14.
Automation System
Wärtsilä Unified Controls - UNIC is a fully embedded and distributed engine management
system, which handles all control functions on the engine; for example start sequencing, start
blocking, fuel injection, speed control, load sharing, normal stops and safety shutdowns.
The distributed modules communicate over an internal communication bus.
The power supply to each module is physically doubled on the engine for full redundancy.
Control signals to/from external systems are connected to the main cabinet on the engine.
Process data for alarm and monitoring are communicated over a Modbus TCP, or RS-485
serial link Modbus RTU connection to external systems.
14.1
Technical data and system overview
14.1.1
Ingress protection
The ingress protection class of the system is IP54.
14.1.2
Ambient temp for automation system
The system design and implementation of the engine allows for an ambient engine room
temperature of 55°C.
Single components such as electronic modules have a temperature rating not less than 70°C.
Fig 14-1
Architecture of UNIC
Short explanation of the modules used in the system:
Communication Module. Handles strategic control functions (such as start/stop sequen-
cing and speed/load control, i.e. "speed governing") of the engine.
The communication modules handle engine internal and external communication, as
well as hardwired external interfaces.
COM
The LOP (local operator panel) shows all engine measurements (e.g. temperatures and
pressures) and provides various engine status indications as well as an event history.
LOP
DAAB605814
14-1
14. Automation System
Wärtsilä 46F Product Guide
Summary of Contents for 46F Series
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