DKR04.1-W300E-BT49-01-FW Bosch Rexroth Indramat
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MPN: R911289532
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The Bosch Rexroth Indramat DKR04.1-W300E-BT49-01-FW is a digital intelligent AC drive controller from the DKR Drive Controllers series. It features an external bleeder with brake chopper and rigid DC bus, and supports a peak drive current of 212 Amps and a rated power voltage from 400 to 480 Volts AC. The unit has a continuous power of about 82 kW at 4 kHz and weighs approximately 150 kilograms.
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Product Description:
The DKR04.1-W300E-BT49-01-FW is a digital intelligent AC drive controller manufactured by Bosch Rexroth Indramat for the DKR Drive Controllers series. Used on machining centers, transfer lines, and press automation systems, it interprets motion commands and modulates three-phase power so large servo motors can follow programmed speed and position profiles. The unit combines power electronics, control logic, and regenerative handling in one frame, which helps reduce cabinet space and supports coordinated axis control in high-throughput equipment.
The drive exchanges deterministic motion data over the SERCOS interface. At a 4 kHz carrier frequency, it supplies a continuous phase current of 185 A, which corresponds to about 82 kW of shaft power for connected motors at rated speed. The control electronics operate from a single-phase AC 230 V supply with a tolerance of ±10%, and component temperature is managed by a built-in air blower. The integrated brake chopper directs regenerated energy to an external resistor bank through the DC link, while digital servo or resolver feedback channels read motor transducer signals. The 300 designation indicates the current class, and the controller is part of line 04 with design version 1 and function module version 01.
The power stage accepts 3 x AC 400–480 V mains and can deliver a peak output of 212 A during rapid indexing or emergency stopping. During sustained operation, the switching network can generate up to 2250 W of heat, so the enclosure ventilation must be sized for that thermal load. With a mass of 150 kg, the unit requires solid mounting support and suitable lifting provisions during installation. Energy returned during deceleration is buffered internally, and onboard diagnostics record overcurrent, temperature, and feedback deviations for fault tracking.
