Product Description:

The DKR04.1-W400N-BT26-01-FW is a Digital Intelligent AC Drive Controller from Bosch Rexroth Indramat and belongs to the DKR Drive Controllers series. It is designed for multi-axis machining centers and heavy conveyor stages, where it receives industrial power and generates closed-loop, vector-controlled three-phase output for servo or spindle motors. Within an automation cell, it coordinates acceleration, speed, and positioning tasks through high-resolution current regulation, enabling consistent torque production even under fluctuating mechanical loads.

At a switching frequency of 4 kHz, it delivers a continuous output current of 210 A and can reach a peak of 282 A for short acceleration bursts. The corresponding continuous mechanical power is 93 kW, and the drive is built without a brake chopper or bleeder circuit. The mains supply is three-phase 3×AC 400–480 V ±10%, while the auxiliary electronics are energized by AC 230 V ±10%. A built-in blower provides air cooling and removes up to 2500 W of internally dissipated heat. The 400-ampere nameplate class indicates the required cable and fuse dimensions, and the housing directs airflow so the control electronics remain within their operating limits during extended duty.

Data exchange with the machine controller occurs over the SERCOS interface, allowing sub-millisecond parameter updates. Position and velocity loops can be closed using digital servo and resolver feedback, giving the axis flexibility to work with either high-resolution encoders or resolver transducers. The unit is version 1, part of line 04 with function module version 01, and it is housed in a steel enclosure that weighs 150 kg. Mounting frames must accommodate both its mass and the airflow path of the built-in fan while maintaining electrical clearance for the connector panels.