KONGSBERG RCU Series Modules

Technical Dossier

Product Details And Specifications

KONGSBERG RCU Series: Comprehensive Module Range and Technical Overview

The KONGSBERG RCU (Remote Control Unit) series is a purpose-engineered line of control and interface modules developed by Kongsberg Maritime and Kongsberg Digital for deployment in safety-critical and process-intensive industrial environments. These units are embedded across global heavy industry installations including offshore oil and gas platforms, petrochemical refineries, LNG terminals, nuclear auxiliary systems, and marine vessel automation systems. The RCU series functions as the operator interface and remote I/O backbone within Kongsberg's broader K-Chief, SDP, and CAMS distributed control architectures. Installed base spans multiple decades, with active units still operating in facilities commissioned in the 1990s through the 2010s.

The Evolution of RCU Series Architecture

The RCU series originated as a modular remote operator station concept within Kongsberg's maritime automation division. Early-generation units (RCU100–RCU300 range) used proprietary serial bus communication protocols and were designed for standalone panel integration aboard vessels and in onshore control rooms. These units relied on RS-422 and RS-485 physical layers with Kongsberg-specific framing, limiting interoperability with third-party SCADA systems.

Mid-generation RCU modules (RCU400–RCU500 range) introduced dual-redundant communication paths and began supporting Modbus RTU as a secondary protocol, enabling integration with third-party DCS platforms. Hardware architecture shifted to surface-mount PCB construction, improving vibration tolerance for marine applications.

The RCU600 generation — which includes the RCU602 — represents the mature phase of the series. These units feature enhanced EMC shielding, wider operating temperature ranges (-20°C to +70°C), and support for both legacy serial and Ethernet-based supervisory links. The RCU602 specifically is a dual-channel remote control unit used for joystick and lever input processing in dynamic positioning (DP) and thruster control systems. As of 2026, the RCU600 series is in the mature/end-of-active-production phase; Kongsberg has transitioned new projects to the K-Thrust and K-Pos next-generation platforms. However, the installed base of RCU600-series hardware remains extensive, and long-term maintenance support is a primary operational requirement for fleet operators and plant managers.

RCU Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly sourced models within the KONGSBERG RCU product family. Units are categorized by primary function:

Remote Control & Operator Interface Units

• RCU602: Dual-channel remote control unit for DP joystick and thruster lever input processing
• RCU601: Single-channel remote control unit, panel-mount operator interface for vessel automation
• RCU603: Triple-redundant remote control unit for safety-rated DP Class 3 installations
• RCU604: Remote control unit with integrated display interface for K-Chief 600 systems
• RCU500: Mid-generation remote control unit with Modbus RTU secondary protocol support
• RCU502: Dual-output remote control unit for twin-engine vessel thruster configurations

I/O and Signal Conditioning Modules

• RCU410: Analog input module, 8-channel, 4–20 mA, for sensor signal aggregation
• RCU411: Analog output module, 4-channel, 0–10 V, for actuator drive signals
• RCU420: Digital input module, 16-channel, 24 VDC, for discrete status monitoring
• RCU421: Digital output module, 16-channel, relay contact, for alarm and interlock outputs
• RCU430: Combined AI/DI module, 8+8 channel, for compact panel installations

Communication and Bus Adapter Modules

• RCU310: Serial communication adapter, RS-422/RS-485, for legacy Kongsberg bus integration
• RCU311: Dual-port serial adapter with protocol conversion for Modbus RTU bridging
• RCU320: Ethernet gateway module for supervisory SCADA link over TCP/IP

Power Supply Modules

• RCU201: 24 VDC regulated power supply module, 5 A, for RCU backplane distribution
• RCU202: Redundant power supply module with automatic switchover for continuous operation

Sourcing Hard-to-Find & Obsolete RCU Series Parts

DriveKNMS maintains a dedicated inventory program for KONGSBERG RCU series modules that have reached end-of-active-production status. For operators running K-Chief, SDP, or CAMS systems built on RCU400–RCU600 hardware, replacement sourcing through the original manufacturer is no longer guaranteed on standard lead times. DriveKNMS sources RCU series units through verified secondary market channels, decommissioned vessel inventories, and authorized refurbishment pipelines.

All sourced units are cross-referenced against Kongsberg part number databases and engineering change notice (ECN) records to confirm hardware revision compatibility. For safety-critical applications — including DP Class 2 and Class 3 installations — DriveKNMS provides full documentation packages including test reports, revision history, and traceability records upon request. Customers operating under ISM Code or IEC 61511 functional safety frameworks can request compliance documentation as part of the procurement process.

Quality Control for the RCU Series Range

KONGSBERG RCU series modules incorporate proprietary backplane bus architectures and multi-layer PCB designs that require specialized test procedures beyond standard bench power-on verification. DriveKNMS applies the following test protocol to all RCU series units processed through its facility:

• Backplane Bus Integrity Test: Each module is seated in a Kongsberg-compatible test rack and subjected to full bus communication cycling to verify address recognition, data throughput, and error-free frame transmission.
• Channel-Level Functional Verification: For I/O modules, each individual channel is exercised across its full input/output range. Analog channels are verified at 0%, 25%, 50%, 75%, and 100% of rated span. Digital channels are cycled through open and closed states with contact resistance measurement.
• Communication Protocol Validation: Serial and Ethernet communication modules are tested against a reference Kongsberg controller to confirm correct protocol handshake, baud rate negotiation, and data integrity under simulated load.
• Thermal Cycling: Units intended for marine or offshore deployment are subjected to thermal cycling between -10°C and +60°C to identify latent solder joint or component failures.
• Visual and Component Inspection: All PCBs are inspected under magnification for corrosion, capacitor bulge, trace damage, and non-original component substitution prior to functional testing.