Establishing Connection And Verifying The Lon Communication; Communication Via The Rear Ports; Lon Communication - Hitachi RER670 Commissioning Manual

1MRK 506 377-UEN Rev. L
Section 7
7.1

Communication via the rear ports

7.1.1

LON communication

LON communication is normally used in substation 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.
IED
IEC05000663 V2 EN-US
Figure 8:
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 13:
Cable connector
Cable diameter
Max. cable length
Table continues on next page
Railway application RER670
Commissioning manual
Establishing connection and
verifying the LON communication
Station HSI
MicroSCADA
Star coupler
RER 111
IED
Example of LON communication structure for a substation automation system
Specification of the fiber optic connectors
Glass fiber
ST-connector
62.5/125 m
1000 m
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Establishing connection and verifying the LON communication

Control Center
Gateway
IED
IEC05000663-1-en.vsd
Plastic fiber
snap-in connector
1 mm
10 m
Section 7
M12196-2 v1
M12196-4 v6
M14804-3 v6
49