RAC 3.5-150-460-A0I-W1-220V

The Bosch Rexroth Indramat RAC 3.5-150-460-A0I-W1-220V spindle drive controller represents a high-performance solution in the RAC Spindle Drive Controllers series, engineered for precise main spindle management in CNC machine tools and industrial automation environments. This unit delivers robust control over three-phase spindle motors, supporting both 3 x AC 400 V, 50 Hz, +/–15% and 3 x AC 460 V supply networks. The controller integrates safety functions, including mains contactor and emergency-stop circuit compatibility, ensuring reliable operation under demanding conditions. With a continuous controller output of 35 kW, the RAC 3.5 provides ample power headroom for high-torque machining tasks while preserving speed accuracy. Its built-in fan cooling mechanism enables sustained performance without thermal derating, even during extended duty cycles.

Detailed technical specifications underscore the RAC 3.5’s engineering pedigree. The device type is specified as AC Main Spindle Drive Controller, and it operates with a Rated Current of 150 A and a continuous controller current of 92 A. Control electronics are powered via AC 230 V / 50–60 Hz, with a control power consumption of 200 VA. The protection category is IP10 (EN 60529), and the humidity class conforms to F (DIN 40040). Installation altitude is rated up to 1000 m, while ambient operating temperature ranges from +5 °C to +45 °C and storage temperature from –30 °C to +85 °C.

Operational features further enhance the unit’s performance and maintainability. The RAC 3.5 is fitted with an Internal Blower / Built-in fan cooling system, configurable to draw air from inside or outside the control cabinet or via an optional hose. Interface terminals include a dedicated X4, 9 poles connector for control signal routing, plus an additional incremental encoder output for spindle feedback. Although this version comes without additional encoder input and without additional bleeder, the integrated interface supports SERCOS and analog/digital set-point inputs. Version 5 firmware ensures compatibility with Indramat’s AS programming module, preserving all drive parameters for rapid commissioning and straightforward controller replacement.

System integration is streamlined through standard interface terminals and support for multiple speed set-point protocols, making the RAC 3.5-150-460-A0I-W1-220V ideal for retrofits and new installations alike. The controller’s configurable cooling options and IP10 rating allow deployment in a range of cabinet configurations and shop floor layouts. Target applications include high-precision CNC milling, turning centers, and other machine tool platforms where spindle speed accuracy, torque stability, and quick maintenance turnaround are critical. Coupled with Indramat’s programming module, this controller minimizes downtime while delivering the reliable performance demanded by modern industrial automation.