RAC 3.5-150-460-L00-W1-220 Bosch Rexroth Indramat
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MPN: R911256108
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The Bosch Rexroth Indramat RAC 3.5-150-460-L00-W1-220 is an AC main spindle drive controller from the RAC Spindle Drive Controllers series. It features a rated current of 150 Amps and uses an internal blower for cooling. The controller operates with a rated connection voltage of 3 x AC 400 V at 50 Hz or 3 x AC 460 V and supports speed command via the SERCOS interface.
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Product Description:
The RAC 3.5-150-460-L00-W1-220 is an AC main spindle drive controller produced by Bosch Rexroth Indramat for the RAC Spindle Drive Controllers series. The unit governs spindle motors on metal-cutting or woodworking machines by modulating three-phase input power in response to commands from the numerical control. Its role is to deliver programmable torque and acceleration so cutting tools can maintain accurate feed rates without adding unnecessary mechanical stress. In automated machine tools, it supports stable spindle behavior during speed changes, load shifts, and programmed acceleration cycles.
Cooling is provided by a built-in blower, so enclosure air circulates through the heat sink without external ducting. The drive accepts 3 x AC 400 V, 50 Hz, ±15%, or 3 x AC 460 V, which allows connection to European or North American line supplies. Under continuous load, the inverter stage can supply 150 A for large spindle applications with high starting demand. Speed references arrive through the SERCOS interface, which supports deterministic fiber-optic communication with the control system. Diagnostic and parameter data pass through the dedicated X4 optical waveguide connection, helping control signals remain resistant to electromagnetic noise. For regenerative deceleration, the unit is supplied without an additional bleeder resistor, so rapid stopping applications may require an external braking resistor in the cabinet.
The control electronics remain energized by a separate AC 230 V / 50–60 Hz supply, allowing the logic section to stay active during brief line-power interruptions. This helps the controller retain operating status and command handling while the main power stage recovers from a short disturbance. Position feedback is handled through the primary bus, and the controller comes without an additional encoder input when only one feedback device is used. Within the RAC platform, the controller is in series 3 with hardware version 5, matching the blower arrangement and optical communication layout used by this model.
Frequently Asked Questions about RAC 3.5-150-460-L00-W1-220:
Q: What is the rated current capability of the RAC 3.5-150-460-L00-W1-220?
A: This drive controller supports a rated current of 150 A, enabling it to handle demanding spindle drive applications.
Q: How is the RAC 3.5-150-460-L00-W1-220 cooled?
A: The cooling system includes an internal blower and built-in fan for effective heat dissipation during operation.
Q: What is the rated connection voltage for this spindle drive controller?
A: The RAC 3.5-150-460-L00-W1-220 is operated with either 3 x AC 400 V, 50 Hz, ±15% or 3 x AC 460 V.
Q: Which interface is used for speed command in the RAC 3.5-150-460-L00-W1-220?
A: Speed control commands are transmitted via the SERCOS interface on this model.
Q: What interface terminal is available on the RAC 3.5-150-460-L00-W1-220?
A: Optical waveguides through the X4 terminal provide the main communication interface for this controller.
