Positive Alarm Sequence | Operating Instructions |
4.19 Positive Alarm Sequence
PAS (Positive Alarm Sequence) option will program a smoke detector to delay panel activation (including alarm relay and communicator) for a period of 15 seconds. Zone 97, however, will activate immediately and may be used to connect a signaling device to indicate PAS activation. Do not assign Zone 97 to a Notification Appliance Circuit when using this zone to indicate a PAS condition.
When a detector triggers an alarm, the onboard piezo sounds immediately, but the NACs are prevented 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 duration 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 during 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 97 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 immediately 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 PAS BYPASS.
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