Remote Communication; Binary Signal Transfer; Identification; Application - Hitachi Relion 670 Series Applications Manual

1MRK511407-UUS Rev. N
Section 20
20.1

Binary signal transfer

20.1.1

Identification

Function description
Binary signal transfer, receive
Binary signal transfer, 2Mbit
receive
Binary signal transfer,
transmit
Binary signal transfer, 2Mbit
transmit
20.1.2

Application

The IEDs can be equipped with communication devices for line differential communication (not applicable
for RER670) and/or communication of binary signals between IEDs. The same communication hardware
is used for both purposes.
Sending of binary signals between two IEDs 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.
If equipped with a 64kbit/s LDCM module, the IED can be configured to send either 192 binary signals or
3 analog and 8 binary signals to a remote IED. If equipped with a 2Mbps LDCM module, the IED can
send 9 analog channels and 192 binary channels to a remote IED.
This functionality is mainly used for the line differential protection. However, it can be used in other
products as well.
LDCM is preferably intended to be used in binary mode. However, in case the LDCM module is used in
the analog mode, then the only available pre-processing SMAI blocks will be either in 3ms or 8ms cycle.
Connecting the remote currents to either of these two types of SMAI blocks might impact the
performance of protection functions. Namely, all functions that are running in the same cycle as the used
processing SMAI block for the remote currents may experience extra time delays in the operation due to
the impact of LDCM buffering and transmission delays. Thus, the application of LDCM in analog mode
shall be used with caution.
Important to know when connecting LDCM to SMAI function block with 3 or 8 ms cycle time.
Phasor measurement unit RES670
Application manual

Remote communication

IEC 61850 identification
BinSignRec1_1
BinSignRec1_2
BSR2M_305
BSR2M_312
BSR2M_322
BSR2M_306
BSR2M_313
BSR2M_323
BinSignTrans1_1
BinSignTrans1_2
BST2M_305
BST2M_312
BST2M_322
BST2M_306
BST2M_313
BST2M_323
© 2017 - 2023 Hitachi Energy. All rights reserved
IEC 60617 ANSI/IEEE C37.2
identification device number
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Section 20
Remote communication
IP12423-1 v3
M14849-1 v4
IP16245-1 v1
M12844-3 v5
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