🔹 Product Introduction

The NMF SRK 03 IS91.10.3 is a marine automation PCB/control card associated with the SRK display/control system. Available product references identify it as an NMF SRK 03 PCB card, with part references including IS91.10.3 and 1810 PR011. It is also described in the marine equipment market as an SRK display/control circuit board and as a deck-crane control/interface card.

The board is intended for integration into compatible marine automation equipment. Because the available documentation is limited, the exact electrical interface, supply voltage, I/O configuration, and system compatibility should be verified from the equipment’s original drawings and the identification labels on the existing board before installation.

The supplied listing identifies the item as new, while other market references show the same model in used or new-old-stock condition. Therefore, the actual condition should be stated according to the physical unit being sold.

📋 Product Datasheet

⚠️ Exact dimensions, operating voltage, current consumption, connector pinout, and communication specifications are not sufficiently documented in the available public references. They should not be guessed for a technical datasheet. One market reference reports a weight of approximately 340 g, while another lists approximately 360 g.

🛠️ Operating Procedure & How to Use

🔹 1. Confirm the existing equipment

Before replacement, identify the vessel equipment, control cabinet, SRK system, existing PCB number, connector arrangement, and revision information.

🔹 2. Compare the replacement board

Compare IS91.10.3, SRK 03, PCB layout, connectors, mounting points, jumpers, switches, and board markings with the original card.

🔹 3. Isolate the equipment

Switch the associated control system into a safe maintenance condition. Disconnect electrical power according to the vessel’s approved maintenance procedure.

🔹 4. Remove the old card

Record connector positions and cable orientation before removing the existing PCB. Use ESD protection when handling the board.

🔹 5. Install the SRK 03

Install the card into the correct slot or mounting position. Make sure every connector is fully seated and that no cable is under mechanical stress.

🔹 6. Inspect before energizing

Check for reversed connectors, loose terminals, damaged pins, foreign objects, and incorrect jumper or switch settings.

🔹 7. Power and test

Restore power according to the equipment manufacturer’s sequence. Check display/control functions, system indications, communication status, and associated crane-control functions.

🔹 8. Functional verification

Perform the required operational test under controlled conditions before returning the equipment to normal service.

⚡ Power-On Sequence

1. Confirm the equipment is in a safe maintenance state.
2. Check that the SRK 03 PCB is correctly installed.
3. Verify all connectors and wiring.
4. Confirm the equipment’s specified supply voltage using the original system documentation.
5. Energize the main control system.
6. Allow the controller/display system to complete its startup.
7. Check for fault or alarm indications.
8. Verify communication and control functions.
9. Perform a controlled functional test.
10. Return the equipment to service only after all checks are satisfactory.

🔌 Power-Off Sequence

1. Stop the controlled equipment and place it in a safe condition.
2. Disable automatic or remote control if applicable.
3. Follow the vessel’s approved shutdown procedure.
4. Isolate the relevant electrical supply.
5. Verify that the PCB is de-energized before removing connectors.
6. Use ESD precautions when handling the card.
7. Do not remove or insert the PCB while energized unless the original equipment documentation specifically permits hot swapping.

📖 Product Usage Notes

The SRK 03 should be treated as a system-specific marine control PCB rather than a general-purpose PLC module.

Correct replacement depends on more than the model number. The board revision, connector configuration, firmware or programming, associated SRK display/control equipment, and crane-control system must also be considered.

Public product references associate the SRK 03 / IS91.10.3 with SRK display/control applications and marine deck-crane equipment.

For a replacement project, photograph the original board before removal and record all connector positions. This is especially useful when replacing an obsolete marine automation PCB where the original technical documentation is difficult to obtain.

🔍 Inspection Before Installation

• Check PCB surface for corrosion, cracks, burned components, or damaged tracks.

• Verify all connectors are clean and mechanically secure.

• Compare the part number and revision with the removed card.

• Check for missing components or signs of previous repair.

• Verify the board is free from moisture and contamination.

• Confirm that the equipment’s supply voltage matches the original system specification.

• If the unit is sold as New Old Stock, inspect storage condition before energizing.

❓ Common Questions & Answers

Q: What is the NMF SRK 03 IS91.10.3?

A: It is an NMF SRK 03 control/display PCB used in marine automation equipment. Public listings associate it with SRK display/control and deck-crane applications.

Q: Is SRK 03 a PLC CPU?

A: It should not be described as a conventional PLC CPU. It is identified as a control/display PCB or control card for a specific marine automation system.

Q: What does IS91.10.3 mean?

A: IS91.10.3 is the primary part/reference number associated with the SRK 03 board in available product listings.

Q: Is it used for deck cranes?

A: Several marine-equipment references describe the SRK 03 IS91.10.3 as a deck-crane PCB, control panel module, or interface/display card.

Q: What is the weight?

A: Available references give approximately 340–360 g, depending on the particular listing and configuration.

Q: What is the operating voltage?

A: A reliable public specification for the exact SRK 03 IS91.10.3 supply voltage was not found. The voltage should therefore be confirmed from the original equipment documentation or PCB markings before power is applied.

Q: Can I install it directly into any NMF system?

A: No. The exact equipment compatibility must be confirmed. Matching the SRK 03 and IS91.10.3 numbers alone may not establish complete system compatibility.

Q: Is the product new?

A: The supplied listing describes the item as new. Other market listings show the same model as used or new-old-stock, so the condition should be verified for the specific unit being offered.

Q: What should I check before purchasing?

A: Confirm SRK 03, IS91.10.3, PCB revision, connector layout, equipment application, physical dimensions, and the condition of the actual board.

🔟 Recommended NMF-Related / Marine Automation Spare Parts

Because NMF-specific model information is limited in public documentation, it is safer to recommend related NMF marine automation spare-part references rather than inventing ten unsupported NMF model numbers.

1. NMF SRK 03 IS91.10.3 — SRK control/display PCB
2. NMF SRK 03 1810 PR011 — Related SRK PCB reference
3. NMF SRK Display / SRK-Anzeige — SRK display/control assembly
4. NMF SRK 03 IS91.09.4 — Related SRK reference appearing with the SRK 03 family
5. NMF LBK 02 — NMF PCB/control card reference
6. NMF 1810 PR015 — Related marine PCB/interface reference
7. NMF 932-053 — Related PCB reference appearing with SRK 03 documentation
8. NMF 100-932-053 — Related interface/control reference
9. NMF 106347 — Related SRK PCB reference
10. NMF SRK 03 Interface Card — SRK marine control/interface variant

Several of these references appear together in marine automation spare-part listings, but they should be treated as related references, not automatically interchangeable replacements.