Rexroth DKC Series Modules: DKC1.03-008-3-MGP-01VRS

Technical Dossier

Product Details And Specifications

Bosch Rexroth DKC Series: Comprehensive Module Range and Technical Overview

The Bosch Rexroth DKC (DIAX04 Drive Controller) series represents one of the most widely deployed AC servo drive platforms in global heavy industry. Installed across petrochemical refineries, nuclear power auxiliary systems, offshore drilling rigs, and continuous-process chemical plants, the DKC series established a benchmark for modular, fieldbus-integrated motion control from the mid-1990s through the 2010s. Its distributed architecture — separating the power section, control firmware, and communication interface into discrete, field-replaceable modules — made it the preferred platform for plant engineers requiring long-term maintainability in environments where unplanned downtime carries six-figure hourly costs. Installed base estimates place active DKC units in the tens of thousands across EMEA, Asia-Pacific, and North American industrial facilities.

The Evolution of DKC Series Architecture

The DKC series was introduced as part of Rexroth's DIAX04 drive system, succeeding the earlier DIAX03 (DKC03) platform. The architecture is built around a common power bus (DC link) with modular firmware plug-in cards (FWA-DIAX04-xxx) that define the drive's operational profile — whether positioning, speed, torque, or synchronization. Communication is handled via interchangeable interface modules supporting SERCOS I (fiber optic ring), PROFIBUS-DP, DeviceNet, Interbus, and CANopen, allowing the same power hardware to integrate into virtually any PLC or DCS environment without hardware replacement.

The DKC1.x sub-family targets single-axis applications in the 2.5 A to 100 A continuous current range. The DKC2.x sub-family introduced enhanced multi-axis synchronization. The DKC3.x line added expanded memory and higher-resolution encoder interfaces. Firmware versioning (e.g., MGP-01VRS, EFC-01VRS, FLP-01VRS) is critical: firmware is not universally interchangeable across hardware revisions, and mismatched firmware-hardware combinations will result in F8xxx fault codes at startup. As of 2026, the DKC series has entered end-of-life status with Bosch Rexroth, with IndraDrive (HCS, HMS, HMD) designated as the modern replacement platform. However, the installed base remains large enough that OEM-equivalent spare parts and refurbished units remain commercially essential.

DKC Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly stocked models within the Rexroth DKC / DIAX04 ecosystem, organized by functional category:

Servo Drive Controllers — DKC1.x (Single-Axis, Standard Current Range)

• DKC1.03-008-3-MGP-01VRS: Single-axis servo drive, 8 A continuous, 3-phase 400 V AC input, MGP positioning firmware, SERCOS interface ready.
• DKC1.03-012-3-MGP-01VRS: Single-axis servo drive, 12 A continuous, 400 V, MGP firmware, standard DIAX04 backplane compatible.
• DKC1.03-018-3-MGP-01VRS: Single-axis servo drive, 18 A continuous, 400 V, MGP firmware, suitable for mid-torque servo axes.
• DKC1.03-040-3-MGP-01VRS: Single-axis servo drive, 40 A continuous, 400 V, MGP firmware, high-current axis applications.
• DKC1.03-100-3-MGP-01VRS: Single-axis servo drive, 100 A continuous, 400 V, MGP firmware, heavy-duty spindle and feed axis use.
• DKC1.03-008-3-FLP-01VRS: Single-axis servo drive, 8 A, FLP (electronic gearing / cam) firmware variant for synchronization applications.
• DKC1.03-018-3-EFC-01VRS: Single-axis servo drive, 18 A, EFC (electronic cam) firmware, used in packaging and printing machinery.

Servo Drive Controllers — DKC2.x (Enhanced Synchronization)

• DKC2.1-040-7-FW: Dual-axis capable controller, 40 A, 700 V DC bus, firmware-configurable, used in coordinated multi-axis gantry systems.
• DKC2.3-040-7-FW: Updated DKC2 revision, 40 A, 700 V, enhanced encoder interface, compatible with Heidenhain EnDat 2.1.
• DKC2.3-100-7-FW: High-current DKC2 variant, 100 A, 700 V DC bus, heavy-duty coordinated axis control.

