ABB Relion 670 Series Applications Manual page 483

1MRK 511 358-UUS A
Section 19
19.1 Binary signal transfer
19.1.1 Identification
Function description
19.1.2 Application
The IEDs can be equipped with communication devices for line differential communication and/or
communication of binary signals between IEDs. The same communication hardware is used for
both purposes.
Communication between two IEDs geographically on different locations is a fundamental part of
the line differential function.
Sending of binary signals between two IEDs, one in each end of a power line is used in
teleprotection schemes and for direct transfer trips. In addition to this, there are application
possibilities, for example, blocking/enabling functionality in the remote substation, changing
setting group in the remote IED depending on the switching situation in the local substation and
so on.
When equipped with a LDCM, a 64 kbit/s communication channel can be connected to the IED,
which will then have the capacity of 192 binary signals to be communicated with a remote IED.
19.1.2.1 Communication hardware solutions
The LDCM (Line Data Communication Module) has an optical connection such that two IEDs can be
connected over a direct fiber (multimode), as shown in figure 225. The protocol used is IEEE/ANSI
C37.94. The distance with this solution is typical 110 km/68 miles.
Application manual
Remote communication
Binary signal transfer
Binary signal transfer
IEC 61850 IEC 60617
identification identification
BinSignReceive -
BinSignTransm -
Remote communication
ANSI/IEEE C37.2
device number
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Section 19
IP12423-1 v2
M14849-1 v2
IP16245-1 v1
M12844-3 v3
M12844-11 v4
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