Figure 3.5 Sel-2505 Dip Switch Settings For M; Figure 3.6 Tar Roka Command From An Sel-351 - Sel -3031 Instruction Manual

SEL-2505 and SEL-2506 Settings
The SEL-2505 and SEL-2506 use control (DIP) switches to set the
connection. For easy installation order the SEL-2505 with the SEL-2812 fiber-optic
option (SEL-2505x6xXX). Use multimode SEL-C808 or SEL-C807 ST terminated
fiber-optic cable to directly connect the SEL-2505 to an SEL-3031 equipped with a
fiber-optic option for Port 1. Other transceiver models can be used as long as the
corresponding SEL-2800 family transceiver is used on both ends.

Figure 3.5 SEL-2505 DIP Switch Settings for M

Set the TX_ADD equal to one and set RX_ADD equal to two at the local end. At the
remote end, set the RXID equal to two and the TXID equal to one. The devices use
these addresses so that the master relay only receives messages sent by a relay with the
matching transmit address and vice versa.
Set Switch 9 and 10 equal to MB8/9600, MB8/19200, or MB8/38400 for the
Protocol/Baud setting. If the SEL-3031 contains the SEL-3044 Encryption Card then
the Protocol/Baud setting must be MB8/9600 or MB8/19200.
To connect the SEL-2505 to the radio, use a 62.5 μm multimode SEL-C808 or
SEL-C807 fiber-optic cable. Order these cables equipped with ST
your choice of zipcord or waterproof heavy-duty jacketed fibers.
Initial Checkout
An easy way to verify that the relays are communicating is to use the TARget
command, as shown below.
=>TAR ROKA <Enter>
LBOKB CBADB
0 0

Figure 3.6 TAR ROKA Command From an SEL-351

The results shown here are from an SEL-351 Relay. ROKA is asserted, meaning that
the two relays have established
tests, use the COM report command available in the relay and suggestions described in
Monitoring Radio Performance on page 5.1.
Date Code 20211103
High-Speed Teleprotection or Control With M
RBADB ROKB LBOKA
0 0 0
M B
IRRORED ITS
IRRORED
B
IRRORED
CBADA RBADA ROKA
0 0 1
communication. For longer-term channel
Job Done Examples
B Communications
ITS
M B
IRRORED ITS
Connection
ITS
®
connectors and
SEL-3031 Instruction Manual
3.5