For more details visit www.marinemegastore.com or call 0871 8732404
AUTOMATION SYSTEM The Wärtsilä 20 engine is equipped with the Wärtsilä unified controls (UNIC) engine automation system. The different systems available for Wärtsilä 20 engine are UNIC C1 and C2, described as follows. UNIC system components ESM
Engine Safety Module
MCM
Main Control Module
TCM
Thermocouple Module
IOM
Input Output Module
PDM
Power Distribution Module
LCP
Local Control Panel
LDU
Local Display Unit
UNIC C1 In the UNIC C1 engine automation system, the fundamental aspects of the engine control and safety are handled by the embedded control and management system. This includes engine speed and load control as well as overspeed protection, lube oil pressure and cooling water temperature protection. For the other parts, the design requires the majority of the sensors to be hardwired to a plant or ship control and monitoring system. The UNIC C1 system provides the following functionality: • Fundamental safety (overspeed, LO pressure, cooling water temp.) • Basic local monitoring • Hardwired interface to plant or ship control system. • Speed and load control (electronic speed control by MCM if engine equipped with actuator, otherwise by mechanical governor) • Start/stop management
UNIC C2 The UNIC C2 engine automation system provides a complete embedded engine control and monitoring system. UNIC C2 is a distributed and bus-based system in which the monitoring and control function is placed close to the point of measurement and control. This significantly simplifies both the on- and off-engine wiring. Additionally, the advanced functions in the system, e.g. for diagnostics and control, provide outstanding performance and reliability, and the need for off-engine systems is significantly reduced. The UNIC C2 system provides the following functionality: • Complete engine safety system • Complete local monitoring, including all readings, events and diagnostics
• Speed and load control (electronic speed control by MCM if engine equipped with actuator, otherwise by mechanical governor) • Complete engine control, including start/ stop, load reduction request, etc. • Alarm signal provision • Full system diagnostics • Fieldbus interface The engine control system is designed to: • Provide a compact embedded engine control and management system for spacesaving applications, • Reduce installation and commissioning time by providing a very simple fieldbus-based interface that is delivered pre-tested and fully operational from the factory, • Achieve the highest possible reliability with components, e.g. sensors, designed
UNIC C1
UNIC C2
The engine control system is designed to: • Achieve the highest possible reliability, with components, e.g. sensors, designed specifically for the on-engine environment, • Reduce cabling on and around the engine, with a clear point of interconnection and a standardized interface, and • Provide high performance with optimized and pre-tested controls. 12
For more details visit www.marinemegastore.com or call 0871 8732404
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