2.9
Date Code 20120126
Instruction Manual
SEL-2032 Communications Processor
Installation
Communications
You should use telephone line protection equipment where the line enters the
building for improved personnel safety and reduced damage to equipment
from ground-potential rise and other hazardous conditions. Connect the line
protection equipment to the modem following standard commercial telephone
wiring standards.
If you use one telephone line for both voice and SEL-2032 communications,
set the SEL-2032 modem port to ignore a specified number of rings before
answering, so that personnel at the site can answer the phone before the
modem answers. You can also provide a hook-switch in the phone line, so on-
site personnel can disconnect the telephone line from the modem; however,
you may want to use some type of timer instead to disconnect the line to
prevent them from leaving the modem disconnected.
If you have one telephone line to communicate with a mix of telephones and
modems in a site, you typically use a telephone port switch. Connect the
protection equipment to the telephone port switch, and the telephone port
switch to the SEL-2032 modem and other devices with standard telephone
wiring.
Data Flow Control
All SEL devices, including the SEL-2032, support XON/XOFF software data
flow control. You should select this option, or accept the XON/XOFF = Y
default for any communication setting where the SEL-2032 is connected to
another SEL device. Set RTS/CTS = N to connect an SEL-2032 to any SEL
device.
The SEL-2032 also supports RTS/CTS hardware data flow control. You
should select the RTS/CTS option only if the connected device uses RTS/CTS,
and does not use XON/XOFF flow control. Consult the instruction manual or
contact the device vendor to determine the proper flow control technique for
each non-SEL device. If you select RTS/CTS hardware data flow control,
make sure that the cable you are using to connect the device to the SEL-2032
has conductors for RTS/CTS.
Baud Rate
The default baud rate for the SEL-2032 front port, Port F, is 2400 baud. You
can change the Port F baud rate and the other Port F communication
parameters using the
SET P
command. You can force the Port F baud rate to
2400 baud by hardware jumper selection (see
).
The default baud rate for all rear-panel communication ports is 9600 baud.
You can change the baud rate for each of these ports and the associated
communication parameters with the
SET P
command. With an SEL relay
attached to one of the rear ports, the SEL-2032 will automatically set the baud
rate to match the relay baud rate when you request the SEL-2032 to perform
auto-configuration. With other IEDs attached to the ports, the SEL-2032 baud
rate may be automatically set to match the attached IED baud rate when you
request the SEL-2032 to perform the auto-baud function.
To change the communication baud rate with a device, you should change the
baud rate on the device first, either by baud rate jumper, dip switch or software
setting, then you should change the baud rate setting on the associated
SEL-2032 port using the
SET P
command. See
for more
information on making settings changes.
Summary of Contents for SEL-2032
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