RAC 3.5-200-460-L00-W1-220 Bosch Rexroth Indramat
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MPN: R911256872
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The Bosch Rexroth Indramat RAC 3.5-200-460-L00-W1-220 is an AC Main Spindle Drive Controller from the RAC Spindle Drive Controllers series. It features a rated current of 200 Amps and operates with a rated connection voltage of either 3 x AC 400 V at 50 Hz or 3 x AC 460 V. This controller has internal cooling with a built-in fan and uses a SERCOS interface for speed command.
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Product Description:
The RAC 3.5-200-460-L00-W1-220 is an AC main spindle drive controller manufactured by Bosch Rexroth Indramat for the RAC Spindle Drive Controllers series. It governs high-speed spindle motors on lathes, milling centers, and grinding machines by applying closed-loop vector control to deliver commanded spindle motion and acceleration. By linking directly to a numerical control system, the device converts plant power into precisely timed current pulses, enabling consistent chip load, rapid positioning, and repeatable finishing operations across diverse workpieces.
It accepts a three-phase input of 3 x AC 400 V at 50 Hz, +/-15%, or 3 x AC 460 V, allowing operation on common European or North American supply systems. Continuous motor demand is supported by a rated output of 200 A, so large-frame synchronous or induction spindles can run at full torque without derating. The control electronics, cooling fan, and I/O draw from an isolated feed of AC 230 V at 50/60 Hz, which helps keep disturbances on the power stage away from signal circuits. Motion setpoints arrive through the deterministic SERCOS interface, where position words and diagnostic data are exchanged every cycle for coordinated multi-axis moves. Semiconductor heat is expelled by an internal blower with a built-in fan, allowing cabinet air to circulate through targeted channels and removing the need for external heat sinks.
Fiber-optic communication is routed through the X4 optical waveguide terminal, which helps eliminate ground loops and maintain signal integrity in electrically noisy machining cells. The unit is supplied without an additional bleeder, so regenerative energy must be dissipated by the machine's common DC bus or by an external resistor assembly. It also operates without an additional encoder input, because spindle feedback is expected through the standard resolver or motor encoder already present. The controller uses hardware release 3, and firmware version 5 preserves compatibility with existing Indramat parameter files and legacy pin assignments.
Frequently Asked Questions about RAC 3.5-200-460-L00-W1-220:
Q: What is the rated connection voltage for the RAC 3.5-200-460-L00-W1-220 spindle drive controller?
A: The RAC 3.5-200-460-L00-W1-220 operates with a rated connection voltage of 3 x AC 400 V at 50 Hz with a tolerance of +/-15% or 3 x AC 460 V.
Q: What is the rated current of the RAC 3.5-200-460-L00-W1-220?
A: This model supports a rated current of 200 A for high-performance spindle control operations.
Q: What speed command interface is used by the RAC 3.5-200-460-L00-W1-220?
A: Speed command management is achieved through the SERCOS interface on this drive controller.
Q: What type of interface terminal is featured on the RAC 3.5-200-460-L00-W1-220?
A: Interface terminal X4 with optical waveguides is used for communications on this model.
Q: How is the RAC 3.5-200-460-L00-W1-220 spindle drive controller cooled?
A: Cooling for this spindle drive controller is provided by an internal blower and built-in fan system.
