Communication Protocol
312 PRS-7367
9 Communication Protocol
9.1 Overview
This chapter introduces the data communication and the corresponding hardware of the IEDs. The
IED support a wide range of protocols via communication interface (RS-485 or Ethernet port). The
protocols are of international standard for communication in substations and it can be selected by
modifying the communication parameters.
Local communication with the IED via a computer is achievable thought both the front and back
Ethernet ports. Furthermore, remote communication with SCADA or the station gateway is also
achievable by choosing the IEC60870-5-103, IEC61850, DNP3.0 communication protocol via
RS485 or Ethernet port.
It should be noted that the descriptions contained within this chapter do not aim to fully detail the
protocol itself. This section serves to describe the specific implementation of the protocol in the
relay.
9.2 Rear Communication Interface
9.2.1 Ethernet Interface
This protective device can provide three rear Ethernet interfaces (optional) and they are
unattached each other. Parameters of each Ethernet port can be configured in the menu.
9.2.1.1 Ethernet Standardized Communication Cable
It is recommended to use twisted screened eight-core cable as the communication cable. A picture
is shown below.
Figure 9.2-1 Ethernet communication cable
9.2.1.2 Ethernet Communication protocol
Ethernet communication protocols are supported by the device including: IEC60870-5-103, PRP,
RSTP, DNP3.0, IEC61850 etc. For more details about these communication protocols, see the
correlative standards.
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