Establishing Connection And Verifying The Lon Communication; Communication Via The Rear Ports; Lon Communication - ABB RELION 650 Series Commissioning Manual

1MRK 506 366-UEN A
Section 7
7.1

Communication via the rear ports

7.1.1

LON communication

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.
IED
IEC05000663 V2 EN-US
Figure 9:
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.
The fibre optic LON bus is implemented using either glass core or plastic core fibre optic
cables.
Table 9:
Cable connector
Cable diameter
Max. cable length
Table continues on next page
Commissioning manual
Establishing connection and
verifying the LON communication
Station HSI
MicroSCADA
Star coupler
RER 111
IED
Example of LON communication structure for a station automation system
Specification of the fibre optic connectors
Glass fibre
ST-connector
62.5/125 m
1000 m

Establishing connection and verifying the LON communication

Control Center
Gateway
IED
IEC05000663-1-en.vsd
Plastic fibre
snap-in connector
1 mm
10 m
Section 7
M12196-2 v1
M12196-4 v5
M14804-3 v4
45