Product Description:

The DKR04.1-W400E-BE84-01-FW is a drive controller manufactured by Bosch Rexroth Indramat and supplied within the DKR Drive Controllers series. It is a digital intelligent AC drive controller used in automated machinery where high-power servo axes must be coordinated quickly and repeatably. The unit conditions three-phase mains power, generates a regulated DC bus, and feeds pulse-width-modulated voltage to connected motors so that position, speed, and torque can be controlled by a higher-level CNC or PLC.

At a nominal switching frequency of 4 kHz, the drive can provide a continuous output current of 210 A, which corresponds to a sustained mechanical power of about 93 kW when matched to suitable motors. The control electronics draw from an auxiliary supply of AC 230 V ±10%, allowing parameter access without energizing the power section. Command and diagnostic data are exchanged over the SERCOS interface, enabling deterministic, cycle-synchronous communication with motion controllers. The rectifier bridge accepts mains in the range of 3xAC 400–480 V ±10%, which covers common industrial distribution voltages. Type-code element 400 indicates the current rating class for this power stage within the DKR family.

A built-in air blower moves air through the heat sink, and this forced airflow works with an external bleeder and an integrated brake chopper connected to the rigid DC bus. During short acceleration bursts, the inverter can supply up to 282 A of peak current, giving extra torque for demanding loads. The unit dissipates about 2500 W of heat, while the assembly mass of 150 kg must be considered in cabinet layout. The controller supports digital servo feedback and resolver feedback, so it can be paired with a range of compatible motor types. The product is design version 1 with function module version 01 and line series 04.