TERASAKI WATCH-FREE® SYSTEM WE500 – Marine Engine Room Alarm & Monitoring System, Dual LCD Main Console and EMB Series Spare Parts

Product Image — Original SM MARINE SERVICE™ Photograph

The supplied photograph shows the original blue dual-screen TERASAKI WE500 console powered on, with both displays showing the Watch-free system interface. Only SM MARINE SERVICE™ photographs are used for this blog.

Product Information

Important condition note: The photograph demonstrates that both displays were powered on and showed the WE500 interface. It does not independently establish that all monitoring channels, redundant CPUs, touch functions, alarms, communication links and internal modules passed full functional testing.

Product Introduction

The TERASAKI Watch-free® System WE500 is a marine engine room alarm and monitoring system developed for supervising machinery operating conditions aboard ships.

It provides engineers and watchkeeping personnel with a centralized interface for monitoring important machinery parameters, reviewing alarms and observing the status of connected equipment.

The system is associated with engine control room installations and may form part of an approved unmanned machinery space (UMS) arrangement, depending on the vessel's configuration and classification requirements.

The photographed unit features two adjacent LCD displays, a blue industrial console housing, alarm acknowledgement controls and separate left/right system selection indicators.

SM MARINE SERVICE™ supplies marine automation and monitoring equipment, including used TERASAKI WE500 equipment and sourcing support for associated electronic modules.

International buyers can submit equipment inquiries through www.smmarineservice.com.

What Is the TERASAKI WE500 Watch-free System?

The WE500 is a centralized machinery alarm and monitoring platform. It receives signals from connected field equipment, processes them according to the configured monitoring logic and presents operating information to engineers.

Depending on the vessel installation, the system can monitor machinery such as:

• Main propulsion engine and associated auxiliaries

• Auxiliary diesel generators

• Boiler and burner-related monitoring points

• Cooling water, lubricating oil and fuel systems

• Pumps and associated machinery

• Tank levels and temperatures

• Machinery pressures and temperature sensors

• Alarm contacts and equipment status signals

For example, when a monitored temperature or pressure crosses its configured alarm limit, the monitoring system may generate a visual and audible alarm, record the event and transmit the relevant notification to connected extension alarm equipment.

A UMS arrangement may also include alarm distribution to the bridge and engineers' accommodation spaces. The complete arrangement and alarm routing depend on the ship's approved installation.

Main Features

The following functions are described in the supplied WE500 product reference information. The individual unit's installed options and configuration should be checked before replacement.

Dual-System Architecture

The WE500 is described as using redundant control processing with standby capability and mutual supervision.

The photographed console clearly includes LEFT SYSTEM and RIGHT SYSTEM operating controls, each with its own status indications.

This architecture is intended to improve monitoring availability, but the redundancy of the photographed unit has not been functionally verified.

Touchscreen Monitoring Interface

The system uses a graphical operator interface for viewing machinery measurements, alarm records and other monitoring information.

The visible screen navigation tabs include:

Data • Bar • Log • Free • Trend • Change • System

Machinery Alarm Management

The system supports alarm presentation, acknowledgement and event review.

The photographed console has dedicated Buzzer Stop and Flicker Stop controls, allowing authorized operators to acknowledge specific alarm indications according to the system's configured behavior.

Distributed Monitoring

The supplied system description identifies TERASAKI Fieldbus communication with field transmitter/receiver equipment for digital and analog signal acquisition.

Expandable I/O

The supplied WE500 reference data describes configurations supporting up to:

• 784 digital I/O points

• 384 analog points

• 8 pulse points

These are supplied system-level figures, not a verified count of channels installed in the photographed console.

Communication and External Equipment

Depending on the installed options, the WE500 may interface with external computers, extension alarm equipment, printers and serial communication devices.

Monitoring and Recording Functions

The supplied description identifies data displays, bar graphs, alarm/event logs, trend displays and optional printing functions.

These functions help engineers assess machinery conditions and investigate recurring operating problems.

Front Panel Controls & Display Identification

The original photograph provides useful information about the WE500 operator interface.

The photograph also shows Japanese-language labels attached to the console. These should be preserved as part of the original equipment identification.

Observed WE500 Software Information

Both displays show the Watch-free WE500 startup/system interface.

The displayed date is part of the equipment's stored or operating screen information. It is not evidence of the photograph's capture date or the date of the latest functional test.

The vessel name is also a stored system field and should not be interpreted as proof of the unit's complete installation history.

Main Technical Specifications

Specification clarification: The I/O capacities and communication options describe the supplied WE500 system reference. They should not be interpreted as a guarantee that the photographed equipment contains every optional module or supports the maximum channel count.

Main Components & Associated Part Numbers

The WE500 uses a modular electronic architecture. Correct module identification is essential because replacement parts must match the installed system hardware, software and communication arrangement.

TERASAKI EMB-4031A – WE500 Main Unit

The EMB-4031A is identified in the supplied product information as the main unit reference for the WE500.

It forms part of the central monitoring equipment and works with the relevant CPU, graphic, communication and field interface modules.

