RAC 3.5-100-460-A0I-Z1-220 Bosch Rexroth Indramat
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MPN: R911256089
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The Bosch Rexroth Indramat RAC 3.5-100-460-A0I-Z1-220 is an AC main spindle drive controller from the RAC Spindle Drive Controllers series. It operates with a rated connection voltage of 3 x AC 400 V, 50 Hz, plus or minus 15 percent or 3 x AC 460 V, and handles a rated current of 100 Amps. This controller features an internal blower for cooling, incremental encoder output, and a control electronics connection of AC 230 V at 50-60 Hz.
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Product Description:
The RAC 3.5-100-460-A0I-Z1-220 is an AC main spindle drive controller built by Bosch Rexroth Indramat for the RAC Spindle Drive Controllers series. It governs spindle torque and speed in machine tools, converting CNC commands into regulated three-phase output while reacting to load changes that can affect cutting stability during drilling, milling, and turning cycles. The unit is generation 3 and is intended for control cabinets with forced airflow, where it serves as the main power stage between the facility mains and the spindle motor control circuit.
The power section accepts a three-phase supply of 3 x AC 460 V, and it can also operate on 400 V networks within the stated tolerance range. With a continuous line draw of 100 A, the converter supports fast torque changes during spindle acceleration, speed correction, and recovery from changing cutting loads. The control electronics are powered separately by AC 230 V / 50/60 Hz, which lets the command section remain active when the main power circuit is isolated. The speed command enters through an analog (±10 V) input, and the controller converts that reference into the current demand used by the motor. Heat from the switching section is removed by an internal blower, so cooling air moves through the cabinet without external ducting.
During abrupt deceleration, regenerated energy is diverted to an additional bleeder resistor so excess DC-bus voltage can be dissipated safely. For downstream motion monitoring, the unit provides an incremental encoder output, but it does not include a secondary encoder input when only one feedback channel is needed. Low-level interfaces, including the speed command pair, terminate on the X4 9-pole connector, which keeps signal wiring grouped at one connection point. The unit is version 5, matching the release used for this controller configuration.
Frequently Asked Questions about RAC 3.5-100-460-A0I-Z1-220:
Q: What type of cooling system is used in the RAC 3.5-100-460-A0I-Z1-220 controller?
A: This spindle drive controller is equipped with an internal blower and built-in fan for cooling.
Q: What is the rated current supported by the RAC 3.5-100-460-A0I-Z1-220 spindle drive controller?
A: The RAC 3.5-100-460-A0I-Z1-220 supports a rated current of 100 A.
Q: What are the rated connection voltage options for the RAC 3.5-100-460-A0I-Z1-220?
A: This controller accepts a rated connection voltage of 3 x AC 400 V, 50 Hz, +/-15% or 3 x AC 460 V.
Q: Does the RAC 3.5-100-460-A0I-Z1-220 include an additional bleeder?
A: An additional bleeder is included in the RAC 3.5-100-460-A0I-Z1-220 for energy dissipation.
Q: What type of speed command input does the RAC 3.5-100-460-A0I-Z1-220 support?
A: Speed commands are accepted via an analogue input ranging from +/- 10 V.
