RAC 2.1-150-380-AP0-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RAC 2.1-150-380-AP0-W1 is an AC main spindle drive controller from the RAC Spindle Drive Controllers series. It features a rated current of 150 Amps and operates with a connection voltage of 3 x AC 400 V at 50-60 Hz. This controller supports high-resolution INDRAMAT encoder feedback and is cooled by an internal blower.
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Product Description:
The Bosch Rexroth Indramat RAC 2.1-150-380-AP0-W1 belongs to the RAC Spindle Drive Controllers series and serves as an AC main spindle drive controller for CNC and general machining centers. By converting three-phase line power into controlled spindle output, the unit regulates the speed and torque of induction or synchronous spindle motors during cutting, drilling, and grinding cycles. In automated production lines, this role allows the spindle axis to respond smoothly to changing load conditions while maintaining the speed stability needed for consistent tool engagement and surface finish.
The controller uses a rated connection of 3 × AC 400 V, 50–60 Hz, allowing direct connection to standard factory mains. Its power stage can supply up to 150 A of continuous output to the spindle, which suits medium-to-high power machine tools. This current capacity supports sustained machining duty while keeping the spindle responsive during acceleration and changing process loads. Command input is voltage based, and the drive follows a differential speed signal of ±10 V analog, so common PLC or motion control outputs can provide the reference without protocol conversion. Internal thermal control is handled by an internal blower that circulates cabinet air through the heat sink, eliminating the need for external ducting. Field wiring for feedback, enable, and reference signals is grouped on the X4 9-pole terminal, which keeps these connections in one location.
Feedback capability is expanded by the additional encoder input, which accepts spindle position data alongside the primary resolver. The controller is factory matched to a high-resolution INDRAMAT encoder, enabling fine interpolation at low speed for tapping or thread-cutting routines. Energy diversion hardware is minimized because the design uses no additional bleeder; excess DC-bus energy is handled through the motor or braking components already present in the cabinet. The drive is Series 2 and Version 1. These identifiers distinguish the product generation used for this controller.
Frequently Asked Questions about RAC 2.1-150-380-AP0-W1:
Q: What is the rated current capacity of the RAC 2.1-150-380-AP0-W1 spindle drive controller?
A: The RAC 2.1-150-380-AP0-W1 supports a rated current of 150 A.
Q: What type of cooling method does the RAC 2.1-150-380-AP0-W1 use?
A: This model is equipped with an internal blower for cooling.
Q: What is the required supply voltage for the RAC 2.1-150-380-AP0-W1?
A: It operates on a rated connection voltage of 3 x AC 400 V at 50-60Hz.
Q: How does the RAC 2.1-150-380-AP0-W1 receive speed command signals?
A: The speed command is received via an analogue input of +/- 10 V.
Q: Does the RAC 2.1-150-380-AP0-W1 have an input for additional spindle feedback?
A: This drive controller includes an additional encoder input for spindle feedback.
