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MC-603-02A 885
MC-603-02A 885
MC-603-02A 885

NABCO MC-603-02A 885 Marine Remote Control Logic PCB Board

  • Model: MC-603-02A (Part Series 885 72739837)
  • Brand: NABCO / Nabtesco
  • Series: MC Marine Control Systems Series
  • Core Function: Output driver and logic command processing board for marine main engine control systems.
  • Product Type: Printed Circuit Board / Logic Control Card
  • Key Specs: 24V DC System Power | Opto-Isolated Logic Inputs | Heavy-Duty Conformal Coating
  • Condition: New Original / New Surplus
  • Inventory Status: Legacy item; recommended for strategic critical buffer stock to avoid vessel operational delays.
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Description

Key Technical Specifications

Parameter Specification
Model Number MC-603-02A
Part Series 885 Series (e.g., 885 72739837 sub-assembly family)
Manufacturer NABCO (Nabtesco Corporation)
Primary Application Marine main engine remote control & propulsion command execution
Circuit Function Output relay driving, interlock logic processing, and signal routing
Supply Voltage 24 V DC (±10%)
Input Signals Opto-isolated digital inputs from bridge and ECR consoles
Output Contacts High-reliability relay outputs and solid-state driver channels
Operating Temperature -10°C to +70°C (14°F to 158°F)
Environmental Protection Conformal coating against moisture, salt fog, and marine vibration
Weight 0.45 kg (0.99 lbs)

 

Product Introduction & Supply Chain Strategy

The NABCO MC-603-02A is an advanced output driver and command processing PCB unit engineered for NABCO marine remote control systems. Positioned within the main control rack, it processes directional commands, safety interlocks, and start/stop signals between the bridge lever, ECR panel, and main engine actuators.

Keeping a genuine New Surplus MC-603-02A card in your critical onboard inventory is an essential supply chain insurance strategy. Main engine control board failures stall vessel maneuvering, risking port detentions and costly off-hire hours. Sourcing unused original inventory guarantees fresh capacitors and zero contact degradation, bypassing long OEM lead times and avoiding the high failure rates associated with second-hand parts.

 

Installation & Configuration Guide

Stage 1: Pre-Installation (Prep & Safety)

  1. Power Isolation: De-energize the main 24V DC power feed to the marine engine control cabinet. Confirm zero voltage with a digital multimeter before touching components.
  2. ESD Protection: Attach a grounded ESD wrist strap before handling the replacement module.
  3. Record Configuration: Photograph and document all onboard DIP switch settings, jumper positions, and connector wiring labels on the existing board.

Stage 2: Removal

  1. Disconnect all edge-connector terminal blocks and wire harness plugs. Do not pull directly on individual lead wires.
  2. Unfasten the retaining screws securing the board to the rack chassis or mounting standoffs.
  3. Carefully slide the PCB straight out to prevent bending or damaging the rear backplane pin array.

Stage 3: Installation (Clone & Seat)

  1. Match and duplicate every DIP switch bank and jumper pin configuration from the old card onto the replacement MC-603-02A.
  2. Align the board with the guide rails and press it firmly into place to seat the backplane connector completely.
  3. Fasten mounting screws to 0.8 N·m to guard against continuous engine room vibration.

Stage 4: Power-On & Testing

  1. Re-apply 24V DC system power. Confirm the main status LED illuminates solid green without fault indications.
  2. Conduct a stationary control sequence test from the ECR desk to verify relay actuation and command handshakes.
  3. Validate interlock safety logic before returning the propulsion control system to active service.
MC-603-02A 885

MC-603-02A 885

MC-603-02A 885

MC-603-02A 885

Firmware/Software Versions & Upgrade Notes

  • Hardware-Driven Architecture: The MC-603-02A operates using discrete logic ICs and factory-flashed EPROMs. Field software downloads or laptop flashing tools are not required.
  • Sub-Revision Compatibility: The “02A” revision incorporates revised output switching circuits compared to earlier “01A” units. While physical dimensions are identical, confirm terminal pinout diagrams before cross-substituting sub-revisions like 02D or 02F.
  • Configuration Warning: Always ensure jumper configurations match the original board exactly. Incorrect jumper placement can alter relay output timing and lead to interlock fault loops during engine starting.

 

Frequently Asked Questions (FAQ)

Is this NABCO MC-603-02A board brand new or refurbished?

This product is a Brand New Surplus unit. It is not used, not pulled from a decommissioned vessel, and not refurbished. All modules undergo quality inspection to ensure OEM-level reliability.

Why buy New Surplus over a refurbished PCB for marine applications?

Refurbished PCB modules often contain aged electrolytic capacitors and microscopic solder fractures caused by continuous vessel vibration. A failure in the main engine logic control during harbor maneuvering can result in severe marine safety risks. New Surplus provides full 10–15 year component longevity and absolute reliability at a fraction of OEM list price.

Does replacing the MC-603-02A require software programming?

No laptop software or programming tools are needed. The module functions purely on hardware logic and onboard DIP switch/jumper settings.

What is the difference between MC-603-01A and MC-603-02A variants?

The 02A variant features updated output driver stage circuitry designed for higher relay switching endurance. Always verify your cabinet schematics when upgrading between revision letters.

What warranty is provided with this New Surplus PCB?

Every NABCO MC-603-02A board supplied from our inventory comes backed by a 1-year functional replacement warranty.

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