Product Description:

The DKR04.1-W400E-BE43-02-FW is built by Bosch Rexroth Indramat for the DKR Drive Controllers series. Classified as a digital intelligent AC drive controller, the unit governs high-power servo axes in automated production cells where controlled torque, speed, and position are required for repeatable motion. It belongs to Line 04 and carries function module 43, providing a modular platform for demanding mechanical stages such as heavy transfer axes, synchronized rollers, and large positioning systems.

At a 4 kHz switching frequency, the controller sustains a continuous output of 210 A, letting large rotary motors run under rated load without temperature cutback. This current corresponds to a continuous power capacity of 93 kW, which suits heavy conveyors, presses, and extruders. For short bursts, the drive can source up to 282 A, so acceleration peaks do not immediately trip the protection logic. Total internal losses reach 2500 W, and that heat load must be considered when planning enclosure ventilation and thermal removal. An external bleeder with an integrated brake chopper connects to the rigid DC bus to absorb regenerated energy during rapid stops. Current class 400 sizing and digital servo or resolver feedback support precise dynamic response during changing load conditions.

Control circuits draw from an AC 230 V ±10% auxiliary line, while the power stage accepts 3x AC 400-480 V ±10% three-phase mains that match common plant supplies. Motion commands and diagnostic data move through the deterministic SERCOS interface, which helps reduce cycle jitter in multi-axis systems and supports synchronized communication with higher-level control. Cooling is handled by a built-in air blower that directs airflow across the heat sinks, so no external liquid loop is required. With a mass of 150 kg, the drive typically requires lifting equipment for positioning during installation. Design version 1 is used for this controller, and the product group classification identifies its intended drive family.