In order to prevent unauthorized access, the RFL 9660
features three different levels of security and an
access alarm output. In the first level of security, each
device port can be protected with a password. The
second level adds a log-on password that must be used
when the switch is first called. The third level has a
callback feature that causes the RFL 9660 to call the
user back at a preset telephone location before
access is allowed.
Any installation where isolation from ground
potential rise is important.
Any installation where ambient noise levels
are high.
Any installation where it is difficult to run
RS-232 cables.
Any installation where distances greater than those
recommended by RS-232 must be covered.
Passwords are assigned by a designated "super-user."
Any time the RFL 9660 is accessed (either remotely
or locally), an access alarm relay contact
will close. The RFL 9660 is available with a built-in 28.8 bps
These contact closures can be externally monitored modem that is Ha~es-com~atible and complies with
or logged.
CCITT V.34 bis and Bell 212A. By replacing this
modem with a direct digital interface, an external
All port configuration is software-controlled and con-
figuration parameters can be re-programmed locally
or remotely. New values are stored in the RFL 9660's
non-volatile memory so configurations will be retained
even during loss of power.
fer rates up to
19.2
kbs.
Each device port on the RFL 9660 can be individually
RFL
96
0%
FIBER
OPTIC
REMOTE
FIBER
:..I
DATA
ACT
lVE
ADDRESS
--.
:;;;.-;;;.-;;
:
I
--.
?*..
,'.
. .
. .
.
..
-
,.........).
--
-
--
----
-
.
*L
programmed to match the requirements of the device
connected to it. Ports can be given physical names
and functions such as baud rate, parity, number of data
bits, and types of flow control can be individually
programmed.
The RFL 9660 can communicate over a fiber optic loop
when it is equipped with a fiber optic master 110
Typical fiber optic remote transceiver module
module. A separate fiber optic remote transceiver
17
module connects each device to the fiber loop. Using
When
working
at
the
substation,
a
local
RS-232
port
multimode fiber and ST-type connectors, the loop
operates at 850 nm.
is available on the front of the RFL 9660. This allows
you to configure the system or interrogate devices in
the substation by
con-netting
a terminal or portable
PC directly to the RFL 9660. While the modem is in
use, access to the RFL 9660 through the local
RS-232 port is denied.
October
1,
2000
Publication
No.
PI9660
To Next Page
Loading...