Product Description:

The DKR04.1-W300N-BE11-02-FW is produced by Bosch Rexroth Indramat for the DKR Drive Controllers series and functions as a digital intelligent AC drive controller. It supplies regulated three-phase power to large servo or spindle motors, enabling coordinated positioning, speed control, and torque control in automated machining cells. Through its integrated SERCOS communication hardware, the unit exchanges motion commands and status data with higher-level PLCs so that multiple axes can run synchronously within an industrial automation line. In heavy-duty axis systems, that communication link helps coordinate acceleration, deceleration, and load response across the machine without separate analog command wiring.

During continuous operation, the drive delivers 185 A of output current, while momentary load spikes are supported up to 212 A. Power is taken from a mains supply of 3xAC 400–480 V ± 10%, and the logic circuits are energized by a separate AC 230 V ± 10% control voltage. Internally generated thermal losses amount to 2250 W, so cabinet airflow must remove this heat to keep semiconductor junctions within their permitted operating temperature. The controller processes velocity and position feedback through digital servo and resolver channels, allowing closed-loop motor control across a wide operating range. It does not include a brake chopper, so regenerative energy must be dissipated by external hardware when braking duty is expected.

The converter can sustain 82 kW of mechanical output power. Cooling is provided by a built-in air blower, which forces air through the heat sink to carry thermal losses out of the cabinet. The housing weighs 150 kg, so the drive is intended for fixed industrial mounting rather than frequent relocation. A current rating code of 300 identifies the power section size used in this design. The product is in Line 04 and design version 1, and it does not include a bleeder, so regenerated energy must be handled elsewhere in the system.