KONGSBERG WCU LED Control Unit Application Guide

KONGSBERG WCU LED Control Unit Application Guide

Product Overview

WCU LED Control Unit with LED indication is a wall mounted control panel that integrates LED status indication function. It is usually used in ship engine rooms, cockpits, or living areas to achieve status monitoring, alarm indication, or simple control operation of various equipment. As part of the Kongsberg K-Chief ship automation system, WCU LED is capable of real-time communication with the central control system, displaying key parameters and alarm status, and receiving operational instructions. Its design fully considers the special characteristics of the ship environment, such as power fluctuations, vibrations, high humidity, salt spray corrosion, etc., ensuring the reliability of long-term operation.

Detailed analysis of technical specifications

According to the product technical data, the main technical parameters of WCU LED control unit are shown in the following table:

Parameter specification values

Power supply voltage 18-32 VDC

Power consumption 5 W

Working temperature -15 ° C to+70 ° C

Storage temperature -30 ° C to+80 ° C

Maximum relative humidity 97% (no condensation)

Protection level IP 22

Environmental standards IACS E10, IEC 60945

Anti vibration performance 1G

Weight 1.4 kg

Installation method: fix with 4 M4 screws

Dimensions 240 × 144 × 50 mm

Hole size 211 × 138 mm

Type certification DNV, LRS, BV, GL, RINA, NK, ABS, KR, RMR, CCS (as part of K-Chief certification)

Below is a detailed interpretation of each parameter:

Power supply voltage (18-32 VDC)

Ship power grids typically use 24 VDC as the control power source, but the actual voltage may fluctuate due to load changes. WCU LED supports a wide range of input from 18 to 32 VDC, which can adapt to voltage changes during the charging process of ship battery packs and voltage drops caused by long-distance transmission, ensuring the stability of power supply. This wide voltage design complies with the requirements of IEC 60945 for power supply variation, with a typical voltage variation range of ± 10% to ± 20% of the rated value.

Power consumption (5 W)

The extremely low power consumption (5 W) allows WCU LED to generate almost no heat and can work continuously for a long time without the need for additional heat dissipation measures. Meanwhile, the low power consumption characteristic helps to reduce the burden on the ship's DC distribution system, especially suitable for energy sensitive occasions.

Working temperature and storage temperature

The working temperature range of -15 ° C to+70 ° C covers the environmental conditions of most compartments of the ship, including high-temperature areas in the engine room (up to 55 ° C or above near the main engine) and low-temperature environments on the outdoor deck in cold sea areas. The storage temperature range is wider (-30 ° C to+80 ° C), making it easier for equipment to withstand extreme weather conditions during transportation and storage.

Relative humidity (97%, no condensation)

The interior of the ship, especially the engine room and cargo hold, is often in a high humidity environment, with a relative humidity of up to 97% or even higher. WCU LED can withstand high humidity without condensation, which requires good moisture resistance of the housing material and internal circuit, such as three proof paint coating or sealed structure. Meets the requirements of IEC 60945 for wet heat cycle testing.

Protection level IP 22

IP22 indicates that the device can prevent solid foreign objects with a diameter greater than 12.5 mm from entering (such as fingers), and there is no harmful effect on dripping within a 15 ° range from the vertical direction. For equipment installed in areas without direct spray such as the cab, control room, or corridor, IP22 is sufficient to protect against accidental contact and vertical dripping of water droplets. If higher protection is required (such as in the engine room flushing area), a protective cover may need to be installed.

Environmental standards IACS E10 and IEC 60945

IACS E10 is a recommended standard by the International Association of Classification Societies for environmental testing of marine electronic equipment, covering testing requirements such as vibration, temperature, humidity, tilt, sway, salt spray, etc. IEC 60945 is the general requirement of the International Electrotechnical Commission for maritime navigation and wireless communication equipment and systems, including environmental testing methods and performance criteria. Meeting these two standards means that WCU LED has undergone rigorous type testing and can withstand common mechanical stress, climate stress, and electromagnetic interference in ships.

Anti vibration performance (1G)

Vibration testing (1G) is typically conducted under sweep conditions with an amplitude of ± 1 mm from 2 Hz to 13.2 Hz and an acceleration of 0.7g from 13.2 Hz to 100 Hz (according to IEC 60068-2-6). 1G corresponds to an acceleration of 9.8 m/s ², which is sufficient to simulate typical vibrations caused by the main propulsion system and auxiliary equipment of a ship. The 1G index of WCU LED indicates that its structural design and internal components can withstand long-term vibration without fatigue damage or poor contact.

Weight and installation dimensions

The weight of 1.4 kg allows a single person to complete the installation. The external dimensions are 240 × 144 × 50 mm, with an opening size of 211 × 138 mm. It is fixed with 4 M4 screws and suitable for installation in standard control panel or cabin wall openings. The compact thickness (50 mm) makes it easy to embed and install without taking up too much space.

