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Operating Instructions
164 MS-9200UDLS PN 52750:E1 01/27/09
4.16 Synchronized NAC Operation
Synchronization is a panel feature that controls the activation of notification appliances
in such a way that all devices will turn on and off at exactly the same time. This is
particularly critical when activating strobes which must be synchronized to avoid
random activation and a potential hazard or confusion. The FACP can be programmed
to operate with a variety of manufacturer’s devices. NAC synchronization can only be
supported properly by the Remote Power Supply Sync Terminal, which follows NAC 1
programming.
Important: When a Notification Appliance Circuit with a mix of audible and visual
devices is programmed for silenceable and the synchronization feature is selected, only
the audible devices will be turned off if the Silence key is pressed. The visual devices
(strobes, etc.) will continue to operate.
4.17 Coded Operation
The NAC circuits resident on the control panel main circuit board can be programmed
for coded operation. The available pulse rates which can be programmed for coded
operation are as follows:
• Continuous: Steady output with no pulsing
• March Time: Pulses at 120 ppm (pulses per minute)
• Temporal Code: Pulses at ½ second On, ½ second Off, ½ second On, ½
second Off, ½ second On, 1½ second Off
• California Code: 10 seconds On, 5 seconds Off
• Two-Stage Pulses at 20 ppm (pulses per minute) for 3 or 5 minutes
(depending on
programming) and then changes to Temporal
4.18 Presignal
Presignal option programs an initiating device to delay the activation of NACs and/or
control modules while allowing visual verification by a person. Once a detector or
monitor module 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. In addition, Zone 98 will activate. This zone can be programmed to a
control module which may be used to activate a sounder or indicator which the installer
designates as a Presignal indication. Do not assign Zone 98 to a Notification Appliance
Circuit when using this zone to indicate a Pre-signal condition.
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 appropriate output
zones. 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 point
control points programmed to Zone 98 will activate
annunciators (if enabled) will sound the local piezo, and pulse the alarm LED
and zone LED
outputs (NACs and control modules) 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 does not affect monitor modules programmed as waterflow, supervisory,
process monitoring or remote switches. Presignal operation requires the approval of
the local Authority Having Jurisdiction.