Glossary
EST3X Technical Reference Manual 279
Short for modulator/demodulator. A communications device
that enables a computer to transmit information over a
standard telephone line. Sophisticated modems are also
capable of such functions as automatic dialing, answering, and
redialing in addition to transmitting and receiving. The
3-MODCOM includes a modem.
Notification appliance circuit. A circuit connected directly to
notification appliances. The electrical integrity of the circuit is
monitored by the fire alarm system.
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.
A system of hierarchy that allows or prevents setting or
resetting outputs. Output priorities range from low to high.
A number code used to set the configuration and operation of a
SIGA module. The personality code is either factory installed or
must be downloaded into SIGA modules for proper operation.
-limited Wiring and equipment that conforms with and is installed to the
National Electrical Code, Article 760, power-limited provisions.
A system that operates according to the provisions of
NFPA 72, Chapter 4-4.
An input or output point that is not a physical device. For
example, ground fault and communication fault notifications.
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 condition, not under the influence of a
response) or the reset condition. An output reset state contains
a priority level.
A list of outputs or functions that occur as a result of the
change of state of an input.
Refers to 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.
An electrical path that contains power or a signal that is used
by multiple outputs, zones, or circuits.
-232 A serial communications format normally used for serial
peripheral devices from a computer. RS-232 cables have a
maximum length of 50 ft (15.2M).
-485 A serial differential communications format used to
communicate between the panel and remote annunciators.
EST3 System Definition Utility program. Software that lets
programmers configure and program an EST3X control panel.
The relative percent obscuration of a detector.
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