NFS2-3030 Programming Manual — P/N 52545:A 11/29/2005 89
Abort Switches Releasing Applications
B.3.2 IRI Abort Switch
An IRI Abort Switch has a standard UL-type delay timer that complies with UL Standard 864,
operating like ULI but with additional functions for Cross Zones. Refer to “How Cross Zones
Work” on page 93 in this appendix for more information on cross zones.
When the first alarm occurs in a releasing zone programmed with a cross-zone code, pressing the
abort switch will prevent activation of the releasing zone should a second alarm occur while the
switch is held.
When the abort switch is released, if a second alarm has occurred while the switch was held, the
ten-second IRI timer activates immediately, and the control panel activates the releasing zone
outputs at the end of the IRI timer countdown.
When the abort switch is released and a second alarm has not occurred while the switch was held,
the panel waits for the cross-zone conditions to be met before activating the releasing zone.
Figure B.4 IRI Abort Switch
!
WARNING:
The IRI abort switch will only work if it is pushed before the second alarm occurs. If it is pushed after
the second alarm, the releasing zone will already have been activated, and the switch will have no
effect.
Delay Time: 15 seconds
Abort Switch: IRI
Cross Zone: Z
Soak Time: 0
Program selections for this releasing zone
Release the abort
switch; a 10-second
IRI timer begins
Press and hold
the Abort
Switch for 15
seconds
At the end of the 10
seconds, the
control panel
activates releasing
zone outputs
10 sec
Alarm 1
Alarm 2
(Cross-zone
conditions met)
Total time from when Abort Switch
is pressed to output activation:
15 + 10 = 25 seconds
Total time from when Abort Switch
is released to output activation: 10 seconds
Abort Switch held 15 sec.
0 sec 5 sec 10 sec 20 sec 30 sec
5 sec
5 sec
10 sec
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