Kongsberg Norcontrol SSU 8810 Safety System Unit
KONGSBERG
Refurbished
The Kongsberg Norcontrol SSU 8810 Safety System Unit is a dedicated marine main-engine safety controller designed to monitor critical engine conditions and automatically initiate protective actions such as shutdown, slowdown and emergency stop when required.
The original SSU 8810 User’s Manual describes the unit as a Norcontrol Automation safety system used to monitor the ship’s main engine and RPM and to control protective functions when operating conditions exceed predetermined limits.
The SM MARINE SERVICE™ stock unit shown here is clearly identified as:
Manufacturer / System: Kongsberg / Norcontrol
Model: SSU 8810
Product Type: Safety System Unit
Application: Main Engine Safety & Protection System
Serial No. visible on rear unit: 200049
Main Supply Connection: 24VDC input
Installation Type: Panel / console-mounted marine automation unit
The front panel contains dedicated indication for engine shutdown, slowdown, overspeed, emergency stop, RPM detector functions, status/warning information and programmable operating parameters.
The SSU 8810 is a stand-alone main-engine safety system developed for propulsion-engine protection.
According to the original manual, its principal monitoring and control facilities include:
This means the SSU 8810 is not simply an alarm annunciator. It actively forms part of the main-engine protection chain.
The SSU 8810 processes multiple safety inputs from the propulsion engine.
When a configured condition exceeds the required limit, the controller can initiate either:
Automatic Shutdown (SHD)
or
Automatic Slowdown (SLD)
depending on the programmed safety function.
A Kongsberg functional specification for an AutoChief installation describes SSU-8810 as the vessel’s safety system for automatic shutdown and slowdown from main-engine sensors, together with manual emergency-stop functionality.
One of the most important SSU 8810 safety functions is main-engine overspeed protection.
The system receives engine-speed information from dedicated RPM pickup/detector channels and compares actual engine RPM against a configured overspeed level.
When that threshold is exceeded, the safety system can command the required shutdown action.
The SSU 8810 manual specifically identifies OP.CODE 01 as the pre-labelled overspeed shutdown function.
This is why the front panel prominently displays:
OVER SPEED
as the first major safety alarm.
The SSU 8810 also forms part of the vessel’s manual emergency-stop arrangement.
Documented AutoChief installations use emergency-stop pushbuttons at locations such as the bridge, engine control room and emergency engine-control position. When an emergency stop is activated, the safety system commands the corresponding engine stop function.
The photographed panel includes:
EMERGENCY STOP SW.
SHUT DOWN
S/G OVERLOAD
SHUT DOWN CANCELLED
CONTROL AIR LOW PRESS.
together with a separate indication for:
EMERGENCY STOP VALVE ACTIVATED
These labels provide useful evidence when matching an SSU 8810 replacement to a particular main-engine installation.
The photographed SSU 8810 is configured with several engine-specific safety indications.
Examples visible on this particular front panel include:
OVER SPEED
MAIN LUB. OIL INLET LOW PRESS. / HIGH TEMP. FAILURE
THRUST PAD HIGH TEMP.
CAM LUB. OIL INLET LOW PRESS.
L.O. INLET FILTER HIGH DIFF. PRESS.
J.C.F.W. INLET LOW PRESS.
CRANKCASE OIL MIST DENSITY HIGH
AXIAL VIBRATION HIGH
P.C.O. HIGH LEVEL
P.C.O. OUTLET HIGH TEMP. / CAM L.O. INLET HIGH TEMP.
E.G.B. STEAM PRESS. HIGH / E.G.B. EXH. GAS TEMP. HIGH
J.C.F.W. OUTLET LOW PRESS. / HIGH TEMP.
EXH. GAS OUTLET HIGH TEMP. / T/C REVOLUTION HIGH
SCAV. AIR FIRE BOX HIGH TEMP.
T.C. LUB. OIL INLET LOW PRESS.
T/C EXH. OUTLET HIGH TEMP.
The specific sensor assignments vary with vessel and engine configuration, so these labels should be treated as the configuration of this particular panel rather than a universal SSU 8810 alarm list.
The front panel contains a dedicated:
RPM-DETECTOR SYSTEMS
section with:
FAIL 1
FAIL 2
PICK UP NO.1
PICK UP NO.1
PICK UP NO.2
together with RPM-level indicators.
The original SSU documentation identifies RPM detector monitoring as one of the core functions of the safety unit.
The manual also identifies a dedicated RPM Detector Card NA-1120 among the SSU replaceable parts.
