JRCS LCU-M400B PCB Card
JRCS / Japan marine control equipment
New product
The JRCS LCU-M400B is a marine electronic control PCB used in JRCS Local Control Unit and automation applications.
The actual SM MARINE SERVICE™ stock photograph clearly shows:
Manufacturer / Brand: JRCS
Model: LCU-M400B
Product Type: PCB Card / Control Circuit Board / Interface Board
Application Category: Marine Automation / Local Control Unit
Visible Board Marking: LCU-M400B
Independent marine spare-part references identify the same model as a JRCS LCU-M400B PCB Card, while other suppliers describe it more specifically as an Analogue Interface PCB or Control Circuit Board.
The LCU-M400B is an electronic printed circuit board associated with JRCS Local Control Unit systems.
Its purpose is to provide control/interface functions inside a larger automation architecture. Depending on the vessel and installed system, this can involve:
Signal interfacing
Relay/control outputs
Local control functions
Automation system communication
Input/output processing
The exact channel allocation and function must be verified from the vessel's JRCS drawings because the same board can appear in different control-system contexts.
A current marine spare-parts listing describes the LCU-M400B specifically as:
This is an important keyword because many buyers do not search only by PCB Card. They may search:
JRCS Analogue Interface
LCU-M400B Analog Interface
JRCS Local Control Unit Interface PCB
Using both spellings—analogue and analog—improves global search coverage.
Another current supplier describes the board as:
and associates it with Local Control Unit systems.
That description fits the physical PCB shown in the stock photograph, which contains relay modules, integrated circuits, connectors and interface circuitry.
A separate marine listing identifies the same product family with additional references:
LCU-M400B-2
19E 07763-A
These are useful purchasing and SEO references.
However, they should not automatically be treated as proof that every LCU-M400B, LCU-M400B-2 or 19E 07763-A revision is identical.
For replacement, verify:
Full model
Board marking
Revision
Connector layout
System application
Front and rear photographs
A recent trade-data record describes:
“Control board for boiler system on oil tanker PN: LCU-M400B, 100% brand new”
supplied by JRCS Co., Ltd. from Japan.
This is a useful real-world application reference and makes the following search phrases relevant:
JRCS LCU-M400B Boiler Control Board
JRCS Oil Tanker Boiler PCB
LCU-M400B Boiler Automation Card
However, this does not mean every LCU-M400B is universally used only for boilers. Application depends on the vessel's JRCS system.
The pictured LCU-M400B contains a mixture of:
Integrated circuits
Relay modules
Resistors and capacitors
Power/interface components
Multi-pin board connector
Control and signal-routing circuitry
One aftermarket technical listing identifies BA10324A ICs and PDS-24121C relay modules on an LCU-M400B example.
Because PCB component population can change by revision, component-level replacement should always be based on the exact board rather than only a generic web photo.
JRCS has many similarly named LCU cards.
For example, related SM MARINE SERVICE™ inventory/search references include:
LCU-TMDI-L
LCU-TMRY
LCU-TMRY-R
LCU-M01A
LCU-M01B
LCU-M01B-1
LCU-M01A-22
LCU-M01A-32
LCU-M01B-32
LCU-M01B-32C
LCU-M400B
These are different model references and should not be assumed interchangeable.
For a wider JRCS PCB family reference, SM MARINE SERVICE™ also maintains a dedicated JRCS PCB page:
https://www.smmarineservice.com/product-view/1084/10
That page already includes LCU-M400B among many other JRCS PCB models.
Beyond LCU-M400B, many vessel operators search JRCS parts only by board number.
Relevant JRCS stock/search families include:
LCU Series
JSTD Series
SMS Series
JMD Series
ESB Series
JEC Series
JBC Series
LDI Series
VMJ / VMI Series
SCU / EXT / JAC Series
A broad related-model strategy is useful because a buyer may search for one JRCS board while actually needing another board from the same cabinet or automation system.
