Product Description:

Bosch Rexroth Indramat manufactures the DKR02.1-W300B-BE24-02-FW as part of the DKR Drive Controllers series. The unit is a digital intelligent AC drive controller intended to regulate large servo or spindle motors in automated machining cells and handling systems. It connects to higher-level motion controls through a SERCOS fiber-optic ring, letting axis commands and diagnostic data share the same deterministic channel. This arrangement allows motion control data and status information to move over one communication path with synchronized timing.

The drive supplies a continuous motor current of 141 A and can support short-term peaks up to 212 A for rapid acceleration profiles. Internally, the power electronics and bus capacitors allow a continuous electrical output of 55 kW, while control power is drawn from an auxiliary line rated at AC 230 V ±10%. The power stage connects to a supply of 3-phase AC 400–480 V ±10%, which matches common industrial plant power systems. A built-in blower moves ambient air across the heat sink so the IGBTs can operate at the specified switching rate without thermal derating. The controller is part of line 02 and design version 1, and it uses current rating code 300.

An internal bleeder circuit routes surplus DC-bus energy to a brake resistor that absorbs 1.5 kW continuously and stores emergency deceleration pulses up to 240 kWs. Under full regenerative load, the system releases 1800 W of heat, which the enclosure fan must expel into the cabinet airflow. Total installed mass is 104 kg, so cabinet rails and lifting equipment must support the unit during installation or removal. The controller accepts both digital servo feedback and resolver signals, which supports use with motors that have different feedback technologies. The SERCOS command layer also supports cycle-accurate coordination for multi-axis machining and transfer lines.