Niigata Mechatronics NK-151 PCB Card (V63101370)

Niigata Mechatronics NK-151 PCB Card (Part No. V63101370 Rev. 1)

The Niigata Mechatronics NK-151 PCB Card (Manufacturer Part Number: V63101370 Rev. 1) is a rack-mounted electronic controller card engineered for marine propulsion remote control systems. Specifically developed as the core processing and feedback loop unit for the TKK-5 Controllable Pitch Propeller (CPP) Control System (Firmware/EPROM: 6PC-V1.02), the NK-151 governs hydraulic pitch positioning, bridge-to-engine room command tracking, feedback error monitoring, and pitch feedback transducer conditioning.

Manufactured in Japan by Niigata Mechatronics Co., Ltd., this industrial marine PCB card is built to endure harsh engine-room operating environments subject to continuous thermal cycling, low-frequency hull vibrations, and electromagnetic noise. It interfaces directly with hydraulic pitch-setting proportional or solenoid valves, feedback potentiometers/differential transformers (LVDTs), and bridge maneuvering consoles.

Model Details

• Manufacturer: Niigata Mechatronics Co., Ltd. (Japan)
• Model: NK-151
• Revision: Rev. 1
• Manufacturer Part Number (MPN): V63101370
• Associated System Module: TKK-5 CPP Controller System
• Software/ROM Version: 6PC-V1.02
• Weight: Approx. 0.70 kg (700 g)

Features

1. Closed-Loop Hydraulic Pitch Control: Integrates high-speed analog differential amplifiers and digital logic to continuously match measured propeller blade pitch against bridge/ECR lever commands with zero overshoot.
2. Dual Isolated Marine I/O Architecture: Complete galvanic isolation between 24 V DC internal logic and field-wiring loops prevents common-mode ground spikes and electrical interference from generator line dips.
3. Factory-Calibrated Feedback Trimmer Network: On-board precision multi-turn potentiometers permit field trimming of Zero Pitch, Ahead Maximum, and Astern Maximum stop limits.
4. Fail-Safe Pitch Lock & Alarm Logic: Built-in supervisory circuits detect open-loop conditions, reference signal loss, or hydraulic tracking delay, generating local trip and alarm outputs to prevent propulsion drive overload.
5. Conformal Coated Marine Assembly: Industrial FR-4 multi-layer substrate protected with a high-grade moisture- and salt-spray-resistant conformal coating to prevent bridge leakage and dendrite growth.

Compatible Equipment Models

• Niigata Marine Propulsion Systems: 6L28HX, 6MG25HX, 8L28HX, 6M26AG, 6M34AG, and 6L26HLX medium-speed diesel engines.
• Propulsion Drives: Niigata Controllable Pitch Propeller Systems (TKK-5, TKK-4 series), Niigata Z-Peller propulsion systems (select maneuvering cabinets).
• Control Panels: Niigata Mechatronics ECR Remote Control Cabinets, Wheelhouse Navigation Propulsion Units, and Emergency Pitch Local Servo Boxes.

Part Number Cross-References

• Primary Part Number (MPN): V63101370
• Model Series: NK-151 / NK-151 Rev. 1
• System Controller Model: TKK-5 CPP Controller
• Associated Rack Partner Modules: NK-150 Input/Output Card (V63101380), NK-152 Feedback Card
• EPROM Program Identifier: 6PC-V1.02

Applications

• Marine main engine controllable pitch propeller (CPP) blade positioning and servo-control.
• Closed-loop pitch command matching across multi-station navigation bridges (Bridge, Port Wing, Starboard Wing, and ECR).
• Hydraulic pitch feedback loop error computation and differential servo actuation.
• Retrofit, routine survey overhaul, and emergency replacement of legacy Niigata Mechatronics automation racks.
• Ocean-going tugs, offshore supply vessels (OSVs), coastal cargo vessels, chemical tankers, and fishing trawlers equipped with Niigata propulsion machinery.

Frequently Asked Questions

What is the primary function of the Niigata Mechatronics NK-151 PCB card?

The NK-151 is an electronic controller card used within Niigata propulsion remote control consoles. It serves as the primary processing module for the TKK-5 CPP system, converting helm speed/pitch commands into balanced control signals for hydraulic pitch-actuating valves while monitoring feedback from the shaft transducer.

Can an NK-151 Rev. 1 card directly replace a standard NK-151 board?

Yes, Rev. 1 is backward-compatible with the original release. However, before commissioning, you must ensure that all hardware jumpers, DIP switches, and EPROM versions (typically 6PC-V1.02) match the configuration of your original vessel rack.

What are the common symptoms of a failed NK-151 card onboard?

Frequent failure indicators include continuous pitch hunting (unstable RPM/pitch relationship), inability to reach zero thrust upon command, “Pitch Discrepancy” or “Servo Failure” alarms on the wheelhouse console, and dead outputs to the pitch control proportional valves.

Do I need to perform electronic calibration after installing this card?

Yes. Because every mechanical feedback linkage, LVDT, and feedback potentiometer possesses slight mechanical tolerance variances, you must perform Zero Pitch, Ahead Limit, and Astern Limit trimmer calibration using the onboard potentiometers prior to sea trials.

How quickly can the replacement card be dispatched to an emergency port call?

Units in stock are packed in ESD-safe shielding and typically dispatched within 24 hours. International air express shipping can deliver to major ports across Asia, Europe, the Middle East, and the Americas within 2 to 4 business days.