RAC 2.3-150-460-A0I-Z1 Bosch Rexroth Indramat
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MPN: R911268273
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The Bosch Rexroth Indramat RAC 2.3-150-460-A0I-Z1 is an AC main spindle drive controller from the RAC Spindle Drive Controllers series. It supports a rated connection voltage of 3 x AC 400 V at 50 Hz or 3 x AC 460 V, and provides a rated current of 150 Amps. The controller features internal blower cooling, an incremental encoder output, and an interface terminal of X4 with 9 poles.
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Product Description:
The RAC 2.3-150-460-A0I-Z1 is an AC main spindle drive controller manufactured by Bosch Rexroth Indramat for use in metal-cutting and woodworking machinery. As a member of the RAC Spindle Drive Controllers series, this version 3 unit coordinates spindle acceleration, deceleration, and constant-speed operation by combining power conversion, feedback handling, and analog velocity commands in one control package. Its control loop allows the connected spindle motor to follow process setpoints accurately, which helps production equipment maintain surface finish, feed synchronization, tool life, and repeatable cutting conditions during automated machining cycles.
Input compatibility covers two nominal supply groups: 3 x AC 400 V at 50 Hz with a ±15% tolerance and 3 x AC 460 V, allowing installation on European or North American plant grids without extra conversion hardware in many standard cabinet arrangements. When line power is present, the power stage can deliver a continuous 150 A output, making it suitable for high-torque spindle motors that must hold stable speed under changing cutting load. Speed references arrive through an analog (+/- 10 V) command, so a CNC that provides a standard differential velocity signal can govern the drive directly and adjust spindle speed smoothly during process changes. Thermal losses are removed by an internal blower mounted inside the housing, eliminating external ducting and helping keep enclosure layout simple and airflow paths contained within the unit.
The front-mounted X4 9-pole terminal carries enable lines and tachometer feedback, giving the control system direct access to essential spindle signals without adding separate interface hardware. The optional incremental encoder output passes rotor position to external monitors when speed observation, display functions, or related control tasks are required outside the main drive loop. Braking energy is dissipated by a built-in resistor bank supplied with an additional bleeder, which helps prevent intermediate-circuit overvoltage during rapid deceleration, tool changes, or repeated spindle slowdowns. For applications that already provide digital position feedback elsewhere, the drive is supplied without an additional encoder input, which avoids redundant feedback channels and keeps the signal arrangement aligned with systems that rely on other encoder sources.
Frequently Asked Questions about RAC 2.3-150-460-A0I-Z1:
Q: What is the rated current capacity of the RAC 2.3-150-460-A0I-Z1 spindle drive controller?
A: The RAC 2.3-150-460-A0I-Z1 supports a rated current of up to 150 A, allowing it to handle high load applications.
Q: What type of cooling does the RAC 2.3-150-460-A0I-Z1 use?
A: This spindle drive controller is designed with internal blower cooling and a built-in fan for thermal management.
Q: What input voltage does the RAC 2.3-150-460-A0I-Z1 require?
A: The RAC 2.3-150-460-A0I-Z1 operates with a rated connection voltage of 3 x AC 400 V, 50 Hz, +/-15% or 3 x AC 460 V.
Q: Does the RAC 2.3-150-460-A0I-Z1 provide any additional interface options?
A: This model offers an incremental encoder output as an additional interface for feedback or monitoring purposes.
Q: Is there an additional bleeder feature on the RAC 2.3-150-460-A0I-Z1?
A: An additional bleeder is included with this drive, enhancing its capacity for energy dissipation during operation.
