Description

Rexroth DKC02.3-040-7-FW – ECODRIVE03 Servo Drive Controller

Product Overview

The Rexroth DKC02.3-040-7-FW is an Indramat ECODRIVE03 digital drive controller designed for single- and multi-axis industrial motion-control systems. It belongs to Series 02, Version 3 and provides a 40 A rated-current stage with a nominal 700 VDC intermediate circuit. The controller uses SERCOS for real-time communication with a higher-level motion controller and is intended for compatible AC servo applications. Published technical references specify a 200–480 VAC input range, depending on the supply configuration, and a compact 65 × 360 × 261 mm enclosure. The “FW” designation indicates that firmware is required and is separately associated with the controller configuration. For legacy equipment maintenance, the drive’s firmware, motor type, parameter set, and SERCOS configuration should be verified before replacement.

Technical Specifications — DKC02.3-040-7-FW

Published supplier references agree on the 40 A current rating, 700 VDC bus, SERCOS interface, dimensions, and approximate weight. The exact incoming-line configuration should be checked against the original drive documentation before energization.

Rexroth DKC02.3-040-7-FW

Key Features and Benefits — DKC02.3-040-7-FW

• 40 A rated-current output stage for demanding servo applications.
• 700 VDC nominal DC bus for high-performance motion-control operation.
• SERCOS communication for coordinated real-time axis control.
• Suitable for both individual and multi-axis ECODRIVE03 systems.
• IP20 cabinet-mounted construction.
• Built-in overload and short-circuit protection are documented for this controller family.
• Firmware and parameter configuration are closely tied to the application, which makes exact replacement important.

The ECODRIVE03 planning documentation also identifies specific restrictions for continuous and intermittent DC-bus power operation, so the application load profile should be reviewed rather than relying only on the 40 A nameplate value.

Related Models

Rexroth DKC02.3-100-7-FW — Higher-current controller in the same ECODRIVE03 DKC family for applications requiring substantially greater drive capacity.

Rexroth DKC02.3-040-7-FW — 40 A Series 02, Version 3 configuration with factory-assigned firmware architecture.

Rexroth DKC01.1 — Earlier DKC controller family used in legacy Indramat motion systems; compatibility must be evaluated at system level.

Rexroth ECODRIVE03 DKC Series — Broader controller family covering different current ratings and application configurations.

Installation and Maintenance — DKC02.3-040-7-FW

Before replacement, isolate the AC supply and allow the DC bus to discharge according to the applicable Rexroth safety procedure. Verify the motor type, encoder feedback, SERCOS fiber connections, firmware, and stored parameters before removing the original controller.

Inspect power terminals, cooling paths, connectors, and fiber-optic interfaces for contamination or mechanical damage. After installation, confirm parameterization and axis feedback before enabling motion. Personally, I would verify the firmware and complete motor-drive configuration first; a nominally identical controller can still fail to operate correctly when its application data is missing or mismatched.

Product Warranty — DKC02.3-040-7-FW

Warranty coverage depends on supplier, condition, testing status, and purchase agreement. For refurbished or surplus units, request a functional-test report and confirm the hardware identification before shipment. The Rexroth DKC02.3-040-7-FW should be matched to the installed ECODRIVE03 system, motor, feedback device, and SERCOS configuration before commissioning.