Product Description:

The DKR04.1-W400N-BE12-01-FW drive controller is built by Bosch Rexroth Indramat and belongs to the DKR Drive Controllers series. As a digital intelligent AC drive controller, it regulates large servomotors and spindle motors in automated machining cells, material-handling stations, and other high-power motion platforms. The unit interprets encoder or resolver feedback and delivers regulated three-phase output so that speed, torque, and position stay aligned with the programmed motion profile. Its control behavior is suited for demanding axes that require stable response during rapid starts, controlled deceleration, and continuous industrial duty.

At a switching frequency of 4 kHz, the controller can deliver a continuous output current of 210 A, which corresponds to an available continuous drive power of 93 kW. Transient demands are met through a peak current reserve of 282 A, allowing short acceleration bursts without loss of regulation. The power stage accepts a mains supply between 3×AC 400–480 V ±10%, while the internal logic and I/O are energized from a separate AC 230 V ±10% control circuit. These operating limits support stable motor excitation under changing load conditions and give the drive the electrical capacity needed for high-moment inertia axes.

Motion commands and diagnostic data reach the drive through a SERCOS interface, allowing integration with CNC or PLC hosts that operate high-bandwidth real-time networks. Thermal energy created by the switching devices is removed by air cooling with a built-in blower, because the unit releases up to 2500 W of heat during rated operation. The cooling arrangement helps keep internal temperatures controlled without requiring liquid cooling hardware. With a mass of 150 kg, the controller is typically cabinet mounted on reinforced backplates, and clear airflow around the intake channels supports consistent thermal performance during sustained operation.