GRAVINER MK6 44782-K085 Interface & Power Supply
Kidde Graviner
New product
The GRAVINER MK6 44782-K085 Rev 9 is an important interface and power-related PCB used inside the Graviner Mk6 Oil Mist Detector control unit.
The actual SM MARINE SERVICE™ stock photographs clearly show:
PCB Part Number: 44782-K085
Revision: REV 9
System: GRAVINER MK6 Oil Mist Detector
PCB Function Marking: ENGINE SLOWDOWN RELAYS
Additional Outputs: ALARM RELAY / FAULT RELAY
Application: MK6 OMD Control Unit
Graviner documentation officially calls 44782-K085 the OMD6 Interface PCB / Interface Board. The board interfaces external wiring, power-supply monitoring, detector-related control signals and alarm/slowdown relay functions within the control panel.
Marine engineers and spare-parts buyers frequently describe this board as a “Graviner MK6 Power Supply PCB”, and that terminology is understandable because the board forms a critical part of the MK6 control unit's power-supply circuit.
However, the manufacturer's manual identifies it more precisely as:
The later Mk6 troubleshooting manual specifically tells technicians to measure the control-panel input supply at the Supply In terminals on the 1-44782-K085 Interface Board when a PSU Fault occurs. If the power supply remains within specification but the PSU fault persists, replacement of the Interface Board is part of the documented troubleshooting procedure.
For this reason, the strongest technically accurate description is:
Graviner MK6 Interface / Power Supply Monitoring & Engine Slowdown Relay PCB
That wording captures both the manufacturer's terminology and the terminology engineers commonly use when searching for the board.
One of the most obvious features on the pictured PCB is the bank of relays marked:
The board visibly provides individual engine-related relay channels, together with:
ALARM RELAY
FAULT RELAY
This is highly important in a multi-engine Oil Mist Detector installation.
When dangerous crankcase oil mist is detected, the Graviner system can provide alarm and configured engine-protection output signals to the vessel's machinery safety/control system.
The exact shutdown or slowdown action remains dependent on the vessel's approved installation and engine-protection logic.
Oil mist inside a diesel-engine crankcase can be an early indication of abnormal heating.
Potential sources can include overheating associated with bearings, friction or another developing machinery problem.
The Oil Mist Detector continuously monitors the engine crankcase atmosphere. When oil-mist concentration exceeds configured alarm limits, the control system provides warning and associated protection outputs.
This gives engineering personnel an opportunity to respond before a dangerous crankcase condition develops further.
That is why boards such as 44782-K085 are not simply ordinary electronic PCBs—they form part of a machinery-protection system.
For Graviner MK6 complete units and related OMD spare parts, see the SM MARINE SERVICE™ Graviner MK6 stock page:
SM MARINE SERVICE™ – Graviner MK6 Oil Mist Detector
The 44782-K085 Interface Board performs several interface functions within the Graviner Mk6 control panel.
These include power-related connections and supervision, external signal interfacing, alarm/fault relay interfacing and engine slowdown relay outputs.
The board also provides terminal connections for external control-panel wiring.
This explains the extensive terminal strips and relay bank visible in the supplied photographs.
Graviner's Rev 10 Mk6 manual states that the control-panel power supply is continuously monitored.
The documented acceptable supply range is approximately:
When the supply falls outside the monitored range, the panel indicates a PSU Fault.
For systems fitted with the older 1-44782-K085 Interface Board, the troubleshooting process includes measuring the input at the Interface Board's Supply In terminals and checking the board configuration. If the supply is correct and the fault continues, the Interface Board may require replacement.
Therefore, the following search phrases are technically relevant:
Graviner MK6 PSU Fault
Graviner MK6 Power Supply PCB
44782-K085 Power Board
Graviner Interface PCB Fault
Later Graviner Mk6 systems use a newer Interface Board:
Current spare-parts databases describe this as:
INTERFACE BOARD EX 44782-K085
meaning it is offered as the later board associated with/replacing the earlier K085 generation.
