RAC 2.2-150-380-A0S-Z1 Bosch Rexroth Indramat
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MPN: R911238571
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The Bosch Rexroth Indramat RAC 2.2-150-380-A0S-Z1 is an AC main spindle drive controller from the RAC Spindle Drive Controllers series. It features a rated current of 150 Amps, a rated connection voltage of 3 x AC 400 Volts at 50-60Hz, and uses an internal blower for cooling. The controller includes a serial RS 232-C interface and an X4 terminal with 9 poles.
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Product Description:
The RAC 2.2-150-380-A0S-Z1 is an AC main spindle drive controller manufactured by Bosch Rexroth Indramat and assigned to the RAC Spindle Drive Controllers series. In machining centers and other automated tooling stations, the unit converts speed-reference commands into regulated three-phase power for synchronous or induction spindle motors. This allows closed-loop control of cutting speed and spindle positioning. The controller also manages spindle behavior during acceleration, steady cutting, and commanded stopping so machine motion remains stable under varying loads. By integrating power conversion, monitoring, and serial communication in one chassis, the controller simplifies cabinet layout and reduces the need for separate interface modules.
It operates from a three-phase supply of 3 x AC 400 V, 50 to 60 Hz, which matches common plant distribution voltages. When loaded to its continuous rating, the power section can deliver a spindle current of 150 A, so drives with high moment of inertia can be accelerated without exceeding thermal limits. Cooling is handled by a built-in blower, and the internal airflow helps maintain semiconductor temperature without external ducting. Command values arrive as an analog (+/- 10 V) speed reference, and a dedicated control board converts this signal into the corresponding current loop. This arrangement works well with controllers that output a standard analog speed command. Parameter data and diagnostics pass through the RS-232-C serial interface, which provides a direct point-to-point link with standard PC hardware.
The drive is supplied with an additional bleeder circuit that diverts regenerative energy to a braking resistor during rapid deceleration. The control board is specified without an additional encoder input, so the unit is intended for layouts that do not require a separate encoder expansion channel. Control wiring is grouped at connector X4, 9 poles, which keeps low-level connections organized inside the cabinet. The unit is in series 2 and Version 2.
Frequently Asked Questions about RAC 2.2-150-380-A0S-Z1:
Q: Does the RAC 2.2-150-380-A0S-Z1 spindle drive include an additional bleeder?
A: The RAC 2.2-150-380-A0S-Z1 is equipped with an additional bleeder to enhance safety and energy dissipation during braking.
Q: What is the rated current capacity for the RAC 2.2-150-380-A0S-Z1 drive?
A: This model supports a maximum rated current of 150 A for main spindle operation.
Q: What cooling mechanism is used in the RAC 2.2-150-380-A0S-Z1?
A: The cooling system uses an internal blower with a built-in fan to maintain optimal temperatures during operation.
Q: What are the rated connection voltage and frequency requirements for the RAC 2.2-150-380-A0S-Z1?
A: This drive controller accepts a 3-phase AC supply at 400 V and operates at 50-60Hz.
Q: What type of additional interface is available on the RAC 2.2-150-380-A0S-Z1?
A: A serial interface RS 232-C is provided on this model for device communication and configuration.
