ABB Relion 670 Series Applications Manual page 471

1MRK 511 358-UUS A
To get higher availability in the protection functions, it is possible to avoid blocking if time
synchronization is lost when there is a single source of analog data. This means that if there is only
one physical MU and no TRM, parameter
HwSyncSrc can still be set to PPS . This will keep analog and binary data correlated in disturbance
recordings while not blocking the protection functions if PPS is lost.
18.4 LON communication protocol
18.4.1 Application
IED
IEC05000663 V2 EN-US
Figure 221: 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.
The fiber optic LON bus is implemented using either glass core or plastic core fiber optic cables.
Table 46: Specification of the fiber optic connectors
Cable connector
Cable diameter
Max. cable length
Wavelength
Transmitted power
Receiver sensitivity
Application manual
AppSynch can be set to NoSynch but parameter
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)
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)
Section 18
Station communication
IP14420-1 v1
IP14863-1 v1
M14804-3 v3
465