ABB Relion 670 Series Applications Manual page 540

Section 20
Station communication
20.4 LON communication protocol
20.4.1 Application
IED
IEC05000663 V2 EN-US
Figure 242: Example of LON communication structure for a substation automation system
An optical network can be used within the substation automation system. This enables
communication with the IEDs through the LON bus from the operator's workplace, from the
control center and also from other IEDs via bay-to-bay horizontal communication. For LON
communication an SLM card should be ordered for the IEDs.
The fiber optic LON bus is implemented using either glass core or plastic core fiber optic cables.
Table 68: Specification of the fiber optic connectors
Cable connector
Cable diameter
Max. cable length
Wavelength
Transmitted power
Receiver sensitivity
The LON Protocol
The LON protocol is specified in the LonTalkProtocol Specification Version 3 from Echelon
Corporation. 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 each other
534
Station HSI
MicroSCADA
Star coupler
RER 111
IED
Glass fiber
ST-connector
62.5/125 m
1000 m
820-900 nm
-13 dBm (HFBR-1414)
-24 dBm (HFBR-2412)
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Control Center
Gateway
IED
IEC05000663-1-en.vsd
Plastic fiber
snap-in connector
1 mm
10 m
660 nm
-13 dBm (HFBR-1521)
-20 dBm (HFBR-2521)
1MRK 511 401-UUS F
IP14420-1 v1
IP14863-1 v1
M14804-3 v6
M14804-32 v2
Bay control REC670
Application manual