Servo Drive Controllers — DKC3.x (Extended Memory / High-Resolution Encoder)

• DKC3.1-040-7-FW: DKC3 platform, 40 A, 700 V, extended program memory, supports EnDat 2.2 and Hiperface encoders.
• DKC3.3-040-7-FW: Revised DKC3, 40 A, enhanced diagnostic memory, compatible with SERCOS II.
• DKC3.3-100-7-FW: High-current DKC3, 100 A, 700 V, full EnDat 2.2 support, used in precision grinding and milling centers.

Communication Interface Modules (Plug-in, DKC-compatible)

• CSB01.1N-SE-ENS-NNN-NN-S-NN-FW: SERCOS I fiber optic interface module for DKC1/DKC2/DKC3 drives, 2 Mbit/s and 4 Mbit/s selectable ring speed.
• CSB01.1N-PB-ENS-NNN-NN-S-NN-FW: PROFIBUS-DP interface module, supports DP-V0 and DP-V1, plug-in replacement for SERCOS module without drive hardware change.
• CSB01.1N-DN-ENS-NNN-NN-S-NN-FW: DeviceNet interface module for DKC series, Group 2 slave, 125/250/500 kbit/s.

Power Supply / Regenerative Units (DKC System-Compatible)

• HVR02.2-W018N: Rexroth regenerative power supply unit, 18 kW, compatible with DKC DC bus architecture, feeds shared DC link for multi-axis DKC installations.
• HVE02.2-W018N: Non-regenerative (resistor braking) supply unit, 18 kW, lower-cost alternative for applications without regenerative energy recovery requirements.

Sourcing Hard-to-Find & Obsolete DKC Series Parts

Bosch Rexroth formally discontinued new production of the DKC series. Standard distribution channels no longer carry stock, and lead times through authorized repair centers can exceed 16 weeks. DriveKNMS maintains a dedicated inventory of DKC series units — including low-current variants (8 A, 12 A) and high-current variants (40 A, 100 A) — sourced from decommissioned plant equipment, verified against original Rexroth factory test specifications, and held in climate-controlled storage to prevent capacitor degradation and PCB oxidation. For plants operating legacy DIAX04 systems with no near-term migration budget, DriveKNMS provides a lifecycle extension service: we cross-reference your installed firmware version, identify compatible hardware revisions, and supply matched drive-firmware combinations to eliminate startup fault codes. Emergency same-day dispatch is available for stocked units.

Quality Control for the DKC Series Range

DKC series drives present specific failure modes that require targeted test procedures beyond standard power-on verification. DriveKNMS applies the following protocol to all DKC units prior to dispatch:

• DC Bus Capacitor ESR Test: Electrolytic capacitors in the DC link section are measured for equivalent series resistance (ESR) and capacitance retention. Units with ESR deviation >20% from nominal are recapped before sale.
• SERCOS Ring Integrity Test: Fiber optic transmitter/receiver pairs are tested at both 2 Mbit/s and 4 Mbit/s ring speeds using a loopback fixture to confirm optical power margin.
• Firmware-Hardware Compatibility Verification: Each unit's installed firmware version (readable via the drive's H1 diagnostic display) is logged and cross-referenced against Rexroth's firmware compatibility matrix to confirm the hardware revision supports the installed FWA version.
• Encoder Interface Functional Test: Resolver, TTL incremental, and EnDat encoder interfaces are exercised using a signal simulator to confirm correct position feedback processing and absence of F2xxx encoder fault codes.
• Thermal Cycling Burn-In: Units are operated under load at elevated ambient temperature (50°C) for a minimum of 4 hours to screen for latent component failures before shipment.

For sourcing inquiries, cross-reference requests, or bulk spare parts orders for the Rexroth DKC series:

• Email: sale@driveknms.com
• WhatsApp: +86 18359293191
• Web: driveknms.com

© 2026 DriveKNMS. All trademarks belong to their respective owners. Specifications are for reference only and subject to change without notice. Verify all parameters against official documentation before installation.