The design and layout for a digital system.
convert it to the required Modbus protocol. Tis leads to a cargo gauging system
with far fewer deck components and a much simplified installation, especially beneficial for refit of existing tankers and products carriers. The receiving display system
communicates directly with the RS485 network automatically polling each sensor. With information received a full graphical display is provided with repeaters as required and outputs to other Shipboard systems such as Loading Computers.
The design and layout for a conventional analogue system. PSM has refitted the fuel and ballast tank
management system onboard the Royal Navy Carrier HMS Ocean. Te new system gathers level/volume data of all service, operational and aircraft fuel tanks on a common data highway. Displays are distributed at operating stations along this network bus, greatly improving the platform’s entire fuel management.
The Naval Architect November 2009 For tanker cargo systems, other devices,
such as radar gauges, can be added onto the RS485 / Modbus data loop. Tese devices typically require more power for operation, and so where I.S. compliance is needed, fewer can be included per data loop. However, they can still be protected using the same PSM design of safety barrier, and conversion modules to take their output signal and
Operational Benefits In operation the shipowner benefits from the enhanced reliability and stability digital electronics provide and ease of system maintenance. Spare transmitters may be carried un-configured, and should a replacement be required it can be programmed onboard using a simple utility which, runs on the central display and downloads the configuration for the intended duty from a back up library provided as part of the system. No specialist knowledge or calibration tools is needed. All other system components are simple plug in replacements with no set-up or calibration needs. NA
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In-depth
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