Product Description:

The DKR02.1-W300N-BE76-01-FW is a digital intelligent AC drive controller produced by Bosch Rexroth Indramat within the DKR Drive Controllers series. The unit is part of Line 02, design version 1, and function module version 01. By regulating a rigid DC bus and supplying programmable current to matched synchronous or induction servo motors, it serves as the power stage for high-output automation axes in transfer lines, gantry systems, and heavy machining centers. In multi-axis equipment, it converts available bus energy into controlled motor current so torque, speed, and positioning commands can be followed under heavy load.

The drive accepts a rated supply of 3xAC 400-480 V ±10%, and its logic circuits use a separate AC 230 V ±10% control voltage so diagnostics and stored data can remain available during line-power interruptions. With a 4 kHz switching frequency, it can deliver a continuous phase current of 141 A and a short-duration peak of 212 A. The associated continuous shaft power is 55 kW, which supports demanding spindle or gantry duties. This current capacity is suited to large motors that need strong acceleration and stable torque delivery. Internal thermal management relies on a built-in air blower, which directs airflow across heat-producing components. The controller uses a rigid DC bus without a brake chopper, so regenerative energy is not dissipated inside the unit.

Total heat dissipation is 1800 W, so cabinet ventilation must remove a substantial thermal load during continuous operation. The controller weighs 104 kg, which requires a mounting structure suited to a heavy power unit. Communication uses the real-time SERCOS interface, while the feedback section processes both digital servo and resolver signals for closed-loop current and position control. Support for both feedback types broadens compatibility with existing motor installations. This arrangement allows the drive to work in machine platforms that require coordinated motion and precise motor feedback.