Section 7
Establishing connection and
verifying the LON communication
7.1
Communication via the rear ports
M12196-2 v1
7.1.1
LON communication
M12196-4 v6
LON communication is normally used in station automation systems. Optical fiber is used
within the substation as the physical communication link.
The test can only be carried out when the whole communication system is installed. Thus, the
test is a system test and is not dealt with here.
M14804-3 v6
Control Center
IED
IED
IED
Gateway
Star coupler
RER 111
Station HSI
MicroSCADA
IEC05000663-1-en.vsd
IEC05000663 V2 EN-US
Figure 8:
Example of LON communication structure for a station automation system
An optical network can be used within the station 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 8:
Specification of the fiber optic connectors
Glass fiber
Plastic fiber
Cable connector
ST-connector
snap-in connector
Cable diameter
62.5/125 m
1 mm
Max. cable length
1000 m
10 m
Table continues on next page
1MRK 505 385-UEN C
Section 7
Establishing connection and verifying the LON communication
Breaker protection REQ650
43
Commissioning manual
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