Pre-Signal - Siemens FC2005 Installation, Operation And Maintenance Manual

Pre-Signal

When an alarm causing device in a Pre-Signal input group is initiated, the alarm condition is
reported at the panel. Its associated NACs are not activated until the programmed
investigation delay has relapsed or 2
time (see figure below).
st
1 Alarm
Initiated
Audible ON
Audible OFF
nd
2
Initiated
Audible ON
Audible OFF
Pressing the reset button at anytime during the Pre-Signal sequence will initiate a reset
condition and restore the panel to stand-by state.
nd
Alarm is initiated anytime during the Pre-Signal delay
Pre-Signal Delay time
Alarm
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Panel
Reset
Figure A
Pre-Signal
Normal
Sequence
Figure B
nd
When 2
Alarm is
Initiated