Description
Product Overview
The Kongsberg RCU502i 421768 is a Remote Control Unit used in Kongsberg marine automation installations. It is identified in manufacturer type-approval documentation as a controller associated with the K-Chief marine automation system. In a distributed control architecture, remote controller hardware provides a control-system component between field-level equipment and the wider automation environment. Its role within a specific vessel depends on the system design, installed software, connected equipment, and configured control functions.
For maintenance and procurement teams, the distinction between the RCU502i and other RCU-series units is important. Kongsberg documentation lists the RCU502i separately from the RCU501, RCU502, and RCU602. These model numbers should not be treated as interchangeable simply because they share the RCU designation. The manufacturer’s documentation identifies hardware description number 408644 for the RCU502i, providing an additional reference for checking the correct hardware and documentation revision.
The Kongsberg RCU502i 421768 should be specified by its full part number and revision when sourcing a replacement. A visually similar controller may have a different hardware configuration or system role. Before installation, verify the existing controller’s label, system configuration, connected I/O equipment, communication connections, and approved software configuration. The available type-approval records identify an IP20 protection classification and a 300 mm dimension entry in the relevant equipment listing; they do not establish every electrical or performance specification needed for a safe replacement.
Product Introduction (Non-Templated)
In marine automation maintenance, replacing a controller is not simply a matter of matching its external dimensions. The replacement must correspond to the vessel’s installed control architecture, hardware revision, configuration, and connected equipment. For the RCU502i, part number 421768 and hardware description number 408644 are useful identification references when checking procurement documents and equipment labels.
A controller fault can affect monitoring and control functions beyond the module itself. Before removing an installed unit, record its revision and serial number, document all connections, and confirm the system’s approved recovery and commissioning procedure. Do not assume another RCU-series model is a direct substitute.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | RCU502i |
| Part Number | 421768 |
| Manufacturer | Kongsberg Maritime |
| Product Type | Remote Control Unit / Controller |
| System Association | K-Chief marine automation |
| Hardware Description No. | 408644 |
| Equipment Classification | Controller |
| Protection Classification | IP20 |
| Type-Approval Dimension Entry | 300 mm |
| Processor Architecture | Not verified |
| Rated Supply Voltage | Not verified |
| Power Consumption | Not verified |
| Communication Protocol | Not verified |
| Communication Interfaces | Not verified |
| I/O Channel Capacity | Not verified |
| Operating Temperature | Not verified |
| Storage Temperature | Not verified |
| Mounting Method | Confirm against hardware documentation |
| Firmware Compatibility | Confirm against installed system configuration |
The manufacturer type-approval records support the model, part number, hardware description number, and IP20 classification. Other electrical and performance values should be checked against Kongsberg hardware documentation rather than inferred from third-party descriptions.
RCU502I 421768
Major Features and Engineering Advantages
Identifiable hardware specification
The combination of RCU502i, part number 421768, and hardware description number 408644 provides a useful identification basis. These details help maintenance teams distinguish the correct controller from other RCU-series hardware.
Marine automation application
The RCU502i is documented as part of Kongsberg’s marine controller equipment. Its application should be assessed within the vessel’s installed automation architecture, not as a generic standalone PLC.
Documented equipment classification
Manufacturer type-approval records list the RCU502i under the controller category. This helps procurement teams establish the equipment’s documented role when reviewing vessel equipment lists and technical records.
IP20 installation classification
The manufacturer’s equipment listing identifies IP20. This is a cabinet or protected-equipment installation classification, not a weatherproof or washdown rating. The installation environment must provide the necessary protection against dust and water exposure.
Revision-specific replacement checks
The part number alone may not establish complete compatibility. Comparing the hardware revision, serial number, configuration, and system documentation helps reduce the risk of installing an unsuitable controller.
Maintenance documentation traceability
The hardware description number 408644 is an additional reference for documentation searches and engineering records. Keeping this number with the part number can improve traceability during maintenance planning.
Related Products
The following are related Kongsberg marine automation components or controller models. They are not confirmed drop-in replacements for RCU502i.
- RCU501 – Kongsberg Remote Control Unit listed separately in marine automation documentation.
- RCU502 – Related RCU-series controller with a distinct part number.
- RCU602 – Another Kongsberg controller model listed in the same equipment documentation.
- RMP420 – Kongsberg Remote Multi-Purpose I/O module.
- RMP420S – Related remote I/O hardware.
- RDIOR420 – Remote Digital I/O Relay module.
- RDIO420S – Remote Digital I/O module.
- RMP422i – Kongsberg remote I/O-related module.
- RMP422Si – Related Kongsberg remote I/O hardware.
The manufacturer equipment lists identify these as separate products. Confirm system compatibility and configuration requirements before considering any alternative.
Frequently Asked Questions
Q1: What is the Kongsberg RCU502i 421768?
It is a Kongsberg Remote Control Unit identified in manufacturer documentation as a controller associated with marine automation equipment. Its precise function in a particular vessel depends on the installed system configuration.
Q2: Is RCU502i part number 421768 used in K-Chief systems?
Yes. Manufacturer equipment and type-approval documentation lists RCU502i, part number 421768, in the K-Chief marine automation equipment context. Confirm the specific K-Chief system generation and vessel configuration before replacement.
Q3: Can RCU502i replace an RCU501 or RCU502?
Do not assume direct interchangeability. The manufacturer lists these as distinct controller models. Compare hardware descriptions, system configuration, software requirements, and connected equipment before approving a substitution.
Q4: Can I hot-swap the RCU502i?
Hot-swapping should not be assumed. Follow the vessel’s approved shutdown, isolation, redundancy, and controller replacement procedures. Confirm whether the installed system supports controller removal while energized before carrying out the work.
Q5: Does the RCU502i support firmware v3.1?
A general firmware v3.1 compatibility claim cannot be confirmed from the available manufacturer records. Check the installed software release, controller hardware revision, and applicable Kongsberg system documentation.
Q6: What should I verify before purchasing RCU502i 421768?
Request photographs of the complete nameplate, part number, hardware revision, and serial number. Compare these details with the removed controller and the vessel’s equipment list. Also request confirmation of tested operating condition and any repair history.
Q7: What does IP20 mean for the RCU502i?
indicates protection against access to hazardous parts with a finger and against solid objects of 12.5 mm or larger. It does not provide water-ingress protection. The controller should be installed in an appropriately protected enclosure.
Procurement and Quality Control Notes
For Kongsberg RCU502i 421768, the main procurement risk is hardware or configuration mismatch. Before confirming an order, request:
- Clear photographs of the front, rear, connectors, and nameplate.
- Confirmation of part number 421768.
- Hardware revision and serial number.
- Confirmation of the hardware description number, 408644, where applicable.
- Power-on and functional test results.
- Disclosure of repair history and replaced components.
- Written condition classification: new, unused, refurbished, or used.
- Warranty terms and return conditions.
Engineering recommendation: Match the replacement against the installed controller’s full identification label and vessel equipment documentation. Do not approve an RCU501, RCU502, or RCU602 as a substitute based on series naming alone.
