KUKA KRC4 00-168-334 / 00-181-563 & KRC2 00-126-383 / KRC2RDW 00-119-966 Circuit Board Cards

Technical Dossier

Product Details And Specifications

KUKA KRC Series: Comprehensive Circuit Board Range and Technical Overview

Q: How are RFQ terms confirmed?
A: Quantity, required condition, documentation needs, destination and sourcing route are confirmed during RFQ review before quotation.

The KRC2 platform, introduced in the late 1990s, established KUKA's modular controller architecture. The KRC4, launched in 2011, unified safety, motion control, and field bus communication onto a single hardware ecosystem. Both generations remain in active production use globally, and their circuit board components — including the specific SKUs covered on this page — are subject to ongoing demand from maintenance engineers and procurement teams managing long-lifecycle robot fleets.

The Evolution of KRC Series Architecture

The KRC1 (mid-1990s) used a proprietary VME-bus architecture with discrete analog servo amplifiers. Component sourcing for KRC1 is now almost entirely dependent on the secondary market, as OEM support has been fully discontinued.

The KRC2 generation (1999–2010) introduced a PC-based open architecture running Windows XP Embedded, with a standardized backplane connecting the KPS (power supply), KSP (servo pack), and DSE (drive system electronics) boards. Key compatibility constraints: KRC2 boards are not interchangeable with KRC2 ed05 variants without firmware alignment. The 00-126-383 circuit board is a core logic card within the KRC2 ecosystem, managing internal bus arbitration and I/O signal routing.

The KRC4 generation (2011–present) consolidated controller architecture onto a single cabinet with integrated safety PLC (KSB — KUKA Safety Board), EtherCAT-based internal communication, and Windows 7 Embedded. The 00-168-334 and 00-181-563 are KRC4 circuit board cards associated with power management and internal communication routing. Compatibility between KRC4 and KRC4 compact / KRC4 smallSize variants requires verification of hardware revision levels before substitution.

The KRC5 platform (2020–present) introduces further integration, but KRC4 remains the dominant installed base for the 2026 maintenance cycle, ensuring sustained demand for KRC4 spare boards through at least 2032 under standard 10-year support windows.

KRC Series Full Catalog & Functionalities (SKU List)

The following SKUs represent the most commonly sourced circuit board and electronic module parts across the KRC2 and KRC4 controller families. All models listed are verified components within the KUKA KRC ecosystem.

KRC4 Platform — Circuit Boards & Electronic Modules:

• 00-168-334: KRC4 internal circuit board card — power distribution and bus interface logic
• 00-181-563: KRC4 circuit board card — revised hardware revision for controller communication routing
• 00-168-335: KRC4 KPP (KUKA Power Pack) control board — DC bus management for servo drives
• 00-130-623: KRC4 KSB (KUKA Safety Board) — integrated safety PLC, SIL2/PLe certified
• 00-160-836: KRC4 CI3 (Controller Interface) board — EtherCAT master communication card
• 00-177-040: KRC4 compact MFC3 (Multi-Function Card) — I/O expansion and fieldbus gateway
• 00-168-337: KRC4 KSP 600-3x64 servo pack board — axis current control for axes 1–3
• 00-168-338: KRC4 KSP 600-3x40 servo pack board — axis current control for axes 4–6
• 00-109-477: KRC4 RDC (Resolver Digital Converter) board — encoder signal processing, all 6 axes

KRC2 Platform — Circuit Boards & Electronic Modules:

• 00-126-383: KRC2 main circuit board card — internal bus arbitration and I/O signal routing logic
• 00-119-966: KRC2 RDW (Resolver-Digital Converter) board — axis encoder signal conversion, 6-axis
• 00-107-077: KRC2 DSE-IBS (Drive System Electronics) board — servo amplifier interface card
• 00-116-344: KRC2 KPS 600/20 power supply board — 600V DC bus rectifier and regulation
• 00-120-351: KRC2 MFC (Multi-Function Card) — digital I/O, analog I/O, and safety relay interface
• 00-109-098: KRC2 ed05 CI (Controller Interface) board — upgraded fieldbus communication for ed05 variant
• 00-118-935: KRC2 SPS (Safety PLC Submodule) — hardware safety monitoring, E-Stop chain logic
• 00-126-384: KRC2 backplane bus terminator board — required for single-cabinet configurations
• 00-130-624: KRC2 teach pendant interface board — KCP connector signal conditioning card

Sourcing Hard-to-Find & Obsolete KRC Series Parts

DriveKNMS maintains a dedicated inventory of KRC2 and KRC4 circuit board cards sourced through verified industrial surplus channels, decommissioned robot fleet buybacks, and authorized secondary market partners. Our procurement network spans Europe, North America, and Asia-Pacific, enabling access to components that are no longer listed in active OEM catalogs.

Quality Control for the KRC Series Range

KUKA KRC circuit boards present specific testing challenges due to their integration of high-voltage DC bus interfaces, real-time EtherCAT communication stacks, and safety-rated I/O channels. Standard bench testing is insufficient for validating functional integrity.

DriveKNMS applies a structured test protocol for all KRC series boards prior to dispatch:

• Visual inspection: Component-level examination for capacitor bulge, PCB delamination, solder joint fatigue, and connector pin damage — common failure modes in boards exposed to industrial thermal cycling.
• Power-on functional test: Each board is energized within a compatible KRC test rig to verify boot sequence completion, LED status indicators, and absence of fault codes.
• Bus communication verification: For RDW and CI boards, resolver signal simulation and EtherCAT frame response testing confirm data integrity at rated cycle times.
• Safety channel validation: KSB and SPS boards undergo dual-channel safety input/output verification to confirm SIL2 functional compliance is not compromised.
• Burn-in cycle: Boards are operated under load for a minimum of 4 hours to screen for latent component failures before packaging.