The Lon Protocol - ABB RET670 Installation And Commissioning Manual

Section 10
Establishing connection and verifying the LON communication
10.2.1
94
Station HSI
MicroSCADA
IED
IEC05000663 V2 EN
Figure 50: 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 in the 670 series 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 13: Specification of the fibre optic connectors
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.
Gateway
Star coupler
RER 111
IED
Glass fibre
ST-connector
62.5/125 m
1000 m
820-900 nm
-13 dBm (HFBR-1414)
-24 dBm (HFBR-2412)
1MRK 504 088-UEN C
Control Center
IED
IEC05000663-1-en.vsd
Plastic fibre
snap-in connector
1 mm
10 m
660 nm
-13 dBm (HFBR-1521)
-20 dBm (HFBR-2521)
Installation and commissioning manual