The Main System Control Unit is a computer controlled unit that both controls and reports upon the operation of the whole system. It provides a continuous status report on the condition of the system, and via its touch sensitive screen enables the operation of the Sound Projectors to be controlled.
The Control Unit will provide an alarm in the event of a fault occurring and if access is provided to the internet, then the system can be monitored remotely, which aids with the maintenance of the system, and can also provide reassure to the Regulators and other authorities that the system is operating correctly.
Two versions of the Power Supply Unit are available from FGS to provide the power supply for the System. The Model 3000 Power Supply Unit can provide power for up to 12 Sound Projectors, while the Model 1500 Power Supply Unit can provide power for up to six Sound Projectors.
The most appropriate Power Supply Unit for a system is dependent upon the number of Sound Projectors that need to be powered, the distance of the Control Equipment from the intake, and the operational requirements of the system.
The SILAS Control Unit and Power Supply Units form the Control Equipment of the system. The Control Equipment is typically housed in an air conditioned enclosure, or a Control Equipment Enclosure within an air conditioned plant room.
The Hub Junction Boxes act as the link between the Main System Control Unit and the Sound Projectors. The Hubs can be mounted either above or below water. The standard Hub can provide the link to a maximum of six Sound Projectors.
Typically monitoring cables run from the SILAS Control Unit to each of the Hub Junction Boxes, in a daisy chain, while Power Cables run separately from the Control Equipment Power Supply Units to each of the Hubs. ‘Flying Leads’ link each Sound Projector to the Hub. All of the cables supplied by FGS are underwater grade cables, and use underwater mateable connectors.
The acoustic system uses FGS MkIII 30-600 Sound Projectors, which are designed for large-scale installations. The amplifier and associated electronics that previously formed part of the Control Equipment in the MkII system have been miniaturised down in size and are now incorporated in the MkIII Sound Projectors. This has significantly cut down on the space needed for the Control Equipment, as well as reducing the number of cables required to operate the system.
The High Intensity Lights supplied with the MkIII Sound Projector are based upon LED technology and provide a brilliant white light to deflect the fish.
The deployment system for the Sound Projectors is usually designed to fit in with the physical constraints associated with the intake, and also the operational requirements of the system. Deployment systems may take many forms ranging from a simple rail to a custom made structure.
The Mk III SILAS system can be supplied without lights for sites where routine cleaning of the High Intensity Lights is not practical. This provides a SPA system, but with the control and diagnostic monitoring provided by the SILAS™ technology.