Environmental adaptability and protective design

The challenges of electronic equipment in ship environments mainly come from temperature fluctuations, humidity, salt spray, vibration, and electromagnetic interference. WCU LED addresses these challenges through the following design:

Wide temperature component selection: All electronic components are selected from industrial or automotive grade to ensure stable operation within the range of -15 ° C to+70 ° C.

Moisture proof treatment: The PCB board is coated with three proof paint to prevent condensation and short circuits; The wiring terminals are made of corrosion-resistant materials.

Sealing structure: A sealing gasket may be installed between the front panel and the rear shell to prevent water droplets from seeping in and meet IP22 requirements.

Anti vibration design: Internal components are fixed with glue or reinforced welding, and connectors are equipped with locking mechanisms to prevent vibration loosening.

IEC 60945 also specifies requirements for radiated emission, conducted emission, and immunity to interference, ensuring that the equipment does not interfere with other electronic devices on board and can withstand electromagnetic interference from radar, radio transmitters, and other sources.

Certification and Compliance

WCU LED has received type approval from major global classification societies, including:

DNV (Norwegian Classification Society)

LRS (Lloyd's Register of Shipping)

BV (French Classification Society)

GL (German Lloyd's, now merged with DNV)

RINA (Italian Classification Society)

NK (Japan Classification Society)

ABS (American Bureau of Shipping)

KR (Korea Classification Society)

RMR (Russian Maritime Registry)

CCS (China Classification Society)

These certifications indicate that the product design, manufacturing, and testing comply with the regulatory requirements of various classification societies and can be directly installed on classified ships without additional inspection. As part of the K-Chief system, the certification scope means that WCU LED has passed integration testing with the Kongsberg automation system as a whole, ensuring compatibility and reliability with the system.

Application field

WCU LED control units are widely used in various types of ship automation systems, with typical applications including:

Cabin monitoring and alarm system: As a local alarm indicator panel, it displays the operating status and alarm signals of equipment such as the main engine, generator, and auxiliary engines. The LED indicator lights can display normal, warning, alarm and other statuses respectively, and the operator can confirm or reset the alarm through the buttons on the panel.

Lighting and ventilation control: In living areas or work cabins, WCU LED can serve as a local control panel for lighting or fans, starting and stopping equipment through buttons, and using LED to indicate the current status.

Liquid level and temperature monitoring: Connect liquid level sensors or temperature sensors to display real-time tank liquid level or key temperature values (if with digital display), and issue sound and light alarms when exceeding the limit.

Valve remote control: In cargo oil systems or ballast water systems, WCU LED can be used to control the opening and closing of valves, and indicate valve position (open/closed/faulty) through LED.

Security system interface: linked with fire detection system and combustible gas detection system, providing local alarm indication in hazardous areas.

Due to the fact that WCU LED only consumes 5 W of power and has a wide voltage input, it can be directly powered by a 24 VDC battery pack. Even if the main power supply loses power, it can still rely on emergency power to continue working, ensuring that critical monitoring functions are not interrupted.

Installation and Maintenance Guide

Proper installation and regular maintenance are key to ensuring the long-term reliable operation of WCU LEDs. The following recommendations are based on product specifications and industry best practices:

Installation location selection: It should be selected in a dry, non direct spray, and non violent impact location, avoiding installation near heat sources (such as steam pipelines) or enclosed spaces with poor ventilation. Ensure that there is sufficient space around the device for wiring and heat dissipation.

Drilling and fixing: Drill holes on the control panel or cabin wall according to the opening size of 211 × 138 mm, embed the equipment and fix it with 4 M4 stainless steel screws to prevent corrosion. The tightening torque of screws should follow the manufacturer's recommended value (usually around 1.2 Nm) to avoid deformation of the housing caused by over tightening.

Electrical connection: The power cord should be a marine cable with an appropriate cross-sectional area (recommended 0.75-1.5 mm ²), and the terminal block should be crimped with a wire nose and tightened. Pay attention to correct polarity and ensure reliable grounding (if necessary). The signal line should be laid separately from the power line to avoid interference.

Environmental protection: If installed in areas that may be exposed to dripping or splashing water, it is recommended to install waterproof covers or choose products with higher protection levels. Regularly inspect the panel seals for aging and replace them if necessary.

Maintenance inspection: During daily inspections, pay attention to observing whether the LED indicator lights are lit up normally and whether the button movements are flexible. Conduct functional testing at least once a year to simulate alarm conditions and verify response. When cleaning the panel, a soft cloth dipped in neutral cleaning agent should be used to avoid using solvents or abrasive materials.

Spare parts and maintenance: Due to the complexity of internal circuits, component level maintenance is usually not carried out on site. When a malfunction occurs, it should be replaced as a whole and the faulty part should be returned to the manufacturer for repair. It is recommended that the ship reserve a small amount of spare parts to cope with emergency situations.