2.7
Date Code 20120126 Instruction Manual SEL-2032 Communications Processor
Installation
Mounting and Connections
NOTE: Never use standard null-
modem cables with the SEL-2032.
Using any non-SEL cable can cause
severe power and ground problems
involving pins 1, 4, and 6 on the
SEL-2032 communication ports.
Please call the SEL factory if you have any questions about cables and cable
connections.
The following list provides additional rules and practices you should follow
for successful communication using EIA-232 serial communication devices
and cables:
➤ 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.
➤ EIA-232 communication cable lengths should never exceed 50
feet, and you should always use shielded cables for
communication circuit lengths greater than 10 feet.
➤ Modems are required for communication over long distances
and to provide isolation from ground potential differences
between device locations.
➤ Route communication cables well away from power and
control circuits. Switching spikes and surges in power and
control circuits can cause noise in the communications circuits
if not adequately separated.
➤ Lower baud rate communication is less susceptible to
interference and will transmit greater distances over the same
medium than with higher baud rates. You should use the lowest
baud rate that provides adequate data transfer speed.
Network
Connections
See your plug-in protocol card instruction manual to determine appropriate
network connection methods.
Cable Pinout
Configuration
Figure 2.2 shows the cable pinout configuration for cables that connect the
SEL-2032 to a local PC for configuration. Use this cable type with a terminal
emulation program or the SEL-5020 Settings Assistant software.
C272A 9-pin DTE devices
without IRIG
DB-9P DTE no no
C273A 9-pin DTE devices
w/ IRIG: SEL-500
series, SEL-300
series except
SEL-321
DB-9P DTE/
IRIG-B
yes yes
Table 2.4 Communication Cables for Devices Attached to SEL-2032
(Sheet 2 of 2)
SEL
Cable #
Connect
SEL-2032 to:
Remote
Connector
(on cable)
Port Type
RTS/CTS
Supported
IRIG-B
Included
Courtesy of NationalSwitchgear.com
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