The SM MARINE SERVICE™ JRCS PCB family page is available through:
The JRCS LCU-M400B may be found in shipboard automation environments involving:
Exact application depends on the vessel's installed JRCS system.
Check:
Incoming control power
Backplane/connector supply
Connector seating
Fuse/protection circuit
Power-conditioning components
Do not assume board failure until the external supply has been verified.
Check:
Relay output
Associated relay driver circuit
Connector pin
External wiring
Command/input logic
A single missing output may be caused by a field-side issue rather than the PCB itself.
Possible causes include:
Common supply problem
Board connector fault
Logic IC fault
Power rail failure
Backplane connection problem
Inspect:
Connector oxidation
Loose PCB seating
Dry/cracked solder joints
Relay wear
Aged electrolytic capacitors
Vibration damage
Legacy marine PCBs can develop intermittent faults that only appear under heat or vibration.
If a relay command is present but the output does not switch, verify:
Relay coil drive
Relay contact continuity
Associated transistor/driver IC
External load
If LCU-M400B is installed in a boiler-control application, do not diagnose the PCB alone.
Also check:
Sensors
Burner permissives
Field relays
Interlocks
PLC/central controller
Wiring
The board is only one element in the larger control sequence.
Before ordering a replacement JRCS LCU-M400B, confirm:
Manufacturer: JRCS
Model: LCU-M400B
Related Marking: LCU-M400B-2 where applicable
Related Reference: 19E 07763-A where applicable
PCB Revision: if visible
Connector Arrangement: compare carefully
System Application: Local Control Unit / boiler / automation system
Front Photograph: recommended
Rear Photograph: recommended
Vessel/System Drawing: useful
Do not select a replacement solely by appearance.
SM MARINE SERVICE™ supplies and sources JRCS LCU-M400B PCB cards, control boards, analogue interface boards and other JRCS marine automation PCBs.
Important enquiry references include:
JRCS LCU-M400B
LCU-M400B-2
19E 07763-A
JRCS Analogue Interface PCB
JRCS Local Control Unit PCB
JRCS Boiler Control Board
Available condition may include:
New • Used • Refurbished • Reconditioned • Tested Working
For worldwide JRCS PCB sourcing, buyers can also check:
It is a JRCS marine PCB card used in Local Control Unit / automation systems and described in current market references as a control circuit board or analogue interface PCB.
Yes. Multiple marine suppliers list the exact model as JRCS LCU-M400B PCB Card.
Yes. One current listing specifically calls it JRCS LCU-M400B Analogue Interface PCB.
A recent shipment record identifies LCU-M400B as a control board for a boiler system on an oil tanker. This proves at least one documented application, but not universal use on all installations.
It is a related model/reference appearing in marine spare-parts listings alongside LCU-M400B.
It is another reference published with LCU-M400B / LCU-M400B-2 in current marine inventory.
Do not assume that. Different LCU model numbers can have different functions, hardware and revisions.
Yes. Its dedicated JRCS PCB page lists many LCU, JSTD, SMS, JMD and other JRCS board families.
SM MARINE SERVICE™ supplies and sources JRCS marine automation and PCB spare parts for worldwide customers.
JRCS LCU-M400B Marine PCB Card / Control Circuit Board for Local Control Unit and ship automation applications. The model is also marketed as an Analogue Interface PCB and appears in documented oil-tanker boiler-control applications. Related search references include LCU-M400B-2 and 19E 07763-A. Suitable for replacement and sourcing enquiries involving JRCS marine automation, control-panel and Local Control Unit systems. New, Used, Refurbished and Reconditioned JRCS PCB cards available from SM MARINE SERVICE™ with worldwide shipping and technical support.
Marine Automation & Navigation Equipment Supplier
Available Condition:
• New Equipment • Used Equipment • Refurbished Equipment • Reconditioned Equipment
Stock Location:
• Bangladesh • China
Services:
• Worldwide Shipping • Technical Support • Spare Parts Supply • Marine Equipment Sourcing
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
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