Glossary
58 P/N 3102309-EN • REV 001 • ISS 18JUL19
otification control areas Grouped nodes installed throughout the premises that provide a structure for the
distributed audio system and are used to define the audio subsystem's coverage area.
A basic NCA has one or more command centers for controlling the operations of the
members of the NCA. In some installations multiple NCAs can be managed by one or
more central control stations.
ff-normal state The system enters the fire alarm, trouble, disabled, or test state. The LCD screen shows
event messages and system LEDs indicate off-normal statuses.
A signal generated by the system, based upon responses defined in the system
database, and sent to external field devices. Outputs are LEDs, and modules.
See device.
An input or output point that is not a physical device. For example, ground fault and
communication fault notifications.
A programming logic device that works in association with NCAs and command centers
to arbitrate demands for control of audio communications in the life safety system.
An active condition or command used to force an output to its OFF condition. An output’s
OFF state may be in the restored condition (normal) or reset condition.
A condition of an input, where the input is not active. It also refers to the condition of an
output where the output is not in its set or reset condition and does not have a priority
value associated with it.
See Request Grant Deny.
An electrical path that contains power or a signal that is used by multiple outputs, zones,
or circuits.
The wiring that connects devices to the fire alarm control unit.
An input activated by the time of day or day of the month.
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