RAC 3.5-150-460-A0I-W1-220V Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RAC 3.5-150-460-A0I-W1-220V is an AC Main Spindle Drive Controller from the RAC Spindle Drive Controllers series. It features an internal blower for cooling, supports a rated current of 150 amps, and connects to three-phase AC at 400 or 460 volts. The controller includes an incremental encoder output and accepts an analog speed command signal.
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Product Description:
The RAC 3.5-150-460-A0I-W1-220V is an AC main spindle drive controller built by Bosch Rexroth Indramat for the RAC Spindle Drive Controllers series. The unit regulates torque and speed for high-power machine-tool spindles, translating motion commands from the automation system into controlled three-phase output for the motor. This supports stable spindle operation during speed changes, load shifts, and precision cutting tasks in industrial machining equipment.
Thermal management is handled by an internal blower that pulls air through the housing to keep power electronics within their temperature range. Control wiring terminates at the front-panel X4, 9-pole connector, which allows the control cable to be removed quickly when service access is needed. Position feedback can be routed outward through the built-in incremental encoder output, allowing a CNC or PLC to monitor actual spindle speed without extra interface modules. The controller accepts an analog (±10 V) speed reference, and this signal is converted internally into a torque-producing current profile. During full-load cutting cycles, the power stage can deliver up to 150 A of continuous three-phase current. Its mains input window accommodates 400 V class grids but is optimized for facilities that supply 3 x AC 460 V, allowing direct connection in North American plants without an isolation transformer.
The device is supplied without an additional bleeder, so surplus DC bus energy must be dissipated by the standard braking resistor in the cabinet or by regenerative operation on the power network. Internal logic and fan power are supplied from a separate feed of AC 230 V / 50-60 Hz, which helps isolate the control electronics from disturbances on the main power bus. Version numbering identifies this unit as version 5, matching it with parameter files used for series 3 hardware. An extra encoder input is not installed, which keeps the front panel limited to a single feedback channel.
Frequently Asked Questions about RAC 3.5-150-460-A0I-W1-220V:
Q: How is the RAC 3.5-150-460-A0I-W1-220V spindle drive cooled?
A: This model operates with an internal blower and built-in fan for cooling.
Q: What is the rated current of the RAC 3.5-150-460-A0I-W1-220V drive?
A: The RAC 3.5-150-460-A0I-W1-220V supports a rated current of 150 A.
Q: What type of speed command does the RAC 3.5-150-460-A0I-W1-220V support?
A: Speed is controlled via an analogue command signal of +/- 10 V.
Q: What is the rated connection for control electronics on this spindle drive?
A: The control electronics require an AC 230 V supply at 50-60 Hz.
Q: Which interface terminal does the RAC 3.5-150-460-A0I-W1-220V utilize?
A: The RAC 3.5-150-460-A0I-W1-220V uses a X4, 9-pole terminal as its interface terminal.
