Fairmount Automation representatives worked closely with engineers from the Naval Surface Warfare Center (NSWC) in Philadelphia (Code 9223), to develop a new implementation of Ship Alteration 480D, formerly based on a Foundation Fieldbus solution. The new control system consists of a network of five Chameleon PACs that regulate the cooling of the four Ships Service Diesel Generators (SSDGs), as well as the SSDG waste heat temperature, the fuel temperature in two sets of oil service and transfer heaters, the hot water tank temperature, and the start-air-mixer air temperature. Chameleon PACs are also controlling the main engine lube oil purifier, cooler, and service pressure loops.

The Chameleon controllers are connected over an RS-485 multi-drop network to a Wonderware® InTouch® Human-Machine Interface (HMI) operating in the ship's Central Control Station (CCS). The touch-screen HMI allows operators to remotely monitor all of the processes, log alarm events, adjust set-points, and take manual control over various process loops.

The picture on the left shows a Chameleon controller located in Aux 3 on the ship.  These controllers are regulating the temperature of the ships hot water tank (hotel services) as well as jacket water temperature and waste heat temperature for SSDG #4.

These Chameleon PAC controllers in Aux 2 of the ship are responsible for controlling two sets of oil service and transfer heaters as well as the jacket water cooling and waste heat temperature on SSDGs #3 and #4. 

Located in the main engine room, this Chameleon controller regulates the main engine's lube oil purifier temperature, cooler, service pressure loops.

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