EST EST3X - Page 290

Glossary
280 EST3X Technical Reference Manual
sequence
A series of actions separated by time delays.
service group
A collection of devices defined in the 3-SDU
that are configured
for testing as a group using the system test function.
signaling line cir
cuit The wiring that connects devices to the fire alarm control panel.
Signature
data loop The wiring that connects Signature Series devices to the fire
alarm control panel.
supervisory circuit
An IDC input circuit used to monitor the status of critical fire
protection equipment.
supervisory open (trouble)
A condition generated when a supervisory zone is open or in
ground fault, or when a Signature Series device is not
responding to a poll.
System definition utility
See SDU.
time control
An input activated by the time of day or day of the month.
verification
alarm Upon receipt of an alarm by a smoke detector, verified
detectors attempt to automatically reset. Receipt of a second
alarm within the 60-second confirmation period after the
automatic detector reset period is indicative of a verified alarm.
zone
A group of Signature Series detectors and modules defined in
the SDU that has a unique zone number and acts as a single
entity for programming purposes whenever any component of
the zone is activated