MAN B&W BM1-MK.II | Bearing Surveillance Module | Marine Engine Maintenance

Description

MAN B&W BM1-MK.II 1698285-9

Key Technical Specifications

Public technical records consistently associate 1698285-9 with BM1-MK.II and 14.0580.0-000. One documented unit is identified as Rev. 1.1 with Code Load Ver. 3.8, while other physical units are identified as Rev. 1.3 and Rev. 1.4. This variation is significant: the BM1-MK.II should not be treated as a generic PLC base module where revision differences can be ignored.

BM1-MK.II

Product Introduction

The MAN B&W BM1-MK.II 1698285-9 is a dedicated marine engine control-system module used in MAN B&W Holeby Diesel equipment. Available records identify it as Base Module 1-MK II, with 14.0580.0-000 as an associated item reference and L27/38 as the relevant engine platform. Some field listings identify the same module as a bearing-surveillance module, indicating that its role is tied to the engine’s monitoring and control architecture rather than general-purpose industrial automation.

This is an important distinction for maintenance engineers. The BM1-MK.II is not adequately specified by its short name alone. Units carrying the same 1698285-9 number have been documented with different revisions and code loads. A replacement therefore needs to be matched against the installed module’s revision, software/code load, engine version, and surrounding control hardware.

Engineering Pain Point

The main field risk is revision mismatch disguised as a part-number match. Records for 1698285-9 show Rev. 1.1, Rev. 1.3, and Rev. 1.4 units. One documented Rev. 1.1 unit carries Code Load Ver. 3.8, while other .II units are associated with later hardware revisions. Without confirming the installed revision and software configuration, a physically matching replacement may not reproduce the expected engine-control behavior.

Typical Applications

• MAN B&W L27/38 engine systems — Used as part of the engine’s dedicated control and monitoring equipment.
• Bearing surveillance — Public maintenance records associate .II with bearing-surveillance functions on L27/38 installations.
• Marine engine automation maintenance — Replacement of failed or aging control-system hardware on vessels using the applicable MAN B&W architecture.
• Engine control system refurbishment — Used when maintaining legacy Holeby Diesel electronic control equipment where the original architecture must be retained.

Technical Pitfalls to Avoid

1. Match the revision, not just 1698285-9. Rev. 1.1, 1.3, and 1.4 examples are documented. Record the exact revision printed on the replacement candidate.
2. Check the code load. A documented 1698285-9 Rev. 1.1 unit carries Code Load Ver. 3.8. Software/code-load compatibility should be confirmed against the vessel’s engine configuration before installation.
3. Do not assume every 1698285-9 has the same application role. Some records call it a Base Module 1-MK II, while others identify it as a bearing-surveillance module. Use the installed cabinet drawings and module labeling to establish its exact role.
4. Verify the engine model. L27/38 is repeatedly associated with this module, but a marine control component should not be transferred between engine variants without checking the complete control-system documentation.
5. Preserve configuration information before replacement. Record module revision, code load, terminal wiring, connected sensors, and any configuration identifiers before removing the original module.
6. Do not publish generic PLC specifications for this module. Public sources do not provide sufficiently reliable voltage, I/O, communication, or environmental specifications for the exact .II configuration. Those values should be taken from the MAN documentation for the installed engine version rather than inferred from unrelated automation modules.

Related Products

• MAN B&W 3157167-5 / 3157167-5.1 MCU — Master Control Unit used in the same broader MAN B&W engine-control ecosystem; its role differs from .II.
• MAN B&W 3157168-7 SBU — Switch Board Unit associated with the engine control architecture; it is not a substitute for .II.
• MAN B&W 1211636-9 BCU — Backup Control Unit associated with MAN B&W engine systems; different control function and configuration.
• MAN B&W 3171197-4 — Engine-control indication/HMI panel associated with the same family of marine automation equipment.
• MAN B&W 14.0580.0-000 — Alternative item/document identification associated with .II / 1698285-9.
• MAN B&W 1689063-2 — Supervision module used in MAN engine-control applications; verify system version before considering it related for replacement purposes.
• MAN B&W 1881610-7 — Master Control Unit associated with later MAN engine-control configurations; not a direct replacement for .II.

Procurement Note

For procurement, identify the component as:

MAN B&W .II — MBD No. 1698285-9 — Item 14.0580.0-000

Then record the hardware revision, code load, engine model/version, PCB identification, and complete label information from the installed unit. Public records show meaningful revision differences, so 1698285-9 alone should not be treated as sufficient interchangeability evidence.

If this is for an operating vessel, the original module’s label photograph and the engine/control-system version should be treated as part of the procurement specification. That is the practical way to avoid installing a superficially matching .II with the wrong revision or software configuration.