Lon Communication Protocol; Application - Hitachi Relion 670 Series Applications Manual

1MRK511407-UUS Rev. N
19.4

LON communication protocol

19.4.1

Application

IED
IEC05000663 V2 EN-US
Figure 120:
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 35:
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 directly. For more information of
the bay-to-bay communication, refer to the section Multiple command function.
Phasor measurement unit RES670
Application manual
Station HSI
MicroSCADA
Star coupler
RER 111
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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
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)
Section 19
Station communication
IP14420-1 v1
IP14863-1 v1
M14804-3 v6
M14804-32 v2
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