RAC 2.2-250-380-A0I-W1

The Bosch Rexroth Indramat RAC 2.2-250-380-A0I-W1 from the RAC Spindle Drive Controllers series is an AC Main Spindle Drive Controller with a rated connection voltage of 3 x AC 400 V, 50-60Hz and delivers a rated current of 250 A. It supports a speed command: analogue (+/- 10 V) for precise velocity control, enabling seamless spindle acceleration and deceleration profiles. The drive features an interface terminal X4, 9 poles for straightforward wiring and is shipped in version 2 of series 2 design, ensuring backward compatibility with modular Rexroth power racks. The compact chassis occupies minimal panel space while adhering to industrial EMC standards for reliable operation in harsh machining environments.

To maintain optimal thermal stability, the controller employs an internal blower / built-in fan cooling system that dissipates heat effectively even under continuous full-load conditions. The unit is supplied without additional bleeder and without additional encoder input, streamlining wiring complexity and reducing points of failure in standard configurations. A dedicated incremental encoder output ensures high-resolution feedback for closed-loop control, facilitating accurate spindle positioning and repeatable torque output. Robust power electronics combined with Rexroth’s modular control architecture allow rapid fault diagnosis and simplify integration into existing automation networks.

Engineered for CNC machining centres and high-speed drilling operations, the RAC 2.2-250-380-A0I-W1 offers precise spindle regulation and robust performance under varying load cycles. Its analogue speed reference and scalable feedback interface deliver dependable control across a wide speed range, while the absence of superfluous interfaces reduces susceptibility to electrical noise. This controller is ideal for industrial spindle systems requiring high-current capability, compact design, and straightforward configuration.