6 Outdoor Self-Powered Siren
When the maximum alarm time of the higher priority alarm expires, or when the alarm conditions clear, the lower priority alarm
signal activates the loudspeaker and strobe/flash in accordance with its configuration.
If a priority alarm signal overrides an alarm that has been running for more than 30 seconds, the maximum alarm time of the inter-
rupted signal will run on.
If the priority alarm terminates (due to timeout or restoral) before the maximum alarm time of the interrupted signal expires, the latter
activates the loudspeaker and strobe/flash for the residual time.
If a priority alarm signal overrides an alarm that has been running for less than 30 seconds, the maximum alarm time of the inter-
rupted signal will freeze. If the interrupted alarm signal is still present when the priority alarm terminates (due to timeout or restoral),
it activates the loudspeaker and strobe/flash in accordance with its configuration. If the interrupted alarm signal has restored when
the priority alarm terminates (due to timeout or restoral), it activates the loudspeaker and strobe/flash for 30 seconds. Figure2
shows how the lower priority alarm signal A activates the horn and strobe/flash after the higher priority alarm (alarm signal +N)
has been executed.
Memory flashing will stop (after the maximum alarm-time) when all the signals, that triggered the alarm, restore to standby for 5
seconds (restoral time). Internal tamper restoral requires 40 seconds.
Figure 2 shows an example on how signalling devices (optical and acoustic) work for a particular activation sequence.
Figure 2 – Alarm priority: standard flashing; memory flashing.
+N
F
30 s
40 s
T Max.
AF
A
ON
AF +N AF A
AF +N AF AF
OFF
ON
OFF
ON
OFF
ON
OFF
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