Description
The MAN B&W 2101544-1 OB Module is an Operation Box module designed for MAN B&W marine diesel engine control systems. It provides the operator interface functions required for local engine operation, including engine start/stop commands, mode selection, alarm indication, reset functions, and operational status display.
The OB Module is typically integrated with MAN B&W engine automation systems and communicates with the engine control base module. It allows crew members to interact with the engine control system through dedicated buttons, indicators, and display functions during normal operation and maintenance procedures.
The 2101544-1 module is commonly used as a replacement spare part for MAN B&W marine engines, including L-series engine control applications. It is supplied for maintaining existing vessel automation systems where original hardware compatibility is required.

2101544-1
📋 Product Datasheet
| Parameter | Specification |
|---|---|
| Brand | MAN B&W |
| Model | 2101544-1 |
| Series | MAN B&W Engine Control System Series |
| Product Name | OB Module / Operation Box Module |
| Module Type | Marine Engine Operator Interface Module |
| Application | Marine Diesel Engine Control, Engine Monitoring, Local Operation |
| Product Status | New Open Box / Surplus Stock |
| Compatible Engine | MAN B&W L27/38 Series and Related Engine Control Systems |
| Dimensions | Approx. 200 × 150 × 60 mm |
| Weight | Approx. 1.0 kg |
| Origin / Place of Origin | Denmark |
| Power Supply | 24V DC |
| Communication Interface | Engine Control System Internal Communication Link |
| Control Functions | Start, Stop, Local/Remote Mode, Reset, Lamp Test, Display Navigation |
| Display Function | Engine Status and Operation Information Display |
| Installation Type | Panel Mounted Operator Interface |
| Operating Environment | Marine Engine Room Environment |
| Discontinued Status | Legacy Product / Spare Parts Available |
❓ Common Questions & Answers
Q: What is the main function of MAN B&W 2101544-1 OB Module?
A: The OB Module provides local operator control functions for MAN B&W engine automation systems, allowing users to start, stop, monitor, and manage engine operating modes.
Q: What does OB stand for in this module?
A: OB refers to Operation Box, which is the operator interface unit used for local engine control and status display.
Q: Which engines use the 2101544-1 OB Module?
A: It is mainly associated with MAN B&W marine engine control systems, including L-series applications such as L27/38 engines.
Q: Can the OB Module operate independently?
A: No. The OB Module works together with the engine control base module and related automation components to provide complete engine control functions.
Q: What should be checked before replacement?
A: Confirm part number, engine model, communication connection, power supply voltage, software compatibility, and existing control system configuration.
Q: What are common causes of OB Module failure?
A: Common issues include communication loss with the base module, unstable 24V DC supply, damaged keys or display components, wiring problems, and internal electronic faults.
Q: Is MAN B&W 2101544-1 discontinued?
A: The module is considered a legacy marine automation spare part and is mainly maintained through existing inventory and replacement channels.
⭐ Recommended MAN B&W Models
- MAN B&W 2101544-1 OB Module – Operation Box Module
- MAN B&W Base Module – Engine Control Base Unit
- MAN B&W 1698285-9 Base Module 1 MKII – Engine Control Module
- MAN B&W L27/38 Engine Control Module – Diesel Engine Automation Unit
- MAN B&W L21/31 Engine Control System Module – Marine Control Unit
- MAN B&W ME Engine Control Unit – Electronic Engine Controller
- MAN B&W Alpha Control System Module – Propulsion Control Component
- MAN B&W ECS Engine Control System – Marine Automation Platform
- MAN B&W EICU Electronic Interface Control Unit – Engine Interface Module
- MAN B&W Governor Control Module – Engine Speed Control Unit
- MAN B&W Alarm Monitoring Module – Engine Safety Monitoring Unit
- MAN B&W Remote Operation Panel – Engine Remote Control Interface
- MAN B&W CAN Communication Module – Engine Network Interface
- MAN B&W I/O Interface Module – Signal Processing Module
- MAN B&W Marine Automation Controller – Vessel Engine Control Platform
