STELLAR MARINE 901B Engine Management System

The STELLAR MARINE 901B Engine Management System looks like a specialized marine automation item. It is probably part of the old Lyngsø Marine (now STX-Lyngsø) Stella series systems that regulate and monitor engines. These systems use modular units that are connected by replicated high-speed networks to ensure that parameters can be read and machinery can be controlled reliably across vessels. We couldn’t find a precise match for “901B,” but it is compatible with Stella Gamma micro CPU modules and other engine management devices used in propulsion and safety systems.

Technical Details

• Processor: Gamma Micro Unit (strong, adaptable, and has I/O modules that can be changed).
• Network: Duplicated high-speed for backup and access across the whole ship.
• Controls: Works with two-stroke engines (like MAN B&W), fixed pitch propellers, and has an RPM feedback display (±120 RPM), a fuel index (0–100%), and load limitations (0–110%).
• Safety: DPS-like protection against shutdowns, slowdowns, and overspeed; interlocks for rotating gear and air valves.

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Core Features

• Advanced alarm monitoring with unmanned machinery space (UMS) support for duty engineer warnings and interaction with the bridge.
• Control of the main engine’s start and stop, management of the RPM setpoint (±120 RPM feedback), and emergency shutdown functions.
• Fuel cam and load control with limits of 0 to 110%, as well as interlocks for shifting gear, starting air valves, and protecting against overspeed.
• Duplicated high-speed networks for reading ship-wide parameters and having backup machinery control.

Usage of product

Commercial ships that require propulsion regulation from both the bridge and the engine control room, such as diesel maneuvering systems (DMS 2100), benefit greatly from its use. More than 6,800 installations worldwide, including UMS alarms, generator control, and shaft generators, utilize this system. Works well in heavy seas thanks to automatic mode selection.
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Advantages for Marine Operations

Improves dependability by processing data in different places adjacent to monitored operations. This cuts down on wiring and makes it easier to scale up without spending a lot of money. Provides precise speed/load management for efficiency and duty selection for autonomous operations, which reduces the need for personnel intervention. The tough design is perfect for difficult sea settings, and Lyngsø sea has been in business since the 1950s.