Product Description:

The DKR02.1-W200N-BE09-01-FW is a digital intelligent AC drive controller produced by Bosch Rexroth Indramat within the DKR Drive Controllers series. The unit converts line power into regulated three-phase output and supervises closed-loop motion for high-torque servo axes used in presses, gantries, and large machine tools. By combining current, velocity, and position regulation in one housing, it serves as the central power stage between the plant controller and the motor feedback system. This arrangement lets the drive respond quickly to load changes and maintain stable motion during demanding axis reversals.

The drive accepts a three-phase supply of 400–480 V AC ±10% and uses a rigid DC bus architecture, while a separate AC 230 V input keeps the control electronics active. Position and speed commands arrive through the SERCOS interface, allowing synchronized cyclic data exchange with the motion controller. At a switching frequency of 4 kHz, the power stage delivers a continuous armature current of 120 A, which corresponds to about 47 kW of mechanical power with a compatible motor. The separate control supply helps keep communication and regulation functions available during main power transitions. The design also supports digital servo and resolver feedback, so either sensor type can be evaluated without additional hardware.

Thermal management is handled by a built-in blower that forces air across the heat sink, and the controller dissipates up to 1600 W of loss power into the enclosure airflow. Because the bleeder option is omitted, that DC bus does not include a brake chopper, so regenerated energy must be diverted to an external resistor or a shared DC link. This is important in applications with frequent deceleration, where returned energy can rise quickly. The unit weighs 104 kg, which should be considered when planning panel support and handling. The controller is part of Line 02 and uses design version 1 with function module version 01.