NAPCO Gemini C-Series Control Panel Installation Instructions--Volume 2
Installation Instructions, Volume 2 Page 29
FIRE GLOSSARY
NAC
Notification Appliance Circuit
A circuit or path directly connected to a notification appliance. A notification appliance is any audible, tactile or visual signal--
or any combination thereof--employed to indicate a Fire, supervisory or trouble condition (such as bells, strobes and similar
appliances or parts). Up to 5 GEMC-NACXX devices may be placed on the 4 wire Fire bus. Each provide 7 programmable
outputs: Four 24V Regulated NAC circuits and 3 Form C relays.
Notification Appliance Circuits can serve one of five functions: Notification of a Fire Alarm, Notification of a Fire Supervisory ,
Notification of a Fire Trouble, Constant Auxiliary Power or Auxiliary Power that can be momentarily removed with RESET.
Each NAC can only perform one function, therefore NAC's that activate on fire alarm may not activate on Supervisory or Trou-
ble, NAC;'s that activate on Supervisory may not activate on Fire Alarm or trouble, NAC's that activate on trouble may not acti-
vate on Fire Alarm or Supervisory.
• NAC's that activate on Fire alarm may be programmed for all NAC features described in the glossary
except: Supplemental (when used for required Fire Alarm function), Reverse Polarity, or Fire Reset.
• NAC's that activate on Supervisory may not be wired to alarm notification appliances and cannot be pro-
grammed for NAC features Reverse Polarity, Fire Reset, Smart or Cadence Enable.
• NAC's that activate on Trouble may not be wired to alarm notification appliances and may not be pro-
grammed for the NAC features Silence-able, Reset-able, Supplementary, Reverse Polarity, Fire Reset,
Smart or Cadence Enable.
• NAC's that are used for Constant Auxiliary Power may not be wired to alarm notification appliances and
must be programmed for Reverse Polarity and no other NAC features.
• NAC's that are used for Auxiliary Power that can be momentarily removed with pressing RESET
may not be wired to alarm notification appliances and must be programmed with Reverse Polarity, Fire Re-
set and no other NAC features.
NAC Features
NAC/Output Assignments tab
Silenceable
When selected, output remains latched until a Fire keypad is unlocked (with a valid Fire code) and SILENCE is pressed
(turning off audible Fire alarm appliances). This output will "re-sound" if another Fire alarm zone initiates an alarm before all
Fire zones have reset. This feature is typically selected for audible Fire alarm sounding appliances.
Resetable
To turn off a NAC programmed for Resetable, enter a valid Fire code, then press ENTER to unlock the Fire system, then
press SILENCE to silence all silence-able outputs, then press RESET. If all Fire alarms restore within 30 seconds, the output
will turn off.
Supplemental
To turn off a NAC or other output programmed for Supplemental, enter a valid Fire code, then press ENTER to unlock the
Fire system, then scroll through the menu options and select "SUPPLEMENTAL OUTPUT RESET".
Fire outputs can be programmed as Supplemental outputs; these Supplemental outputs should not be used for any required
Fire system operation, but used for ancillary features such as remote alarm and/or trouble annunciators that are not used for
evacuation sounder or required strobes. To turn off these Supplemental outputs, the GEMC-FK1 Fire keypad must be
unlocked and the option "Turn off Supplemental Outputs" selected.
Reverse Polarity
When selected, the output is the opposite of the programmed state. If the output selected is programmed never to activate,
the output is always on; if programmed to activate on an event, the output is normally on until the event occurs, turning the
output off. The output remains off until the condition restores, then turns back on. Typically used in conjunction with the Fire
Reset feature to create a power output for latching 4-wire smoke detectors and similar devices that require power to be re-
moved for reset. May also be used on door latches that normally require power, thus power is removed on a "Fire Alarm"
event.
Fire Reset
When selected, pressing RESET on an unlocked GEMC-FK1 Fire keypad causes the selected output to change state (on to
off, off to on) for the time selected in "Fire Reset Duration". Typically used with Reverse Polarity to create a power output for
latching 4-wire smoke detectors and similar devices that require power to be removed for reset.
Smart
When selected, the output (only NAC A through NAC D, and GEMC-NACXX NAC outputs 01-40 [the first 4 outputs of each
NAC board] are supported) supplies power and a special format that allows Wheelock or System Sensor devices (only one
device type may be selected per system) to do the following:
1. Synchronize strobes;
2. Synchronize temporal audible sounders;
3. Silence audible sounders while still activating strobes;
Note: Program "Silence" on the selected output(s). For a list of System Sensor or Wheelock smart devices that are
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