Product Description:

The DKR02.1-W200N-BE43-01-FW is a digital intelligent AC drive controller manufactured by Bosch Rexroth Indramat for the DKR Drive Controllers series. It acts as the power stage between the plant supply and large Indramat servo or spindle motors, converting incoming energy into regulated pulse-width-modulated output. By coordinating torque, speed, and position loops, the unit supports high-precision processes in machining centers, material-handling gantries, and automated packaging lines. This arrangement lets one controller manage both dynamic motion demands and stable continuous operation in heavy-duty industrial systems.

The controller is part of line series 02 and is supplied as design version 1 with function module 43 at version 01. It connects to higher-level PLCs through a SERCOS interface. Its power section operates from a three-phase supply of 3xAC 400–480 V, while a separate logic circuit uses AC 230 V for the control electronics. At a switching frequency of 4 kHz, the inverter sustains 120 A of output current, which corresponds to approximately 47 kW of mechanical shaft power. The DC link is rigid and has no brake chopper, so regenerated energy must be handled by external equipment. Cooling is provided by a built-in blower, and the nominal current rating of 200 A leaves margin for overload events during demanding motion cycles.

During transient motion commands, the drive can deliver a peak current of 141 A before pulse-width limits intervene. Under continuous load, it releases up to 1600 W of heat, so cabinet airflow must remove that thermal load to protect the power semiconductors. Feedback channels accept digital servo and resolver feedback, allowing the controller to process different encoder types without external converters. The unit weighs 104 kg, so the cabinet structure must provide adequate support and secure mounting. Its combination of high current capability, flexible feedback handling, and forced-air cooling suits large-axis applications that require controlled acceleration, steady speed regulation, and accurate position response.