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Page 24
SECTION 4 - RS-232 INTERFACE
Up to five RS-232 ports are available in the 4120 FIP. The RS-232 interface option supports
both printers and video terminals to annunciate alarm, isolate and fault conditions.
4.1
RS-232 PORT ACCESS LEVELS
The 4120 FIP interface panel, and each RS-232 Interface Port configured for a video
terminal, are programmed to allow certain operations at each access level. You must be
"logged in" at the required access level or higher to perform the various system operations.
Up to 20 operators are allowed to log in at the various passcode access levels. The number
of operators, passcode access levels, and the allowed operations are programmed into the
system dependent on the customer requirements.
If a port is not configured to annunciate a class of events, such as isolate conditions, you will
not be able to acknowledge those points with the video terminal keyboard, even though the
video terminal is connected to that port, regardless of the passcode level entered. Table 1
lists the default protection levels for the RS-232 interface. These levels are programmed to
meet customer requirements.
Alarm Silence
System Reset
Alarm Acknowledge
Fault Acknowledge
Isolate Acknowledge
Clear Historical Logs
Alarm
Fault
NOTE:
Access level from the RS-232 video terminal/keyboard port is separate from
the interface panel access level.
4.2
THE VIDEO TERMINAL
The video terminal, or CRT (for the Cathode Ray Tube video display), provides annunciation
and system control from the CRT display keyboard. This allows you to use the CRT to
control most of the functionality of the system. The CRT allows you to perform the following
procedures from its keyboard.
Document No.: 4100-M004
SIMPLEX 4120 NETWORK FIRE INDICATOR PANEL
Table 1
RS-232 Interface Default Protection Levels
EVENT
June 1997
OPERATOR MANUAL
DEFAULT
1
1
1
1
1
3
3
Issue 1.0
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