User`s manual

Operations
Introduction
Certain questions are bound to occur about how
the Security System 8300 operates or responds in
certain circumstances. The following information
deals with some of the most likely questions.
Refer to Chapter 3 for discussion of “Function
Numbers.”
Operations
During AC Power Loss
When AC power is interrupted for more than 180
seconds, the CCU can tell the monitoring service
(Function Number 315). It also tells the Display
Control Center keypads, which immediately
reduce unnecessary loading by turning off their
display backlighting (20-30 ma each), except
during use, and change the yellow “system” LED
from steady on to flashing (signifying Trouble); no
other accessory power is turned off. The key-
pads’ high-efficiency status LED’s are left on to
help locate the keypad in the dark and provide
information to the user.
The system continues all other operations on
battery power as long as the battery voltage
remains above 10.1 volts.
The standard CCU battery is a 7 ampere-hour
battery and powers the system until its voltage
falls to below 10.1 volts. When the battery voltage
decreases to below 10.1 volts, the system will
suspend operation. At this time, it can report
Suspended Operation to the monitoring service
(see manual programming Function Number 316,
Chapter Ill) and has the capability to send the
64-
event Event History (see manual program Func-
tion Number 317) if the monitoring service has an
AT&T FSK compatible receivers.
When operation is suspended, all voltage to any
circuitry is removed. No voltage is supplied to
any accessory device, all microprocessors are off,
no system lights are on, and the system will not
respond to the Reset button. There will be no
response to any events during the time of suspen-
sion and the system will not alarm on any violation
that occurred during the suspension. The system
status and programming, event history, and the
clock time at that instant will be retained. How-
ever, since the microprocessors are off, neither
the date nor the time of day will advance.
When power is returned to the system, it may be
necessary to reset the clock (and perhaps the
calendar).
However, the system will return to
AT&T Security System 8300 Installer’s Manual
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