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Key Technical Specifications
| Parameter | Value |
|---|---|
| Model | Autronica NK-110 |
| Product type | Preprocessing circuit module |
| Known variant 1 | NK-110A/8-AUX |
| Known variant 2 | NK-110A/8-MP |
| Alternate identifier | NKA-110 |
| Application example | Engine AU3 configuration for NK-110A/8-AUX |
| Application example | Engine MF configuration for NK-110A/8-MP |
| Primary function | Engine alarm and monitoring signal preprocessing |
| System compatibility | Verify the installed Autronica engine alarm system and panel |
| Supply voltage | Not verified from available public listings |
| Input/output count | Not verified from available public listings; do not infer “8” without the OEM schematic |
| Connector pinout | Not verified; confirm against the exact variant and board revision |
| Dimensions and weight | Supplier-specific; one listing reports approximately 2.5 kg for the module listing |
| Operating temperature | Not verified from available public listings |
| Condition | Current listings include used stock |
| Availability | Legacy marine spare; inventory varies by variant |
Current listings identify the Autronica NK-110 as a preprocessing circuit and show at least two variants: NK-110A/8-AUX and NK-110A/8-MP. Supplier information also associates the unit with the NKA-110 designation and reports approximately 2.5 kg for one module listing. The available sources do not provide a complete OEM electrical datasheet, so voltage, pinout, environmental ratings, and exact channel definitions must be verified from the installed system documentation.
Product Introduction
The Autronica NK-110 is a preprocessing circuit module used in marine engine alarm and monitoring systems. Known configurations include NK-110A/8-AUX and NK-110A/8-MP, with listings referencing engine AU3 and engine MF applications.
This is not a generic plug-in alarm card. The suffix, engine configuration, connector wiring, and board revision determine compatibility. Confirm the complete marking and compare the replacement against the vessel’s Autronica schematic before installation.
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to This Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| NK-110 has no indication or system response | Missing supply, blown fuse, loose connector, or failed preprocessing circuit | ✅ Medium | Measure supply voltage at the module terminals using the vessel wiring diagram | Verify power and connector seating before replacing the module |
| Multiple engine alarms appear simultaneously | Common supply, return, preprocessing, or communication fault | ✅ High | Compare affected alarm channels and check common terminals for continuity and voltage | Investigate shared wiring and supply circuits first |
| One engine alarm channel is missing | Open sensor circuit, incorrect terminal, failed input path, or module fault | ✅ High | Simulate the approved alarm input and measure the module response at the assigned terminals | Trace the field circuit, then replace the module if the fault follows the channel |
| False alarms occur after replacement | Wrong suffix, incorrect wiring, or incompatible engine configuration | ✅ High | Compare the old and new labels, terminal positions, jumpers, and board revision | Stop testing and verify whether the application requires /8-AUX or /8-MP |
| AU3 engine signals fail after installation | NK-110A/8-MP installed instead of the AUX variant, or incorrect configuration | ✅ High | Compare the module marking with the original unit and AU3 system schematic | Use the exact AU3-compatible variant documented by Autronica |
| MF engine signals fail after installation | Wrong preprocessing variant or incorrect signal mapping | ✅ High | Verify the engine identification and trace each signal to the documented input terminal | Do not wire by memory; match the original terminal map |
| Alarm delay is incorrect | Timer or downstream logic issue, incorrect configuration, or different module revision | ❌ Medium | Apply a controlled alarm simulation and record pickup and release times | Check system timing components and documentation before replacing the PCB |
| Alarm resets incorrectly | Faulty reset circuit, common wiring, relay contact, or preprocessing logic | ✅ Medium | Operate the approved reset control while monitoring the module input and output states | Check reset wiring and relay contacts before condemning the module |
| Intermittent alarms during vibration | Loose plug, cracked solder joint, corrosion, or mechanical stress | ✅ Medium | Inspect connectors and monitor continuity while following approved vibration checks | Repair the external connection or replace the module after confirming the fault |
| Replacement is not recognized | Board revision mismatch, connector mismatch, or system-level fault | ✅ High | Check connector keying, board markings, system diagnostics, and supply rails | Obtain an exact replacement and request revision photos before purchase |
| Module was handled without ESD protection | Damage to input circuitry or logic components | ✅ Medium | Perform a controlled functional test after inspecting the PCB for handling damage | Use a grounded wrist strap and ESD-safe packaging during removal and installation |
Support note: If the fault remains, contact technical support with photos of the complete nameplate, variant marking, PCB revision, connectors, engine-system schematic, alarm logs, and measured terminal voltages.
- NK-110
- NK-110
Frequently Asked Questions
What is the Autronica NK-110?
The NK-110 is an Autronica preprocessing circuit used in marine engine alarm and monitoring systems. Public listings describe it as a preprocessing circuit rather than a standalone universal PLC or alarm module.
What do NK-110A/8-AUX and NK-110A/8-MP mean?
They are different listed configurations of the NK-110. Available listings associate /8-AUX with an engine AU3 application and /8-MP with an engine MF application. Treat those suffixes as application identifiers until the OEM schematic confirms their exact function.
Can I substitute an NK-110A/8-AUX for an NK-110A/8-MP?
Do not substitute them without written technical confirmation. The variants may use different signal assignments, preprocessing logic, connector wiring, or engine-specific configuration. Match the complete model and suffix shown on the original unit.
Can I hot-swap the NK-110?
Do not assume live replacement is permitted. Isolate the relevant electrical supply and connected alarm circuits before removing the module. Follow the vessel’s lockout/tagout and alarm-system bypass procedures so the replacement does not create an undetected alarm condition.
Will the original alarm configuration remain after replacement?
That depends on the system architecture. Record all jumpers, switches, connector positions, labels, and external configuration settings before removal. After installation, perform a controlled alarm simulation for every affected engine channel.
Is the Autronica NK-110 obsolete?
It should be handled as legacy marine equipment with limited, variant-specific availability. Current listings show used NK-110 stock and multiple configurations rather than a readily accessible current-production datasheet. Confirm stock condition, board revision, test evidence, warranty, and return terms before purchase.
What should a supplier test before shipping?
Request a visual inspection, connector and terminal check, supply-current verification, power-up test in a compatible Autronica system, simulated alarm-input tests, reset tests, and documentation of the exact variant. Test photos and videos should show the label, PCB revision, and functional response.
