2.5
Date Code 20120126
Instruction Manual
SEL-2032 Communications Processor
Installation
Mounting and Connections
Where distance between the SEL-2032 and a device exceeds the cable length
recommended for conventional EIA-232 metallic conductor cables, you can
use transceivers to provide isolation and to establish communications to
remote locations. Unfortunately, conventional short-haul, fiber-optic, and
telephone modems do not support IRIG-B signal transmission, so their use
requires that you use some other method to synchronize the remote IED.
However, special fiber-optic transceivers (like the SEL-2810) include a
channel for the IRIG-B time code; these transceivers enable you to more
precisely synchronize devices that are capable of receiving IRIG-B time code,
with a single-pair fiber-optic communication link.
The IRIG-B signal includes code for day-of-the-year and time-of-day. It does
not include a code to identify the year. To set the device calendar to the proper
year, you need to set the date on each device receiving an IRIG-B signal. Most
SEL relays store the year for the set date with the relay settings in nonvolatile
memory, so once the date is properly set, the relay will maintain the proper
year even if relay power is cycled off and on.
Communication
Circuit
Connections
The SEL-2032 is equipped with 16 rear-panel serial communication ports,
labeled
PORT 1
–
PORT 16
and one front-panel serial communication port, labeled
PORT F
. The data connection for each SEL-2032 serial communication port
uses EIA-232 standard signal levels in a 9-pin, subminiature “D” connector
(see
). EIA-232 interfaces are supported by almost all
modern relays, meters, computers, and communications devices.
Figure 2.1
9-Pin Connector Pin Number Convention
The communication circuits are protected internally by low-energy, low-
voltage MOVs and passive RC filters.
You should keep the length of the communication cables as short as possible
to minimize communication circuit interference and also to minimize the
magnitude of hazardous ground potential differences that can develop during
abnormal power system conditions. See
Communication Cables on page 2.6
for additional details and restrictions.
5 4 3 2 1
9 8 7 6
Female chassis connector, as viewed from outside panel.
Содержание SEL-2032
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