Product Description:

The DKR04.1-W400N-BT29-02-FW is an industrial drive controller produced by Bosch Rexroth Indramat for the DKR Drive Controllers series. It is a digital intelligent AC drive controller installed between the mains supply and a servomotor to execute closed-loop motion commands in automated cells. Within multi-axis machinery, it converts commanded trajectory data into precisely modulated three-phase power so synchronous and asynchronous motors can follow programmed profiles with accurate speed and torque control. This arrangement makes the unit suitable for coordinated motion tasks that require stable axis response during changing load conditions.

It communicates with higher-level PLCs through the SERCOS interface, allowing deterministic cyclic data exchange between the controller and the machine control system. At a carrier frequency of 4 kHz, the drive can deliver a continuous armature current of 210 A, which corresponds to roughly 93 kW of mechanical output when paired with matching motors. The internal logic and gate drives are powered from a separate AC 230 V control supply, while the main power section accepts a three-phase input of 3x AC 400–480 V with a ±10% tolerance. These electrical ratings affect conductor sizing, protective devices, and transformer capacity required for installation.

For short acceleration bursts, the controller can source up to 282 A, and it uses a rigid DC bus without a brake chopper or external bleeder. Heat generated during peak operation is removed by an integrated air blower, and total loss power reaches 2500 W, so cabinet ventilation must prevent recirculation. The mechanical frame is design version 1 of line 04, carries a current rating code of 400, and weighs about 150 kg. Motor feedback channels support Digital servo and resolver feedback, allowing one axis to operate with precise position and speed feedback without additional sensor modules.