Product Description:

The DKR03.1-W200B-BE74-02-FW is a drive controller manufactured by Bosch Rexroth Indramat and included in the DKR Drive Controllers series. It is a digital intelligent AC drive controller that manages power conversion, closed-loop control, and protective functions for high-power servo axes in automated manufacturing lines. By matching motor demand with available line energy, the unit supports precise positioning and rapid cycling in presses, gantries, and heavy material-handling stations.

The unit operates from a three-phase power bus rated at 400–480 V with a tolerance of ±10%, while the logic circuits use a separate 230 V control supply. At a switching frequency of 4 kHz, the drive can deliver a continuous armature current of 92 A and a peak current of 141 A during acceleration or short shock loads. Its continuous output power is 35 kW, making it suitable for large mechanical loads. The command interface uses the SERCOS fiber-optic standard, and the feedback channel accepts both digital servo feedback and resolver signals for closed velocity and position loops. The unit is part of line 03, uses design version 1, and has a 200 A current class. An internal blower forces air through the heat sink fins to control semiconductor temperature during full-duty operation.

Dynamic braking hardware is integrated into the controller. The internal bleeder directs excess DC-bus energy to a brake resistor that can absorb a continuous thermal load of 1 kW and handle up to 150 kWs during rapid deceleration cycles. Total controller losses reach 1200 W, so cabinet airflow must remove this heat to prevent derating. The unit weighs 49 kg, so the mounting structure must support a relatively heavy enclosure load. This mass also makes rigid fastening important when the controller is installed in a control cabinet.