Centralised PLC with Local or Remote IO
This is the most conventional form of system. The PLC is fitted generally within the engine AC\DC panels where it is local to the primary elements; engines, generators etc. The various digital and analogue connections from around the vessel are then hardwired back to the unit or we can supply remote digital or analogue IO blocks which can be arrayed around the vessel at suitable locations and which will then communicate back to the central PLC on a bus network.