NABCO MC-103-01B PCB Card

Description

Product Introduction & Engineering Value

The NABCO MC-103-01B is a legacy marine control PCB used in the M-800B Bridge Maneuvering System. This is not a generic PLC replacement card. Its value is in maintaining an installed NABCO control architecture where the original board may no longer be readily obtainable through normal OEM distribution.

The board is also identified by 885 72739840, giving procurement teams a second search key. Available market records show both used and new/open-box examples, so condition and test status need to be established separately from part-number identity.

Technical Specifications

Identification Cross-Reference

NABCO M-800B → MC-103-01B → 885 72739840

That relationship is particularly useful when searching marine spare-parts databases. The M-800B spare-parts reference explicitly places MC-103-01B among the system’s components and calls it a micro-computer PCB card.

A separate supplier describes the same part as MC-103-01B / 885 72739840, while another listing reports the board weight as approximately 470 g.

Engineering caution: Public sources do not provide a sufficiently reliable OEM datasheet for voltage, processor architecture, I/O count, or communications protocol. Those parameters should not be inferred from the part number.

MC-103-01B

MC-103-01B

MC-103-01B

Field Application & the “Trench” Experience

Picture a vessel with an aging NABCO M-800B Bridge Maneuvering System. During troubleshooting, the propulsion-side mechanical equipment checks out, but the bridge control system develops intermittent command-processing problems.

The maintenance team has an old spare labeled simply “NABCO PCB.”

That is not enough.

The technician checks the installed board and finds MC-103-01B. Procurement then cross-references the board against 885 72739840 and the M-800B system documentation. The replacement candidate is photographed before shipment and compared with the installed PCB.

That extra identification step is cheap insurance. The M-800B documentation lists several different NABCO components, so a generic “NABCO control board” description does not establish interchangeability.

Specific application scenarios

• M-800B bridge maneuvering system maintenance — direct replacement of an identified MC-103-01B micro-computer PCB.
• Ship bridge control cabinet refurbishment — retaining a verified PCB spare during scheduled vessel overhaul.
• Marine propulsion-control troubleshooting — replacing the control PCB after power, wiring, and field-device checks have been completed.

Transparency SOP: QA & Testing

For New Surplus, New Open Box, or Refurbished MC-103-01B stock, use a controlled inspection process.

1. Verify identity

Check the actual board for:

• MC-103-01B
• 885 72739840
• NABCO markings
• Revision or serial markings
• Additional identification such as N12146, where applicable

2. Inspect the PCB

Check the edge connectors, solder joints, traces, IC packages, capacitors, terminals, and mounting hardware. Marine storage adds another concern: look for corrosion or contamination associated with humidity and salt exposure.

3. Compare against the installed card

Connector position and component population should be compared with photographs of the existing board before installation.

4. Perform electrical testing

Where suitable equipment is available, verify continuity, insulation/isolation, power rails, and other applicable electrical parameters.

5. Functional test

The preferred verification is operation in a compatible NABCO M-800B test environment. A board that merely powers up should not automatically be described as functionally tested.

Current market evidence includes used boards as well as new/open-box stock, reinforcing the need to document actual condition rather than relying on the model number alone.

The Veteran’s Tech Trap Guide

⚠️ Trap #1 — Confusing MC-103-01B with other NABCO MC boards

NABCO has multiple MC-series boards. The M-800B spare-parts listing also includes other components and control boards. Do not substitute another MC-series board simply because the physical format appears similar.

⚠️ Trap #2 — Ordering without the 885 number

Use both identifiers: MC-103-01B and 885 72739840. Several current listings use the numerical part number as the primary searchable identifier.

⚠️ Trap #3 — Assuming “New Open Box” means OEM-tested

A current listing identifies its condition as New – Open Box, while other market sources offer used units. That condition category does not by itself prove functional testing in an M-800B system.

PRO TIP: For the spare-parts database, record the component as NABCO MC-103-01B / 885 72739840 / M-800B Micro-Computer PCB. This preserves the component, part-number, and system relationships in one entry.

Dynamic FAQ

What is NABCO MC-103-01B?

It is a micro-computer PCB card used in the NABCO M-800B Bridge Maneuvering System. This system-level association is documented in a marine spare-parts reference.

What is 885 72739840?

885 72739840 is the part number associated with the MC-103-01B PCB. Multiple marine automation listings use these two identifiers together.

Is MC-103-01B a PLC module?

Some marketplace listings categorize it as a PLC processor module, but the more specific marine spare-parts documentation describes it as a micro-computer PCB card in the M-800B Bridge Maneuvering System. For technical documentation, the latter description is preferable unless an OEM manual specifies otherwise.

What should I verify before ordering?

At minimum, verify:

• MC-103-01B
• 885 72739840
• M-800B system compatibility
• Board revision
• Connector arrangement
• Actual PCB photographs
• Condition and test status

Is the board available as New Surplus?

Yes. Current market records show examples described as New, New Open Box, and Used, although availability changes by supplier.

What warranty should I request?

For a critical marine-control PCB, request written warranty terms covering functional failure, the return period, and the actual test procedure used by the supplier. Do not treat New Open Box status as equivalent to a current OEM warranty.

Can MC-103-01B be replaced directly?

It should only be treated as a direct replacement after the installed board and M-800B Bridge Maneuvering System configuration have been positively identified. The available sources establish the system relationship, but they do not provide a complete interchangeability matrix.