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Indicators, Controls and Operations
• If Signals have been silenced as a result of the Signal Silence button or the Auto Signal
Silence Timer, Signals are resounded as they were before Signal Silence, the Signal
Silence Indicator is turned off, and the Auto Signal Silence Timer, if configured, is
restarted. For UL installations, disable the auto signal silence timer
• Any additional non-disconnected strobes associated with the new input are activated
continuously
• Any additional non-disconnected signals associated with the new input are activated at
the evacuation rate
9.11 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 General Alarm Circuits, activation of the General Alarm button, or
expiration of the Auto General Alarm Timer.
If any of these alarm inputs occur when the panel is not already in alarm, the following occurs:
• The buzzer sounds steadily.
• If Fire Drill is active, it is canceled.
• The Common Alarm Indicator turns on.
• The Common Alarm, Auxiliary Alarm and all correlated relays activate if Auxiliary
Disconnect is not active.
• The Auto Signal Silence Timer, if configured, starts. For UL installations, disable the
auto signal silence timer.
• The Signal Silence Inhibit Timer, if configured, starts.
• All non-disconnected relays programmed to the input are activated provided that
Auxiliary Disconnect is not active.
If the alarm is a Second Stage alarm all connected strobe circuits are activated continuously,
all non-disconnected signal circuits are activated at the evacuation rate, and the GENERAL
ALARM LED is turned on.
If the alarm is a First Stage alarm, the following occurs:
• 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 (see 9.8 Indicating (Signal) Circuit Types on page 52).
• The Auto General Alarm Timer, if configured, starts.
• The AUTOMATIC ALARM SIGNAL CANCEL (Acknowledge) LED starts flashing if
programmed. See Table 14 on page 63.
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 SIGNAL SILENCE button or the Auto
Signal Silence Timer, Signals are resounded as they were before Signal Silence, the
SIGNAL SILENCE LED is turned off, and the Auto Signal Silence timer, if configured, is
restarted. For UL installations, disable the auto signal silence timer.
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