15.3 LON communication protocol IP14420-1 v115.3.1 Application IP14863-1 v1M14804-3 v4Control CenterIED IEDIEDGatewayStar couplerRER 111Station HSIMicroSCADAIEC05000663-1-en.vsdIEC05000663 V2 EN-USFigure 97: Example of LON communication structure for a station automation systemAn optical network can be used within the station automation system. This enablescommunication with the IEDs through the LON bus from the operator’s workplace, from thecontrol center and also from other IEDs via bay-to-bay horizontal communication.The fibre optic LON bus is implemented using either glass core or plastic core fibre opticcables.Table 33: Specification of the fibre optic connectorsGlass fibre Plastic fibreCable connector ST-connector snap-in connectorCable diameter 62.5/125 m 1 mmMax. cable length 1000 m 10 mWavelength 820-900 nm 660 nmTransmitted power -13 dBm (HFBR-1414) -13 dBm (HFBR-1521)Receiver sensitivity -24 dBm (HFBR-2412) -20 dBm (HFBR-2521)The LON Protocol M14804-32 v2The LON protocol is specified in the LonTalkProtocol Specification Version 3 from EchelonCorporation. This protocol is designed for communication in control networks and is a peer-to-peer protocol where all the devices connected to the network can communicate with eachother directly. For more information of the bay-to-bay communication, refer to the sectionMultiple command function.Section 15 1MRK 504 158-UEN AStation communication232Application manual
