Product Description:

The DKR02.1-W300B-BE30-01-FW is a digital intelligent AC drive controller built by Bosch Rexroth Indramat as part of the DKR Drive Controllers series. It is intended for heavy-duty motion tasks and provides closed-loop regulation for multiple servo axes in machining centers, printing lines, and material-handling cells. The device belongs to line series 02, uses design version 1, and has function module version 01. Its SERCOS interface provides deterministic command exchange with PLCs, while digital servo and resolver feedback channels close the position and velocity loops using signals returned from the connected motors.

The drive draws power from a three-phase mains range of 3xAC 400 – 480 V and uses an auxiliary control supply of 230 V ±10 %. Operating at a 4 kHz switching frequency, the power section can deliver a continuous armature current of 141 A and can reach 212 A during short acceleration periods. It provides a continuous mechanical output of 55 kW and belongs to the 300 current class. This combination allows the controller to support sustained motor load while still providing additional current during short dynamic events. Heat from the IGBT section is removed by a built-in air blower, and regenerated energy is handled by an internal bleeder. Total power loss is dissipated through vents at the top of the housing.

A brake resistor rated at 1.5 kW absorbs excess DC-bus energy and has an energy absorption limit of 240 kWs per braking cycle. This arrangement supports rapid deceleration without requiring a separate braking assembly, which keeps the braking function inside the controller housing. The unit has an installation weight of 104 kg, so the cabinet structure must support the load and leave room for airflow around the enclosure. The forced-air cooling path and the internal braking circuit work together during repeated stopping and acceleration cycles, helping the controller remain stable under demanding operating conditions.