RAC2.3-200-460-DOI-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RAC2.3-200-460-DOI-W1 is an AC spindle drive controller from the RAC Spindle Drive Controllers series, weighing 121 kg and using a built-in fan for cooling. It features an integrated mains contactor and emergency stop switch, with a rated connection voltage of 3 x AC 400 V at 50 Hz or 3 x AC 460 V at 60 Hz. The controller offers a position resolution of 1/4,000,000 revolutions and a type current of 300 A.
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Product Description:
The RAC2.3-200-460-DOI-W1 is an AC main spindle drive controller produced by Bosch Rexroth Indramat and supplied within the RAC Spindle Drive Controllers series. It is intended to regulate the rotational speed and positioning of machine-tool spindles, linking the numerical control system to the motor and executing rapid torque commands for cutting, milling, and drilling tasks. By integrating the power stage, emergency-stop circuitry, and mains contactor in a single enclosure, the unit streamlines cabinet wiring in automated production cells. This arrangement allows the spindle axis to respond quickly to changing load conditions during acceleration and tool engagement.
This controller connects to plant power through a rated supply of 3 x AC 400 V/50 Hz or 3 x AC 460 V/60 Hz and can deliver a continuous line current of up to 300 A. Spindle velocity is commanded through a digital 16-bit parallel setpoint, while position feedback is interpolated to 1/4,000,000 rev, allowing fine contouring during high-speed machining. Thermal energy from the internal IGBT stack is removed by a built-in fan, eliminating the need for external liquid-cooling lines. An incremental encoder output is provided for synchronizing auxiliary axes, and an integrated emergency-stop channel disconnects the drive within milliseconds when the safety circuit is tripped. This model does not include additional bleeder or encoder input options.
The housing weighs 121 kg and has a protection rating of IP10, so it must be mounted inside a clean electrical cabinet. For reliable airflow, the fan requires at least 360 m³/h at a static pressure not above 390 Pa, and operation is permitted up to an ambient temperature of 55 °C when the controller is loaded to 80 percent of its nominal rating. Installations may reach altitudes of 1,000 m without derating, and a built-in fan-monitoring function halts drive pulses if minimum ventilation is not detected. Cabinet mounting also helps protect the controller from incidental contact while keeping the cooling path unobstructed.
Frequently Asked Questions about RAC2.3-200-460-DOI-W1:
Q: What is the position resolution of the RAC2.3-200-460-DOI-W1 drive controller?
A: The RAC2.3-200-460-DOI-W1 spindle drive controller provides a position resolution of 1/4,000,000 revolution.
Q: What rated connection voltage does the RAC2.3-200-460-DOI-W1 accept?
A: This controller supports a rated connection voltage of 3 x AC 400 V at 50 Hz or 3 x AC 460 V at 60 Hz.
Q: How is the RAC2.3-200-460-DOI-W1 spindle drive controller cooled?
A: The cooling system of the RAC2.3-200-460-DOI-W1 uses a built-in fan to maintain optimal operating temperature.
Q: What is the maximum ambient temperature for the RAC2.3-200-460-DOI-W1 when operating at 80%?
A: The RAC2.3-200-460-DOI-W1 operates reliably in environments up to a maximum ambient temperature of 55 °C at 80% load.
Q: Does the RAC2.3-200-460-DOI-W1 feature an emergency stop switch?
A: An integrated emergency stop switch is included with the RAC2.3-200-460-DOI-W1 for immediate power disconnection in case of emergencies.
