NFS2-640 Operations P/N 52743:L4 06/10/19 65
Presignal and Positive Alarm Sequence (PAS) Operation Special Zone Operation
A.5.5 How to Respond to an Alarm with Presignal Delay Timer
(PAS selected)
If an alarm occurs with a Presignal Delay Timer (60-180 seconds) and PAS selected, the control
panel displays an Alarm screen that shows the type of device and the SLC address of the device
causing the alarm. When an alarm comes from an initiating device with a CBE list that includes F0
(with PAS selected), the control panel delays the following outputs:
• System Alarm relay
• TM-4 Polarity Reversal Alarm output
• TM-4 Municipal Box output
If a second alarm occurs during the Presignal Delay Timer, the control panel aborts the Presignal
Delay Timer and activates all programmed outputs.
A sample Alarm screen for a monitor module:
Figure A.10 Sample Alarm Display Screen
The
FIRE ALARM LED flashes and the panel sounder pulses a steady tone. The control panel latches
until the alarm is corrected and you press the S
YSTEM RESET key to reset the control panel. You
have 15 seconds to acknowledge the alarm or the control panel automatically activates all outputs
programmed to F0. If you acknowledge the alarm within 15 seconds, the control panel increases the
delay time to the full Presignal Delay Timer (60-180 seconds). You have the duration of the Presig-
nal Delay Timer to respond to the alarm before the control panel activates all outputs programmed
to F0. You can take the following actions:
• To increase the delay to the full programmed Presignal Delay Timer, press the
ACKNOWLEDGE/SCROLL DISPLAY key. The panel sounder goes silent and the FIRE ALARM LED
changes from flashing to steady.
• To abort the Presignal Delay Timer, press the
SYSTEM RESET key.
• To manually activate all outputs programmed to F0, press the
DRILL (Alarm Signal in Canadian
applications) key. The Manual Evacuate screen appears, the panel sounder pulses and the
FIRE
ALARM LED changes from flashing to steady. The Manual Evacuate screen and Alarm screen
display alternately at 3-second intervals.
If the Presignal Delay Timer reaches its programmed value, without operator intervention, the con-
trol panel activates all outputs programmed to F0.
NOTE: These outputs do not delay for Presignal operations without PAS selected.
Status banner ALARM
Type Code MONITOR
SLC address of the
activated initiating device
ALARM: MONITOR MODULE ADDR 1M147
Z004 10:14A 071415 1M147
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