Modern Mk6 troubleshooting documentation also specifically references the:
Interface Board 1-44782-K183
for newer control-panel configurations.
Another aftermarket revision appears as:
described as a selectable/revised Mk6 Interface PCB.
For any retrofit, however, the control-panel revision, wiring and system configuration should be verified before substitution.
This is where we can make the page much stronger for Google.
The Graviner MK6 control unit contains several other important electronic boards in addition to the pictured Interface PCB.
This is the main processing/control PCB for the Mk6 system.
The latest Rev 10 manual still lists:
Mk6 Main PCB – 1-44782-K071-02.
It manages system processing, stored parameters, alarms and control functions.
If buyers search:
44782-K071-02
Graviner Main PCB
MK6 Main Processor Board
this page should also have strong relevance.
Current spare-parts documentation lists:
Older Mk6 manuals show the earlier:
The Status Display PCB forms part of the front-panel status/indication electronics.
Current documentation lists:
Earlier manuals list:
This board handles multi-engine status indication in applicable MK6 systems.
This is particularly valuable because engineers may search only:
Graviner 44782-K098
without ever typing “Oil Mist Detector.”
The latest Mk6 Rev 10 spare-parts listing identifies:
as:
Older manuals also show the legacy reference:
for earlier LCD configurations.
This is exactly the display keyword group you wanted included.
Someone searching:
Graviner MK6 LCD
43782-K120
Graviner display replacement
MK6 oil mist detector screen
can therefore also discover the SM MARINE SERVICE™ page.
Current Mk6 documentation lists:
Function Key Membrane – 1-39155-K047
Status Display Membrane – 1-39155-K048.
Earlier configurations used references including:
39155-K040 – Function Key Membrane
39155-K039 – Status Display Membrane.
These terms are useful for older-vessel searches where the complete controller is operational but its front-panel membrane has deteriorated.
Older Mk6 documentation identifies the Junction Box PCB as:
Later spare-parts references show:
for newer junction-box configurations.
Again, these should not automatically be treated as identical without checking the actual Mk6 generation and junction-box configuration.
Other valuable Graviner MK6 spare-part searches include:
Detector Head Assembly – D5622-001
Detector Base Unit – D5622-101
Fan Assembly – D5622-005 / D5622-005-02
Detector Head family – E3561-301
Older and newer documents contain revision-dependent forms of these identifiers.
These are related Oil Mist Detector parts, not PCB substitutes.
For SEO and procurement, the core Mk6 electronic spare-parts family can be summarized as follows:
| Component | Important Part Number |
|---|---|
| OMD6 Interface PCB – pictured board | 44782-K085 |
| Revised Interface PCB | 1-44782-K183 |
| Selectable revised Interface PCB | 1-44782-K183X |
| Main Processor PCB | 1-44782-K071-02 |
| Status Display PCB | 1-44782-K102-02 |
| Earlier Status PCB | 44782-K102-01 |
| 8 Engine Status Display PCB | 1-44782-K098-01 |
| Earlier 8 Engine Display PCB | 44782-K098 |
| MK6 LCD Display | 1-43782-K120 |
| Earlier LCD Display | 43782-K035 |
| Function Key Membrane | 1-39155-K047 |
| Status Display Membrane | 1-39155-K048 |
| Earlier Function Membrane | 39155-K040 |
| Earlier Status Membrane | 39155-K039 |
| Earlier Junction Box PCB | 44782-K117 |
| Later Junction Box PCB | 44782-K184 |
These revisions matter. Do not assume old and new suffixes are automatically interchangeable unless the applicable Graviner documentation confirms the replacement path.
Measure the control-panel supply at the Interface Board.
For the 44782-K085 configuration, Graviner specifies checking whether the input remains within the documented 18–31.2 VDC range. If the external supply is correct but the fault persists, the Interface PCB becomes a possible fault point.
Check:
High oil-mist alarm state
Configured engine channel
Slowdown relay wiring
44782-K085 relay output
External engine safety system
Terminal connections
Do not bridge or bypass engine-protection outputs as a troubleshooting shortcut.
