Schweitzer Engineering Laboratories SEL-2701 - Figure 1.2 Example Ethernet Substation Network

1.5
Date Code 20020501 SEL-2701 Ethernet Processor Instruction Manual
Introduction
Applications
Terminal Access
Use the SEL-2701 to provide terminal access over an Ethernet network to SEL
hosts and IEDs (Intelligent Electronic Devices) connected to SEL hosts that
incorporate an SEL-2701. Similar to connecting a PC (personal computer)
with terminal software to the front port of the host, you can use Telnet to
connect to the user interface of the host. The computer connecting to the SEL
host can be on the substation LAN (Local Area Network) or a remote LAN
with a WAN (Wide Area Network) connection to the substation LAN.
Many PC operating systems include a free Telnet application. Telnet
applications operate similarly to serial terminal applications. With a Telnet
application, you must specify an IP address and port number rather than a
serial port and baud rate to establish a Telnet session with the remote device.
After you start a Telnet session, your Telnet software operates as a terminal
program passing your keystrokes across the Ethernet network and displaying
responses.
If you have a network with the topology shown in Figure 1.2, you can
establish a direct Telnet connection from the Engineering Workstation to the
SEL-2701 in the SEL-2030, the SEL-2030, or the SEL-400 series relay. You
can also use the SEL-2030 transparent connection to reach the SEL relays and
IEDs connected to SEL-2030 serial ports. In this arrangement, the Telnet
application allows you to operate the user interface of the selected device
similarly to a direct serial connection.
Figure 1.2 Example Ethernet Substation Network.
Engineering
Workstation
SEL-2701
SEL-400 Series Relay
SEL-2701
Hub
SEL Relay
SEL Relay Non-SEL IED
SEL Relay
SEL-2030
Communications Processor
EIA-232
Ethernet