The exact EMB-4031A identification should be confirmed from the original nameplate before shipment.

TERASAKI EMB-4131A – CPU Module

The EMB-4131A is identified as a CPU module.

Its role is associated with system processing, monitoring logic and coordination of connected interfaces.

When sourcing a replacement CPU, the buyer should provide the original module label and software information. A replacement card may require configuration or software compatibility checks.

TERASAKI EMB-4231 – PIO Module

The EMB-4231 is identified as a parallel I/O module.

It is associated with digital input/output interfacing within the WE500 architecture.

TERASAKI EMB-4432 – Graphic Module

The EMB-4432 is identified as a graphic module.

This component is associated with the system's graphical display functionality. A blank or abnormal LCD image does not automatically prove that the graphic module is defective; the display, supply and connecting cables must also be examined.

TERASAKI EMB-4531 – SIO Module

The EMB-4531 is identified as a serial I/O module.

Its functions relate to serial communications within the system's configured architecture.

TERASAKI EMB-4731 – TM / TMA Master Module

The EMB-4731 is identified as a TM/TMA master module.

It is associated with field communication and data acquisition functions. Communication failures involving connected field equipment may require inspection of this module, the fieldbus network and external units.

TERASAKI EMB-4931 – Lamp Module

The EMB-4931 is identified as a lamp module, associated with indication functions in the monitoring system.

TERASAKI TRNC-01S-3 – LCD Monitor

The TRNC-01S-3 is listed as an LCD monitor reference.

Customers searching for a replacement screen should confirm the original LCD model, connector arrangement, physical dimensions and display compatibility.

TERASAKI AJ1252 – DC-DC Converter

The AJ1252 is identified as a DC-DC converter used in the relevant equipment family.

A power supply problem should be investigated using the actual electrical drawings and component ratings.

TERASAKI K/076/10-001A – Operating Panel

This part number is identified in the supplied reference as an operating panel assembly.

TERASAKI K/076/11-001 – Connector Panel

This reference identifies a connector panel assembly associated with the equipment.

Complete Module Identification Table

Parts verification: These identifiers are provided in the user's technical product information. The internal part labels are not visible in the supplied exterior photograph. Their presence inside this particular console and individual stock availability require confirmation.

Additional Product Image — Original WE500 Screen Details

Marine & Industrial Applications

Marine Engine Control Rooms

The WE500 is intended for centralized machinery monitoring from a ship's engine control room.

Engineers can use the monitoring interface to review operating measurements, investigate alarms and assess machinery conditions.

Unmanned Machinery Space (UMS) Arrangements

On vessels approved for periodically unattended machinery operation, alarm and monitoring equipment is an important part of the overall safety arrangement.

A correctly configured monitoring system can transmit relevant machinery alarms to designated watchkeeping locations, including extension alarm panels.

However, a working WE500 display alone does not establish UMS compliance. The complete alarm distribution system, redundancy, power supplies and required tests must satisfy the vessel's applicable requirements.

Main Engine Monitoring

The WE500 may receive signals associated with main engine temperature, pressure, status and auxiliary equipment.

Auxiliary Generator Monitoring

Generator-related inputs can include operating status, temperatures, pressures and other machinery alarm signals.

Boiler and Auxiliary Machinery Monitoring

The system may monitor connected boilers, pumps, compressors, cooling systems and associated equipment, depending on the vessel's configured I/O points.

Vessel Types

Typical applications include bulk carriers, tankers, container vessels, car carriers and other merchant ships fitted with compatible TERASAKI monitoring systems.

Common Problems & Troubleshooting

Faults involving an engine room monitoring console can originate in the display assembly, CPU, power supply, communication network, field equipment or connected wiring.

Important: Alarm and monitoring equipment is part of a ship's machinery safety arrangement. Repairs must be performed by qualified personnel using approved isolation and maintenance procedures. Do not suppress alarms, bypass safety functions or disconnect field signals simply to clear a fault.

Common Alarms & Fault Indicators

The supplied photograph shows an active alarm window on the left screen.

Two visible alarm entries are:

These are actual displayed alarm entries in the supplied photograph, not invented examples.

The top status areas also show alarm counts of 4 on the left display and 2 on the right display.

The photograph does not establish the causes of these alarms or whether they remain present in the equipment's current operating condition.

The physical console also includes Run, Main and Fail indicators for the left and right systems. These help operators observe the selected operating side and system status.

The exact behavior of these indications should be interpreted using the installed WE500 configuration.

Maintenance Tips for TERASAKI WE500

Regular inspection and controlled maintenance can help reduce failures in a marine machinery monitoring system.

• Inspect both LCD displays for abnormal brightness, image distortion and touch-response problems.

• Check the condition of the operator keypad, selector switch and alarm acknowledgement buttons.

• Inspect internal modules and electrical connectors during approved maintenance.

• Verify the health of the left and right monitoring systems.

• Investigate fieldbus communication interruptions and missing monitoring data.

• Preserve the existing software version and configuration records.

• Maintain approved backups of monitoring point data where available.

• Inspect connected printers and extension alarm equipment.

