MS-9050 Series Manual — P/N 52413:F 10/22/2010 157
Special System Timers Operating Instructions
When a detector triggers an alarm, the onboard piezo sounds immediately, but the NACs are pre-
vented from activating for 15 seconds. This inhibit time is factory set and cannot be changed.
Pressing the Alarm Silence or Acknowledge/Step key during the 15 second inhibit time will silence
the piezo sounder and start a timer which prevents activation of NACs for an additional time dura-
tion which can be user programmed for up to three minutes. After the programmed delay, the
NACs will activate if the source of the alarm is not cleared. Note that if a second alarm occurs dur-
ing either time delay, the alarm will be processed immediately, causing activation of the appropriate
output zones. The events which occur upon PAS activation are as follows:
onboard piezo sounds immediately
control panel LCD display will indicate a presignal event and the active point
control points programmed to Zone 17 will activate
annunciators (if enabled) will sound the local piezo, and pulse the alarm LED and zone LED
outputs (NACs and control modules) of associated zones will be inhibited from activating
for a factory set duration of 15 seconds
pressing the Alarm Silence or Acknowledge/Step key will start a timer which inhibits output
activation for additional time delay of up to three minutes which is user programmable
second alarm occurring anytime during either time delay will cause immediate activation of
all associated outputs
PAS operation requires the approval of the local Authority Having Jurisdiction.
Note that the PAS BYPASS monitor type code, when activated, will inhibit the PAS capability until
the PAS BYPASS monitor is deactivated. While PAS is inhibited, signaling devices will immedi-
ately place the control panel into alarm. This feature may be employed by wiring a normally open
device, such as a switch, to a monitor module which has been programmed for PA S B YPA S S .
4.20 Special System Timers
4.20.1 Silence Inhibit Timer
This option, if selected, prevents the Alarm Silence key from functioning for 60 seconds following
an alarm. A new alarm during the initial 60 second period will not
cause the timer to restart with a
new 60 seconds. Silence Inhibit operation requires the approval of the local Authority Having
Jurisdiction.
4.20.2 Autosilence Timer
If Autosilence is selected, the notification appliances, programmed as silenceable, will automati-
cally be silenced after a programmable duration of from 5 to 30 minutes. Pressing the Drill key
will restart the timer. Autosilence operation requires the approval of the local Authority Having
Jurisdiction.
4.20.3 Trouble Reminder
If selected, this feature causes a reminding ‘beep’ every 15 seconds during an alarm (after the
Alarm Silence key is pressed) and every two minutes during a trouble condition (after the Acknowl-
edge/Step or Alarm Silence key is pressed). The ‘beeps’ from the onboard piezo sounder will occur
until the alarm or fault is cleared.
Note that enabling/disabling the Trouble Reminder feature has no effect on Trouble Resound.
When an existing trouble in the system is silenced, if the trouble condition is not cleared before
midnight, the piezo will resound, indicating that the trouble condition still exists.
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