The panel also shows:
RPM – LEVELS
with indicators for:
ALARM BLOCK
RPM 1
RPM 2
RPM 3
These levels allow safety functions to be associated with engine-speed ranges and operating conditions.
The SSU parameter documentation includes Alarm Block and RPM Level parameters as part of the configurable safety-system logic.
The original SSU 8810 manual provides the following core electrical and environmental data:
| Specification | SSU 8810 |
|---|---|
| Nominal Supply | 24VDC |
| Permitted Supply Range | 18–32VDC |
| Power Consumption | Approx. 15W + adaptor cards |
| Operating Temperature | 0°C to +70°C |
| Storage Temperature | -30°C to +80°C |
| Configuration | 19-inch rack / optional cabinet |
| Main Application | Marine Main Engine Safety |
| Protective Functions | Shutdown, Slowdown, Overspeed, Emergency Stop |
The rear of the photographed SM MARINE SERVICE™ unit also clearly identifies:
P10 – INPUT 24VDC
which agrees with the original manual specification.
The photographed SSU 8810 rear panel contains several clearly labelled connectors:
P10 – INPUT 24VDC
P11
P13
P15
P16
P17
P18
P19
P20 – INPUT AC
P36
These connector references are valuable when matching an existing SSU 8810 during replacement.
Because SSU systems may have different interface configurations, technicians should compare the complete rear connector arrangement before replacing the unit.
The SSU 8810 includes continuous self-monitoring.
The photographed front panel contains indicators for:
SYSTEM OPERATION
TO SIMULATE
RECEIVE
TRANSMIT
and warning indications for:
INT. POWER FAIL.
COMMUNICATION
MEMORY
INPUT/OUTPUT
FAILSAFE
The original manual confirms that the SSU contains continuous self-check facilities and can generate an error indication when an internal failure is detected.
This diagnostic capability is important because the SSU itself is a critical component of the propulsion safety system.
The SSU 8810 supports an online system test.
The manual describes a procedure using the CHANGE LOCK and TEST button. During the test, program information is displayed and the alarm/status LEDs and display segments are checked without interrupting normal unit operation.
This is useful for routine maintenance and verification of:
LED indicators
Display segments
Panel functionality
Internal test routines
The photographed unit visibly contains both:
CHANGE LOCK
and
TEST
controls.
The front-panel key switch is marked:
CHANGE LOCK
This function prevents accidental or unauthorized changes to operational parameters.
The SSU 8810 allows selected system parameters to be viewed through the:
OP.CODE
PARAMETER
VALUE
displays.
Buttons marked:
DOWN
UP
LOWER
RAISE
ENTER
TEST
are used for parameter access and system testing.
The correct parameter values should always be recorded before any adjustment.
The SSU 8810 can operate as part of a larger propulsion-control system.
The original manual specifically describes integration with Norcontrol AutoChief-4 and AutoChief-7 Remote Control Systems.
Later Kongsberg functional specifications also document SSU-8810 as the safety system used alongside AutoChief 4 / AC4 remote propulsion control.
For that reason, buyers may search for this same equipment as:
AutoChief SSU 8810
AC4 SSU-8810
Norcontrol AutoChief Safety System
Kongsberg Main Engine Safety Unit
These are important SEO and sourcing phrases.
In one documented AutoChief installation, the SSU 8810 was supplied from a 24VDC safety-system power source with battery-backed emergency supply.
The general SSU manual specifies an allowable supply range of 18–32VDC, nominally 24VDC.
The precise shipboard power-distribution arrangement depends on the vessel installation and should be checked against the applicable wiring diagram.
The SSU 8810 User’s Manual identifies several replaceable internal components.
Important documented spare references include:
Processor Card – NN-791.10
Power Supply Unit – VT25-373-99/X9
Motherboard – NA-1117.1
RPM Detector Card – NA-1120
Input Adaptors
Relays
Panel Card
These references are extremely useful for shipowners and engineers who do not require an entire SSU 8810 assembly but only need to repair an existing unit.
For legacy Kongsberg/Norcontrol automation spares, buyers can contact SM MARINE SERVICE™ for sourcing support.
One particularly useful SSU 8810 spare reference is:
VT25-373-99/X9
The SSU 8810 manual specifically identifies this unit as the system power-supply module.
Therefore, searches such as:
SSU 8810 power supply
SSU 8810 PSU
VT25-373-99/X9 Kongsberg
Norcontrol VT25-373-99/X9
may refer to this internal replacement component.
Check the vessel’s 24VDC supply and confirm voltage at the P10 INPUT 24VDC connection.
