Product Description:

The Bosch Rexroth Indramat RAC 2.3-200-380-LP0-W1 is an AC main spindle drive controller from the RAC Spindle Drive Controllers series. As a spindle drive controller, it regulates torque and speed for high-performance motorized spindles used in machine tools and other precision automation tasks. The unit integrates into multi-axis systems, providing closed-loop control of the attached spindle motor. In machine tool applications, this supports stable spindle regulation during cutting, drilling, and other speed-sensitive operations.

It operates from a three-phase supply of 3 x AC 400 V, 50-60 Hz, so it can be wired directly to standard plant power distribution without an intermediate transformer. The controller can deliver up to 200 A of continuous output current, enabling it to run large-frame spindle motors during heavy cutting or high-acceleration moves. Thermal management is handled by an internal blower, and the built-in fan draws cabinet air through the heat sink to maintain the power electronics within their allowable temperature range. Speed references are received digitally over the SERCOS interface, which permits synchronized motion with other axes on the bus. That communication method helps the spindle remain coordinated with feed axes during contouring and other linked motion. For real-time status and parameter access, optical signals are routed through the X4 optical waveguides terminal, minimizing electrical noise in harsh environments.

For position feedback, the controller provides an additional encoder input for spindle feedback, allowing simultaneous monitoring of motor-side and machine-side encoders when very precise positioning is required. The primary feedback channel accepts a high-resolution INDRAMAT encoder, giving fine speed resolution at low revolutions and supporting smooth surface finish during machining. Using separate feedback sources can help the control system compare spindle motion with machine-side position data when the application demands tighter accuracy. Because the unit is supplied without an additional bleeder, excess regenerative energy must be handled by the line or an external resistor when braking large inertial loads. This module belongs to hardware Series 2 and is identified as version 3.