1.7
Date Code 20020501 SEL-2701 Ethernet Processor Instruction Manual
Introduction
Applications
Figure 1.3 SEL Relays on Ethernet Network Using the SEL-2030.
Use the SEL-2701 and SEL-2030 to provide Ethernet networking and UCA2
connectivity for installed SEL relays that do not have card slots. It is not
necessary to replace protective relays or choose protective relays on the basis
of network interfaces to realize many of the benefits of Ethernet networks and
UCA2. All SEL-400 series relays have a network card slot. SEL relays from
other families and series do not have card slots. Relays without card slots may
use serial communication protocols to send data to other substation devices.
For example, a relay may have simultaneous serial connections to another
relay, an HMI, and an SEL communications processor. Many installations
include SEL-2030 Communications Processors with card slots, but do not
have Ethernet network connectivity.
Networking for Non-SEL EIA-232 IEDs
Add an SEL-2030 and SEL-2701 to your design to inexpensively and reliably
add Ethernet networking to your serial IEDs and gain the following features:
➤ Use Telnet for engineering connections to the SEL-2030 and
connected IEDs.
➤ Use FTP to collect snapshots of data regions in the SEL-2030
with FTP file exchange.
➤ Use UCA2 master devices to collect data from the SEL-2030
and connected relays.
➤ Use GOOSE to exchange control data between relays
connected to the SEL-2030 and other UCA2 IEDs.
Use the SEL-2701 and SEL-2030 to connect non-SEL IEDs to Ethernet and
UCA2 networks as shown in Figure 1.4 on page 1.8. Many non-SEL IEDs
such as protective relays, PLCs, and transformer monitors do not have UCA2
To Substation
Ethernet Network
SEL-2701
SEL Relay
SEL Relay Non-SEL IED
SEL Relay
SEL-2030
Communications Processor
EIA-232
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