2.12
SEL-734 Meter Instruction Manual Date Code 20090730
Installation
Making Rear-Panel Connections
should not exceed five. To determine the number of devices you can connect
to the line, contact your local telephone company to find the maximum REN
for your calling area.
If your system causes harm to the telephone network, the telephone company
may discontinue service temporarily. If possible, they will notify you in
advance. If advance notification is not practical, you will be notified as soon
as possible. Your telephone company may make changes in its facilities,
equipment, operations, or procedures that could affect proper functioning of
your equipment. If they do, they should notify you in advance to give you an
opportunity to maintain uninterrupted telephone service.
The serial PORT 4 EIA-485 plug-in connector accepts wire size AWG 24
through 12. Strip the wires 8 mm (0.31 inches) and install with a small
slotted-tip screwdriver.
All EIA-232 ports accept 9-pin D-subminiature male connectors. PORT 3 on all
the SEL-734 models includes the IRIG-B time-code signal input (see the
following discussion on IRIG-B Time-Code Input on page 2.13 and
Table 10.6).
The pin definitions for all the ports are given on the top panel and detailed in
Table 10.6 through Table 10.8.
Refer to Table 2.3 for a list of cables available from SEL-734 for various
communication applications. Refer to Section 10: Communications for
detailed cable diagrams for selected cables (cable diagrams precede
Table 10.8).
For example, to connect any EIA-232 port to the 9-pin male connector on a
laptop computer, order SEL Cable C287 and specify the length needed
(standard length is eight feet). Order SEL Cable C273A to connect the
SEL-734 Meter PORT 3 to the SEL-2032, SEL-2030, or SEL-2020
Communications Processor that supplies the communication link and the
IRIG-B time synchronization signal.
SEL offers a ruggedized version of many of our standard communication
cables. Ruggedized cables feature metal connector shells and improved
shielding, that reduce bit errors during EMC events. These cables offer greater
communications reliability in electrically noisy environments.
For connecting devices at distances over 100 feet, where metallic cable is not
appropriate, SEL offers fiber-optic transceivers. The SEL-2800 family of
transceivers provides fiber-optic links between devices for electrical isolation
and long-distance signal transmission up to 80 km. Contact SEL for further
information on these products.
Table 2.3 Communication Cables Used to Connect the SEL-734 to Other Devices
SEL-734 EIA-232
Serial Ports
Connect to Device
SEL Standard
Cable No.
SEL Ruggedized
Cable No.
All EIA-232 ports PC, 25-Pin Male (DTE) C227A C227R
All EIA-232 ports Laptop PC, 9-Pin Male (DTE) C287 C287R
EIA-232 PORT 3 SEL-2032/2030/2020/2100 without IRIG-B C272A C272R
EIA-232 PORT 3 SEL-2032/2030/2020/2100 with IRIG-B C273A C273R
All EIA-232 ports Standard Modem, 25-Pin Female (DCE) C222 C222R
Front Optical Port ANSI C12.18 Optical Probe C660/C661 n/a
Courtesy of NationalSwitchgear.com
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