Product Description:

The RAC 2.3-150-460-A0I-W1 belongs to the RAC Spindle Drive Controllers series produced by Bosch Rexroth Indramat. It is intended to regulate the torque and speed of high-performance spindle motors in machining centers and other automated tooling stations. It translates motion commands from the CNC or PLC into precise three-phase output for the connected motor.

This unit is designed for supply networks that deliver 3 × AC 400 V, 50 Hz, ±15% or 3 × AC 460 V. The power section is rated for a continuous 150 A output, allowing the drive to support large synchronous or induction spindles during prolonged rough-cut cycles. Thermal control is handled by a built-in fan, so cabinet airflow must accommodate the exhaust path but no external heat sink is required. Command signals are introduced through an analog velocity interface. The ±10 V differential reference permits high-resolution speed control and rejection of common-mode noise, and this interface is identified here as the analog (±10 V) speed command. Field wiring terminates on connector X4, 9 poles, which groups ready, fault, and enable lines with the low-level command channels in one detachable plug.

The unit provides an incremental encoder output, so downstream position loops or supervisory equipment can monitor actual shaft speed without a separate feedback converter. The controller is classified as an AC Main Spindle Drive Controller, which confirms that it is intended for high-speed tool drives rather than general-purpose axis control. The unit uses version 3 software and components, and it is part of series 2. There is no additional bleeder resistor, and the housing has no auxiliary encoder input, so regenerative braking energy must be absorbed by the motor load or external dissipators and only the primary feedback channel is supported.