1.2
SEL-2701 Ethernet Processor Instruction Manual Date Code 20020501
Introduction
Features
Features
The SEL-2701 is an Ethernet processor card designed for use in SEL hosts
including the SEL-2030 Communications Processor and SEL-400 series
relays. The SEL-2701 provides the following features:
➤ Powerful processor
➤ Extended temperature rating
➤ Ethernet network connection
➢ Twisted-pair cable
➢ Fiber-optic cable
➢ Redundant physical interfaces
➤ Support for TCP/IP protocol suite
➢ FTP (File Transfer Protocol)
➢ Telnet
➤ UCA2 for Field Devices
➢ OSI and TCP/IP protocol stacks
➢ GOMSFE models
➢ GOOSE messages
The SEL-2701 is a complete communication processing system with a
processor, memory, interface to the host, and Ethernet physical interface. The
host and processor card architecture uses the SEL-2701 for all network tasks.
The effect of isolating the host processor from communication processing is
that network activity does not degrade protection. You can also upgrade or
replace the SEL-2701 without disturbing settings or firmware in the host.
The operating temperature range of the SEL-2701 (–40° to +70°C) surpasses
that of standard office-grade Ethernet network equipment. The combination of
operating temperature range and additional environmental hardening,
described in Specifications on page 1.17, prepares the SEL-2701 for operation
in the harsh environment of substation control houses.
You can connect an SEL-2701 to several different Ethernet media. Use fiber-
optic cable to electrically isolate devices and provide a medium immune to
most electrical and magnetic interference. Use twisted-pair cable to reduce
installation cost where electrical isolation and noise concerns have been
addressed in other ways. The SEL-2701 twisted-pair interface is significantly
more robust than typical office-grade equipment protecting both the Ethernet
processor and its host.
The TCP/IP (Transmission Control Protocol/Internet Protocol) protocol suite
is one of the most recognized protocol suites (stack plus application protocols)
used on Ethernet networks because it is part of the Internet. The SEL-2701
supports the TCP/IP protocol stack. It also supports the TCP/IP application
layer protocols, FTP and Telnet.
The SEL-2701 provides a UCA2 (Utility Communication Architecture 2.0)
for Field Devices interface for SEL hosts. It also supports the OSI (Open
System Interconnect) and TCP/IP protocol stacks for UCA2 operations. The
SEL-2701 supports GOMSFE models and GOOSE peer-to-peer messaging.
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