Product Description:

The DKR04.1-W400N-BA03-01-FW belongs to the DKR Drive Controllers series produced by Bosch Rexroth Indramat. It is a digital intelligent AC drive controller intended to regulate high-power servo axes in large industrial automation cells. The unit is supplied as Line Series 04 with Design Version 1, and it integrates Function Module 03 with Module Version 01. By combining an analog command interface with dual motor feedback support for digital servo and resolver signals, the controller provides closed-loop torque, speed, and position regulation without an internal brake chopper and instead relies on a rigid DC bus.

Under continuous operation with a 4 kHz switching frequency, the drive can sustain 210 A of phase current and deliver approximately 93 kW to the connected motor. The control electronics are powered from a separate supply of AC 230 V ±10%, allowing the logic circuits to remain active during main power interruptions. Thermal management is handled by an integral built-in air blower, which removes the heat produced by high carrier frequencies. A current rating of 400 indicates the maximum RMS current class for which the protective components and busbars are sized, making the controller suitable for high-torque spindle or gantry drives.

For short-term overloads, the unit can source a peak phase current of 282 A, enabling rapid acceleration profiles in servo applications. Mains power is accepted across three phases at 3x AC 400 ... 480 V ±10%, matching common plant distribution networks. During nominal operation, the electronics and switching elements dissipate up to 2500 W, so cabinet airflow must remove that heat through the fan-assisted cooling path. The mechanical structure weighs about 150 kg, so the mounting provisions should support that mass while maintaining vibration isolation and clear intake and exhaust channels.