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Operation
• If Signals have been silenced, they are resounded, the Signal Silence LED turns off, and the
Auto Signal Silence timer, if configured, is restarted
• Any additional non-disconnected strobes associated with the input are activated continuously
• Any additional non-disconnected signals associated with the new input are activated at the
evacuation rate
11.2 Two Stage Operation
In a two stage system, alarm inputs are either first stage (alert) inputs or second stage (general
alarm) inputs. First stage inputs include inputs from the following types of circuits: non-verified
alarm, verified alarm, sprinkler alarm, and water-flow alarm. Second stage inputs include alarms on
the general alarm circuits, activation of the General Alarm button, or expiration of the Auto General
Alarm timer. Any of these alarm inputs occurring when the panel is not already in alarm cause the
following:
• The buzzer sounds steadily
• If fire drill is active, it is cancelled
• The Common Alarm LED turns on
• The Common Alarm relay activates if Aux disconnect is not active
• The Auto Signal Silence timer, if configured, starts
• The Signal Silence Inhibit timer, if configured, starts
• All Non-disconnected NAC programmed to the input are activated provided that Aux
disconnect is not active
If the alarm is a second stage alarm,
• All non-disconnected strobe circuits are activated continuously
• All non-disconnected signal circuits are activated at the evacuation rate
• The General Alarm LED turns on.
If the alarm is a First Stage alarm,
• Non-disconnected strobe circuits programmed to that circuit are activated continuously
• Non-disconnected signal circuits programmed to that circuit are activated with the alert code
• The Auto General Alarm timer, if configured, starts
• The General Alarm Cancel LED starts flashing.
Subsequent First Stage alarms when the panel is already in alarm, cause the following:
• The buzzer sounds steadily
• If signals have been silenced as a result of the silence button or the Auto signal silence timer,
signals are resounded as they were before signal silence, the Signal Silence LED turns off,
and the Auto Signal Silence timer, if configured, is restarted
• If the panel is not already in General Alarm, additional non-disconnected signals programmed
to the new input are activated with the Alert Code (see NAC (Signal) Circuit Types on
page 77).
• If the panel is not already in General Alarm and if the General Alarm Cancel LED is on steady
NAC that the Auto General Alarm timer has been acknowledged the timer is restarted and the
General Alarm Cancel LED is extinguished.
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