Hitachi Relion 670 Series Applications Manual page 385

1MRK506375-UEN Rev. N
18.6 IEC 60870-5-103 communication protocol
18.6.1 Application
IED
IEC05000660 V4 EN-US
Figure 194:
IEC 60870-5-103 communication protocol is mainly used when a protection IED communicates with
a third party control or monitoring system. This system must have software that can interpret the IEC
60870-5-103 communication messages.
When communicating locally in the station using a Personal Computer (PC) or a Remote Terminal
Unit (RTU) connected to the Communication and processing module, the only hardware needed is
optical fibers and an opto/electrical converter for the PC/RTU, or a RS-485 connection depending on
the used IED communication interface.
18.6.1.1 Functionality
IEC 60870-5-103 is an unbalanced (master-slave) protocol for coded-bit serial communication
exchanging information with a control system. In IEC terminology a primary station is a master and a
secondary station is a slave. The communication is based on a point-to-point principle. The master
must have software that can interpret the IEC 60870-5-103 communication messages. For detailed
information about IEC 60870-5-103, refer to IEC 60870 standard part 5: Transmission protocols, and
to the section 103, Companion standard for the informative interface of protection equipment.
18.6.1.2 Design
General
The protocol implementation consists of the following functions:
Railway application RER670
Application manual
Station HSI
Star coupler
IED
Example of IEC 60870-5-103 communication structure for a substation
automation system
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TCP/IP
Control Center
Gateway
IED
IEC05000660-4-en.vsd
Section 18
Station communication
IP14615-1 v2
IP14864-1 v1
M17109-3 v7
M17109-38 v3
M17109-41 v1
M17109-43 v2
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