAC Spindle Drive Controllers series. It is rated for a connection voltage of 3 x AC 400 V at 50 Hz or 3 x AC 460 V, with a current rating of 150 Amps. The controller features internal blower cooling, an X4 9-pole interface terminal, and uses analog speed command input.
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Product Description:
The RAC 3.5-150-460-A00-W1-220 is an AC main spindle drive controller built by Bosch Rexroth Indramat and supplied within the RAC Spindle Drive Controllers series. It is designed to regulate high-power machine-tool spindles by converting three-phase mains power into a controlled output that follows an analog speed reference from the machine control. By closing the electrical loop between the CNC and the motor, the unit delivers the torque and speed precision required for metal-cutting and similar continuous-duty processes.
An internal cooling path that relies on a built-in fan moves air across the heat sinks, allowing full output without external ducting. Control electronics are energized from a single-phase line rated at AC 230 V / 50–60 Hz, isolating signal circuits from the high-power stage. The inverter section accepts a three-phase supply of 3 × AC 400 V, 50 Hz ±15 % and converts it into phase-synchronized spindle currents. At the input terminals the drive can deliver up to 150 A of motor current, making it suitable for large frame induction or synchronous spindle motors. Command data reach the controller through terminal X4, a 9-pole interface that also forwards status signals to the CNC. Spindle speed is demanded by an analog reference of ±10 V, a format that simplifies integration with legacy or modern numerical controls.
This unit belongs to hardware series 3 and is built to operate without additional bleeder; therefore, any regenerative energy must be managed by the connected spindle or an external resistor. For installations supplied at 60 Hz in North America, the power section can instead be tied to 3 × AC 460 V, avoiding step-down transformers while keeping identical performance. Firmware and parameter memory correspond to Version 5, giving access to updated diagnostics and optimized current regulators that shorten settling times during rapid spindle accelerations.
Frequently Asked Questions about RAC 3.5-150-460-A00-W1-220:
Q: What is the rated connection voltage for the RAC 3.5-150-460-A00-W1-220 spindle drive controller?
A: The RAC 3.5-150-460-A00-W1-220 requires a rated supply voltage of 3 x AC 400 V, 50 Hz, +/-15% or 3 x AC 460 V.
Q: What is the rated current capability of the RAC 3.5-150-460-A00-W1-220?
A: This model supports a maximum rated current of 150 A for spindle operations.
Q: How is the RAC 3.5-150-460-A00-W1-220 cooled during operation?
A: Cooling is achieved with an internal blower and built-in fan for this unit.
Q: What speed command input type does the RAC 3.5-150-460-A00-W1-220 use?
A: The RAC 3.5-150-460-A00-W1-220 accepts analog speed commands in the range of +/- 10 V.
Q: Is an additional bleeder included with the RAC 3.5-150-460-A00-W1-220 drive controller?
A: No additional bleeder resistor is included with this spindle drive controller model.
