KUKA KRC4 Modules: KRC4 00-183-926A1-X3 Control Cabinet Power Module 27V 40A —

Technical Dossier

Product Details And Specifications

KUKA KRC4 Series: Comprehensive Module Range and Technical Overview

The KUKA KRC4 is the fourth-generation robot controller platform introduced by KUKA Roboter GmbH (Augsburg, Germany) and has become the dominant control cabinet architecture across global heavy industry. Deployed in automotive body-in-white lines, chemical plant material handling, nuclear facility maintenance robots, and refinery pipeline welding cells, the KRC4 platform is estimated to account for the majority of KUKA’s installed base from 2011 onward. Its modular backplane architecture, standardized 27 VDC bus voltage, and Windows-based KUKA System Software (KSS) environment make it the reference platform for integrators requiring deterministic real-time motion control combined with open PC connectivity. The KRC4 00-183-926A1-X3 is a core power supply module within this cabinet, rated at 27 V / 40 A, responsible for delivering regulated DC bus power to the controller’s internal logic and I/O subsystems.

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The Evolution of KRC4 Architecture

KUKA’s controller lineage progressed through KRC1 (mid-1990s, proprietary VME bus), KRC2 (2000–2010, Windows XP-based, VxWorks real-time kernel, 24 VDC logic bus), and KRC2 ed05 (extended lifecycle variant) before the KRC4 platform launched in 2011. KRC4 introduced a unified 27 VDC internal bus, replacing the mixed-voltage schemes of KRC2, and adopted a dual-processor architecture separating the safety controller (KSB — KUKA Safety Board) from the motion controller (KPC — KUKA PC). The KRC4 compact variant (2013) reduced cabinet footprint for small-payload robots (KR AGILUS series), while the KRC4 smallsize (2015) targeted collaborative and cleanroom applications. The KRC4 mid-size addressed medium-payload cells. All variants share the same KSS 8.x software stack and the same 27 VDC power module form factor, ensuring cross-variant spare parts compatibility for power supply modules including the 00-183-926A1-X3. As of 2024, the KRC4 platform is in mature/sustained phase; KUKA has introduced the KRC5 for new installations, but KRC4 will remain in active industrial service through the 2030s given the volume of installed systems. Long-term maintenance sourcing is therefore a primary operational concern for end users.

KRC4 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified components within the KUKA KRC4 ecosystem, organized by functional category. Each module is a discrete field-replaceable unit (FRU) within the KRC4 cabinet.

Power Supply & Distribution

• 00-183-926A1-X3: 27 VDC / 40 A internal bus power supply module for KRC4 control cabinet logic rail
• 00-168-334: KRC4 primary AC/DC power supply unit, 3-phase input, 27 VDC output, standard cabinet
• 00-183-925: KRC4 compact power supply module, 27 VDC / 20 A, for KRC4 compact variant
• 00-130-629: KRC4 UPS buffer module, 27 VDC, provides controlled shutdown power during mains loss

Safety & System Boards

• 00-168-335: KSB (KUKA Safety Board) — dual-channel safety controller, SIL 2 / PLd certified, monitors E-stop, safeguard, and speed monitoring
• 00-168-336: KEB (KUKA Energy Board) — regenerative energy management board for KRC4 drive section
• 00-183-928: KPC (KUKA PC Board) — Intel Core i5-based motion controller board running KSS 8.x under Windows 10 IoT
• 00-168-337: KCB (KUKA Cabinet Board) — cabinet I/O interface board, manages fan control, temperature monitoring, door interlock

Drive & Servo Modules

• 00-168-338: KSD (KUKA Servo Drive) 48 A — axis servo drive module for KR 60–210 payload range
• 00-168-339: KSD 64 A — high-current servo drive for KR 240–500 heavy-payload robots
• 00-183-930: KPP (KUKA Power Pack) — DC link power supply for servo drives, 560 VDC bus
• 00-183-931: KPP 600/20 — 600 VDC / 20 A power pack variant for compact drive section

I/O & Communication Modules

• 00-168-340: KUKA DeviceNet adapter module for KRC4 — connects cabinet to DeviceNet fieldbus network
• 00-168-341: KUKA PROFIBUS DP master/slave module for KRC4 — 12 Mbit/s, DIN rail mount
• 00-183-932: KUKA EtherNet/IP adapter for KRC4 — 100 Mbit/s, supports implicit and explicit messaging
• 00-183-933: KUKA PROFINET IO device module for KRC4 — IRT capable, cycle time ≤ 1 ms
• 00-168-342: KRC4 digital I/O expansion board — 16 DI / 16 DO, 24 VDC, screw terminal, mounts in cabinet base

Sourcing Hard-to-Find & Obsolete KRC4 Parts

DriveKNMS maintains a dedicated inventory program for KUKA KRC4 spare parts, with particular focus on modules that have been discontinued from KUKA’s standard spare parts catalog or have extended lead times through OEM channels. The KRC4 platform’s mature lifecycle means that many first-generation modules (2011–2016 production runs) are no longer manufactured but remain in service in facilities with 10–15 year maintenance horizons. DriveKNMS sources these modules through certified secondary market channels, performs incoming inspection against original KUKA engineering specifications, and provides traceability documentation. For the 00-183-926A1-X3 power module specifically, DriveKNMS holds stock of both new-old-stock (NOS) and professionally refurbished units, with full load testing at rated 27 V / 40 A prior to shipment. Customers operating KRC4 fleets in chemical, nuclear, or refinery environments — where unplanned downtime carries significant safety and financial consequences — are encouraged to establish consignment stock agreements with DriveKNMS to ensure same-day dispatch capability.

Quality Control for the KRC4 Range

KRC4 modules present specific test challenges due to the platform’s integrated backplane communication architecture. The 27 VDC bus operates across multiple boards simultaneously, and a fault in one module (e.g., a shorted FET in a servo drive) can present as a symptom in an adjacent module (e.g., the power supply). DriveKNMS employs a KRC4-specific test bench that replicates the full cabinet backplane environment, allowing each module to be tested under realistic load conditions rather than in isolation. Power supply modules such as the 00-183-926A1-X3 are subjected to: (1) full-load burn-in at 40 A for 4 hours with thermal imaging to identify hotspot anomalies; (2) ripple and noise measurement on the 27 VDC output (specification: 10 MΩ at 500 VDC). Safety boards (KSB) undergo dual-channel diagnostic verification using KUKA’s published safety function test sequences. All test records are retained and available to customers on request.

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© 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.