Single Stage Operation; Two Stage Operation - Mircom FLeXNet FX-MNS-6000 Installation And Operation Manual

13.3

Single Stage Operation

In a single stage system, all alarm inputs are treated in a similar manner. Alarm inputs include
any of the following: non-verified alarm, verified alarm, sprinkler alarm, water-flow alarm, and
general alarm circuits. 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 NACs programmed to the input are activated provided that Aux
disconnect is not active
• Non-disconnected strobes associated with the input are activated
• Non-disconnected signals associated with the input are activated at the evacuation rate
Subsequent alarms when the panel is already in alarm, cause the following:
• The alert buzzer sounds steadily
• 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
13.4

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 indicating programmed to the input are activated provided that
Aux disconnect is not active.
If the alarm is a second stage alarm,
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Indicators, Controls, and Operation