Product Description:

The DKR04.1-W400N-BE56-01-FW is a digital intelligent AC drive controller manufactured by Bosch Rexroth Indramat for the DKR Drive Controllers series. It conditions incoming power, executes motion commands, and manages motor position by using built-in digital servo and resolver feedback channels. In operation, it serves as the power and control stage between the supply and a compatible motor. This arrangement supports precise speed and position control in servo applications. Operating without a brake chopper on a rigid DC bus, the controller targets applications that can return regenerative energy to the supply rather than dissipate it through an internal bleeder.

Communication with the higher-level control system is handled over a SERCOS interface, while the main power section accepts a three-phase supply of 3 x AC 400 ... 480 V ±10%. At a 4 kHz PWM carrier, the inverter can deliver a continuous output current of 210 A, which corresponds to about 93 kW of mechanical power when paired with a suitable motor. Short-duration transients are supported up to 282 A peak, which helps the drive handle brief acceleration demands on heavy loads. The rigid DC link does not include an internal bleeder, so surplus regenerative energy must be absorbed by external components during rapid deceleration.

The control section is energized from a separate AC 230 V ±10% supply, which isolates logic power from the main bus. Thermal management relies on a built-in air blower, and under rated conditions the unit rejects about 2500 W of heat to the surrounding cabinet air. Because that heat is released into the cabinet, airflow planning remains important during installation. Mechanical installation must also account for the mass of 150 kg. The controller is part of line 04 with design version 1 and function module version 01.