The SSU manual specifies a valid input range of approximately 18–32VDC.
If input power is correct but the panel remains inactive, inspect the internal PSU and relevant connections.
If INT. POWER FAIL. is illuminated, verify supply voltage and inspect the internal SSU power-supply circuit.
A documented internal replacement PSU is VT25-373-99/X9.
If the COMMUNICATION warning is active, inspect the relevant system communication wiring, connectors and the interface to the associated AutoChief/remote-control system.
Do not replace the complete SSU before checking external communication connections.
A MEMORY warning can indicate an internal processor/memory-related problem.
The system processor card listed in the manual is NN-791.10.
If the INPUT/OUTPUT warning is active, investigate the relevant safety input/output circuits, adaptors, wiring and associated field sensors before assuming the central processor is defective.
Check:
RPM pickups
Pickup wiring
RPM Detector Card
Connector condition
Parameter configuration
The SSU manual identifies the NA-1120 RPM Detector Card as a replaceable component.
The SSU online-test routine can be used to verify LEDs and display segments without stopping the operating system, following the manual procedure.
An SSU 8810 may have vessel-specific:
Alarm legends
Sensor assignments
Parameter settings
Software revision
Connector configuration
Therefore, a replacement should be checked against the original unit and vessel documentation before commissioning.
SM MARINE SERVICE™ supports worldwide sourcing and supply of complete Kongsberg / Norcontrol SSU 8810 Safety System Units and related legacy spare parts.
Depending on current stock, equipment may be available in:
New / New Old Stock
Used Tested Working
Refurbished
Reconditioned
Possible spare requirements include:
Complete SSU 8810 Safety System Unit
NN-791.10 Processor Card
VT25-373-99/X9 Power Supply
NA-1117.1 Motherboard
NA-1120 RPM Detector Card
Panel Card
Input Adaptors
Relays
The above internal components are documented in the SSU 8810 manual.
For accurate matching, customers should provide front and rear photographs, serial number, system/engine details and any available software or configuration information.
Many older vessels continue operating Norcontrol / Kongsberg AutoChief propulsion-control installations.
Replacing an entire remote-control and engine-safety architecture can involve extensive engineering, wiring modifications, commissioning and class approval.
Where the original system remains operational, sourcing a correct SSU 8810 or a replacement internal card can therefore be a practical maintenance solution.
This is particularly important because the SSU performs essential propulsion safety functions, including engine shutdown, slowdown, overspeed protection and emergency stop.
The SSU 8810 is a marine main-engine Safety System Unit developed by Norcontrol and later associated with Kongsberg. It monitors engine safety conditions and controls protective functions including shutdown, slowdown and emergency stop.
In the original documentation, SSU stands for Safety System Unit.
The original manual specifies 18–32VDC, normally 24VDC.
Yes. Engine overspeed is one of its primary safety functions.
Yes. Automatic shutdown is one of the system’s documented protective functions.
Yes. SSU 8810 supports automatic engine slowdown from configured main-engine safety inputs.
Yes. Original documentation describes SSU 8810 integration with AutoChief-4 and AutoChief-7, and later specifications also document it with AutoChief 4 installations.
The manual lists the NN-791.10 Processor Card as a replaceable part.
The manual identifies VT25-373-99/X9 as the internal PSU.
The manual identifies NA-1117.1 as the motherboard.
The SSU 8810 replaceable-parts section identifies the NA-1120 RPM Detector Card.
Not automatically. Vessel-specific alarm assignments, software, parameters, connector configuration and engine-safety logic should be checked before replacement.
SM MARINE SERVICE™ can support worldwide sourcing of complete SSU 8810 systems and related Kongsberg/Norcontrol legacy marine automation spare parts, subject to stock availability.
Kongsberg Norcontrol SSU 8810 Safety System Unit is a dedicated marine main-engine protection controller used for emergency stop, automatic shutdown, slowdown, overspeed and RPM monitoring. The system operates from nominal 24VDC and is documented for use with legacy AutoChief-4 / AutoChief-7 propulsion-control systems. Important internal spares include NN-791.10 Processor Card, VT25-373-99/X9 PSU, NA-1117.1 Motherboard and NA-1120 RPM Detector Card. SM MARINE SERVICE™ supplies complete SSU 8810 units and related legacy Kongsberg/Norcontrol marine automation spare parts worldwide.
SM MARINE SERVICE™
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
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
0
BDT 0
BDT 0
BDT 0
BDT 0
Marine Equipment Supplier