• Verify selected machinery readings against reliable reference instruments.

• Perform approved alarm and redundancy tests following maintenance or component replacement.

Do not replace CPU or communication modules without first checking hardware compatibility and the installed software configuration.

Spare Parts & Replacement Availability

SM MARINE SERVICE™ offers a used TERASAKI Watch-free WE500 dual-screen monitoring console and handles inquiries for associated electronic modules and replacement components.

Information Required for a Quotation

For an accurate replacement inquiry, customers should provide the original equipment's model and type plate, the required EMB module or part number, system and screen software versions, photographs of the existing unit, and the delivery destination.

If a specific component has failed, a photograph of the displayed alarm or fault information can also be helpful.

Visit SM MARINE SERVICE™ for marine automation equipment inquiries and international spare-parts sourcing.

Why the TERASAKI WE500 Is Still Used

Many vessels continue operating with their original machinery alarm and monitoring systems because these systems are integrated into the ship's engine room sensors, communication networks, alarm distribution equipment and operating procedures.

For an installed WE500 system, replacing a compatible failed module may be preferable to redesigning the entire monitoring arrangement.

However, replacement work requires careful attention to:

• Hardware and module revisions

• System and screen software versions

• Existing monitoring point configuration

• Fieldbus communication compatibility

• LCD and operating panel connections

• Redundant system operation

• Alarm routing and classification requirements

A physically similar electronic module is not necessarily a suitable replacement. The original equipment identification should always be checked before purchase.

Frequently Asked Questions (FAQ)

What is the TERASAKI WE500 Watch-free system?

It is a marine machinery alarm and monitoring system used to supervise engine room equipment and display operating conditions and alarms.

Who manufactures the WE500?

The manufacturer is TERASAKI ELECTRIC CO., LTD., a Japanese marine electrical equipment manufacturer.

What is the main unit type of the WE500?

The supplied product information identifies EMB-4031A as the main unit type. The original type plate should be checked for the exact unit being replaced.

Does the WE500 have redundant monitoring systems?

The supplied technical information describes a redundant system architecture, and the photographed console has separate left/right system controls. Full redundancy testing of this unit has not been independently verified.

What software version is visible on the supplied unit?

The photograph shows System Version 1.04 and Screen Version 1.02.

What are EMB-4131A and EMB-4432?

EMB-4131A is identified as a CPU module, while EMB-4432 is identified as a graphic module in the supplied parts reference.

Can I replace only the LCD monitor?

A compatible LCD assembly may be replaceable, but the exact display model, interface and physical arrangement must be confirmed first.

What alarms are visible in the photograph?

The left display shows ALARM PRINTER FAILURE and COMBO PRINTER FAILURE, among its displayed alarm information.

Does the photograph prove that the complete system is fully tested?

No. It shows that both displays were powered on and displaying the WE500 interface. Full functional and redundancy testing requires additional checks.

Can the WE500 be used on UMS vessels?

The system is associated with machinery alarm and monitoring arrangements that may support UMS operation. Suitability depends on the vessel's approved configuration and applicable requirements.

Are individual WE500 modules available?

SM MARINE SERVICE™ handles inquiries for individual WE500 modules. Exact part numbers, quantities and availability should be confirmed.

Where can I buy a used TERASAKI WE500 system?

Contact SM MARINE SERVICE™ through www.smmarineservice.com for a quotation on the reported used dual-screen console or associated spare parts.

Short Product Description

The TERASAKI Watch-free® System WE500 is a marine engine room alarm and monitoring system designed for centralized machinery supervision and alarm management. The supplied equipment is a used dual-LCD monitoring console with left and right system controls, alarm acknowledgement buttons and graphical monitoring displays. Both screens are shown powered on with System Version 1.04 and Screen Version 1.02. Related component references include EMB-4031A, EMB-4131A, EMB-4231, EMB-4432, EMB-4531, EMB-4731 and EMB-4931. SM MARINE SERVICE™ welcomes international inquiries for complete WE500 equipment and compatible replacement modules, subject to identification and availability confirmation.

SM MARINE SERVICE™ COMPANY & CONTACT DETAILS

SM MARINE SERVICE™
Marine Automation & Navigation Equipment Supplier

Available Equipment Conditions:
New Equipment • Used Equipment • Refurbished Equipment • Reconditioned Equipment

Specific product condition and availability are subject to confirmation.

Stock Locations:
Bangladesh • China

Services:
Worldwide Shipping • Technical Support • Spare Parts Supply • Marine Equipment Sourcing

Contact Information

SM MARINE SERVICE™
Samir Market, DT Road, Pahartali, beside CDA Market, Chattogram, Bangladesh

Mobile / WhatsApp / Viber: +88 01818 929292
Email: info@smmarineservice.com
Website: www.smmarineservice.com

For quotations on the TERASAKI WE500 Watch-free System, complete dual-screen monitoring consoles, CPU modules, graphic modules, LCD monitors, communication modules and other marine automation spare parts, contact SM MARINE SERVICE™ with your equipment identification, required quantity and shipping destination.

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