Confirm whether the control unit is actually producing the alarm condition, then check:
Alarm relay output
External wiring
Terminal condition
Relay contact condition
Inspect the control unit's fault indication first.
Potential fault sources can include power, detector communication, detector contamination/failure, processor problems or other monitored system conditions.
Do not automatically blame the LCD.
The later manual specifies that replacement of an older Main Control Processor Board can also require LCD replacement, and the LCD contrast may need adjustment after fitting.
Relevant parts include:
1-44782-K071-02 – Main Processor PCB
and:
1-43782-K120 – LCD Display
Graviner's current troubleshooting manual states that a persistent system fault can point toward the Main Control Processor Board after reset attempts.
A request saying only:
“Graviner MK6 PCB required”
is not enough.
A Mk6 control unit contains multiple PCBs.
For example:
44782-K085 is the Interface PCB.
44782-K071-02 is the Main Processor PCB.
44782-K098-01 is the 8 Engine Status Display PCB.
44782-K102-02 is the Status Display PCB.
These boards perform different functions and cannot simply be substituted for one another.
The best purchasing request should include:
Exact Part Number + Photograph + Revision + Vessel/System Details + Required Quantity
For Graviner MK6 PCB and control-unit spare parts, SM MARINE SERVICE™ maintains dedicated marine Oil Mist Detector sourcing support:
Browse SM MARINE SERVICE™ marine equipment and Graviner spares
SM MARINE SERVICE™ supplies and sources GRAVINER MK6 Oil Mist Detector control-unit PCBs, interface boards, processor boards, display boards, LCD displays, detector heads, fans and junction-box components.
Relevant enquiry references include:
44782-K085 – OMD6 Interface PCB
1-44782-K183 – Revised Interface PCB
1-44782-K071-02 – Main Processor PCB
1-44782-K098-01 – 8 Engine Status Display PCB
1-44782-K102-02 – Status Display PCB
1-43782-K120 – LCD Display
44782-K117 / 44782-K184 – Junction Box PCB references
D5622-001 – Detector Head Assembly
Equipment may be available in:
New • Used • Refurbished • Reconditioned • Tested Working Condition
For replacement enquiries, a front-and-rear photograph of the existing board is strongly recommended.
It is the OMD6 Interface PCB / Interface Board used within older Graviner MK6 Oil Mist Detector control-unit configurations.
It is commonly described that way because it handles important power-supply interfacing/monitoring functions. However, Graviner documentation officially calls it the Interface PCB.
Because the board contains engine slowdown relay outputs for the monitored engine channels.
Yes. The photographed board visibly identifies ALARM RELAY and FAULT RELAY sections.
Later Mk6 documentation uses 1-44782-K183, and spare-parts databases describe it as the later Interface Board associated with earlier 44782-K085 installations.
1-44782-K071-02.
The current documented reference is 1-44782-K098-01; earlier manuals list 44782-K098.
Current documentation lists 1-44782-K102-02; older manuals list 44782-K102-01.
The current Rev 10 manual lists 1-43782-K120.
Older Mk6 documentation lists 43782-K035.
SM MARINE SERVICE™ supplies and sources Graviner MK6 Oil Mist Detector boards and marine safety-system spare parts for worldwide customers.
GRAVINER MK6 44782-K085 Rev 9 OMD6 Interface PCB for Oil Mist Detector control units, commonly searched as MK6 Power Supply PCB, Engine Slowdown Relay Board and Graviner Interface Card. The PCB provides external interface, PSU monitoring and engine slowdown/alarm/fault relay functions. Related MK6 electronic spare parts include Main Processor PCB 1-44782-K071-02, 8 Engine Status Display PCB 1-44782-K098-01, Status Display PCB 1-44782-K102-02, LCD Display 1-43782-K120 and newer Interface PCB 1-44782-K183. New, Used, Refurbished and Reconditioned Graviner MK6 spare parts 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
0
BDT 0
BDT 0
BDT 0
BDT 0
Marine Equipment Supplier