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10 Communication
10.2.2.3 Connections and Topologies
Each device is connected to an exchanger via communication cable and thereby to form a star
structure network. Dual-network is recommended in order to increase reliability. The SCADA is
also connected to the exchanger and will play a role of master station, so the every equipment
which has been connected to the exchanger will play a role of slave unit.
PCS-96XX
Series Relay
10.2.3 IEC60870-5-103 Communication
The IEC specification IEC60870-5-103: Telecontrol Equipment and Systems, Part 5: Transmission
Protocols Section 103 defines the use of standards IEC60870-5-1 to IEC60870-5-5 to perform
communication with protection equipment. The IEC60870-5-103 protocol is to use a twisted pair
EIA RS-485 connection over distances up to 500m. This relay operates as a slave in the system,
responding to commands from a master station.
10.2.4 IEC61850 Communication
The IEC specification IEC61850: Communication Networks and Systems in Substations, a new
protocol defines the communication standards in substations. The standard configuration for the
IEC61850 protocol is based on the Ethernet.
10.2.5 DNP3.0 Communication
The DNP3.0 (Distributed Network Protocol) protocol can support the OSI/EPA model of the ISO
(International Organization for Standards), and it includes four parts: application layer protocol,
transport functions, data link layer protocol and data object library. The DNP3.0 protocol is
recommended to use the Ethernet network. This relay operates as a slave in the system,
responding to commands from a master station.
10.3 IEC60870-5-103 Interface
The IEC60870-5-103 interface is a master/slave interface with this relay as the slave device.
10-4
SCADA
Exchanger A
Exchanger B
PCS-96XX
..............................
Series Relay
Figure 10.2-4 Ethernet communication structure
Date: 2014-04-08
PCS-96XX
Series Relay
PCS-9611 Feeder Relay
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