Product Description:

The DKR04.1-W300N-BE12-01-FW is a digital intelligent AC drive controller built by Bosch Rexroth Indramat and included in the DKR Drive Controllers series. It is designed to manage large servo and spindle motors in automated machining cells, transfer systems, and other high-power motion applications. The unit converts three-phase line power into regulated output while exchanging data with CNC or PLC motion controls. Current and velocity regulation are handled inside the controller so commanded motion can be followed with stable response. This allows precise torque, speed, and position control between high-level commands and the connected mechanical load.

In continuous duty, the drive supplies 185 A with a 4 kHz switching frequency, which corresponds to about 82 kW of mechanical power for connected axes. Cooling is handled by a built-in blower that forces air across the internal heat sinks, so no external liquid circuit is required. The forced-air layout also requires clear cabinet airflow around the cooling path to remove heat effectively during sustained operation. Logic functions are powered from AC 230 V ±10%, and real-time motion commands are transmitted through the SERCOS interface for deterministic fiber-optic communication. The power stage connects to three-phase mains from 400–480 V ±10%, and the rigid DC bus has no brake chopper.

Dynamic peaks reach 212 A, which provides additional headroom for acceleration bursts beyond the continuous operating range. Internal losses of 2250 W must be removed by the blower and cabinet airflow, and the assembled enclosure weighs 150 kg, which is relevant for mounting support inside the panel. Motion loops close through digital servo and resolver feedback, allowing the controller to process compatible position and speed signals from the motor. The unit is design version 1, function module version 01, and line series 04. These version codes identify this configuration within the drive line.