Product Description:

The RAC 2.2-200-460-DP0-W1 is an AC main spindle drive controller manufactured by Bosch Rexroth Indramat for the RAC Spindle Drive Controllers series. It is designed to regulate high-power induction or synchronous spindle motors in machine-tool and production cells. The unit converts line power into controlled three-phase output while executing digital speed commands from the host CNC or motion platform. Its control role suits spindle applications that need stable speed regulation during cutting, drilling, milling, and other continuous-duty operations.

This controller connects directly to plant mains and supports 3 x AC 400 V, 50 Hz, +/-15% or 3 x AC 460 V input. It can deliver a continuous line current of 200 A to the motor power terminals. Commanded velocity data reach the control electronics through a 16-bit parallel digital bus, allowing fine set-point resolution without extra analog conversion delay. The parallel command path supports direct numeric speed transfer from the higher-level control and helps maintain consistent response during rapid set-point changes. Parameter access, enable signals, and diagnostic outputs are grouped on the X4 25-pole connector, which simplifies cabinet wiring to external PLC and interlock circuits. Thermal management relies on a built-in fan that pulls enclosure air across the heat sink so the unit stays within allowable silicon junction temperatures during continuous high-current duty.

No dynamic resistor bank is fitted, so the unit operates without an additional bleeder. Regenerative peaks are limited by the drive's internal circuitry and by motor design. Speed feedback precision is supported by the integrated high-resolution INDRAMAT encoder interface, and a dedicated channel provides an additional encoder input when spindle-mounted sensors must be read in parallel for orientation or positioning tasks. Using a second feedback channel can support spindle orientation, synchronized positioning, or monitoring of an auxiliary sensor mounted on the machine. The product is part of series 2, which places it in the second generation of RAC modules used in multi-spindle machining centers.