High Precision Inventory Tank Gauging System

Serial no:Serial no:Field Connection Unit Type FCU 2160UI:A division of Saab Marine Electronics ABA division of Saab Marine ElectronicsUI:MADE IN SWEDENABMADE IN SWEDENTechnical DescriptionField Communication Unit FCU 2160The Field Communication Unit (FCU) is a dataconcentrator that continuously polls data from fielddevices such as Radar Tank Gauges, Data AcquisitionUnits and Remote Display Units and stores them ina buffer memory. Whenever a request for data isreceived, the FCU can immediately send data froma group of tanks from the updated buffer memory.The FCU acts as a slave on the group bus and as amaster on the field bus. The unit has sixcommunication ports. The ports can be individuallyconfigured as either group bus ports or as field busports according to one of the alternatives below:Alternative No. of field No. ofbus ports group bus ports1 4 22 3 33 2 4Group busesFCUAn interface board can be connected for eachcommunication port. These boards can be eitherFCM boards for the TRL/2 Bus or FCI boards forRS-485 communication. Two group bus ports canalso be configured as RS-232 by connecting ajumper connector instead of an FCM or FCI board.As standard the Field Communication Unit isdelivered with six FCM boards and two RS-232jumper connectors.Each RTG and each Independent DAU has anindividual address on the field bus. Slave DAU:sand RDU:s use the same address as the RTG theyare connected to and do not have separateaddresses.Two FCU:s can be connected in parallel with oneunit operational and one working as “hot” redundantbackup for the other. The units are softwaremonitored and the backup unit is automaticallytriggered and activated in case of primary unitfailure. See page 41 for more information.0.23 m (9 in.)0.28 m (11 in.)Field Connection Unit Type FCU 2160Cable InletsFieldbusesFCU 2160 Field Communication Unit.28