Presignal; Positive Alarm Sequence - Honeywell MS-5UD Series Manual

4.15 Presignal

Presignal option programs an initiating device to delay the activation of NACs while allowing
visual verification by a person. Once a detector triggers an alarm, the onboard piezo sounds
immediately, but the NACs are not activated for a user programmed time duration of up to three
minutes. Note that the alarm relay and communicator will respond to the initial alarm immediately.
After the programmed delay, the NACs will activate if the source of the alarm is not cleared. Note
that if a second alarm occurs during the programmed time delay, the alarm will be processed
immediately, causing activation of the NACs. The events which occur upon Presignal activation
are as follows:
onboard piezo sounds immediately
control panel LCD display will indicate a presignal event and the active zone
annunciators (if enabled) will sound the local piezo, and pulse the alarm LED and zone
LED
outputs (NACs) of associated zones will be inhibited from activating for a user
programmed time delay of up to three minutes
second alarm occurring anytime during the time delay will cause immediate activation of
all associated outputs
Presignal operation requires the approval of the local Authority Having Jurisdiction.

4.16 Positive Alarm Sequence

PAS (Positive Alarm Sequence) option will program a smoke detector to delay panel activation
(including alarm relay and communicator) for a period of 15 seconds.
When a detector triggers an alarm, the onboard piezo sounds immediately, but the NACs are
prevented from activating for 15 seconds. This inhibit time is factory set and cannot be changed.
Pressing the Alarm Silence or Acknowledge/Step key during the 15 second inhibit time will silence
the piezo sounder and start a timer which prevents activation of NACs for an additional time
duration which can be user programmed for up to three minutes. After the programmed delay, the
NACs will activate if the source of the alarm is not cleared. Note that if a second alarm occurs
during either time delay, the alarm will be processed immediately, causing activation of the NACs.
The events which occur upon PAS activation are as follows:
onboard piezo sounds immediately
control panel LCD display will indicate a PAS event and the active zone
annunciators (if enabled) will sound the local piezo, and pulse the alarm LED and zone
LED
outputs (NACs) of associated zones will be inhibited from activating for a factory set
duration of 15 seconds
pressing the Alarm Silence or Acknowledge/Step key will start a timer which inhibits
output activation for additional time delay of up to three minutes which is user
programmable
second alarm occurring anytime during either time delay will cause immediate activation
of all associated outputs
PAS operation requires the approval of the local Authority Having Jurisdiction.
MS-5UD/MS-10UD Series PN 52626:B 8/01/2008
Operating Instructions
115