C-4
Software Point Type - The software point type assigned to each hardware
device in the system defines the software operation associated with that hardware
device. This was formerly referred to as “point type.” The software point type
assigned to each hardware device defines status reporting, including the default
point banner that is displayed, printed or logged upon point status changes. The
hardware device type defines allowable software point types. Examples of
software point types include Smoke Detector, Verified Smoke Detector and Heat
Detector. The system will respond differently to certain status changes
depending on the software point type assigned.
Style B - A method of connection for IDC that will provide a trouble indication in
the event of an open circuit on the wiring loop. Also known as Class B.
Style C/Style E - An IDC point type. A trouble indication is provided if a short
(+ to -) or open circuit condition exists on the wiring loop. An alarm is initiated if a
"current limited" state exists. Style C is two wire, Style E is 4 wire.
Style D - A method of connecting initiating devices on IDCs that provides multiple
signal paths so that circuit operation is maintained with a single open circuit
connection. A trouble indication is provided in the event of an open circuit on the
wiring loop. Also known as Class A.
Style Y - A method of connecting notification appliances on NACs that provides a
trouble indication in the event of an open circuit on the wiring loop. Also known as
Class B.
Style Z - A method of connecting notification appliances on NACs that provides
multiple signal paths so that circuit operation is maintained with a single open
circuit connection. A trouble indication is provided in the event of an open circuit
on the wiring loop. Also known as Class A.
Supervisory Signal - A signal indicating the need of action in connection with the
fire suppression system or equipment or with the maintenance features of related
systems. (See Fire/Supervisory point type.)
Temporal Code - A three pulse coding pattern adopted by NFPA as a standard
evacuation pattern for audible notification. The pattern consists of three 1/2-second
pulses, each pulse separated by 1/2-second silence. Each group of three pulses is
separated by 1.5 seconds of silence.
VSMOKE - A point type that is selectable for an IDC. This point type will initiate
an immediate alarm from a contact closure Pull Station or Heat Detector, but will
initiate the Alarm Verification sequence (see definition above) for a current limited
alarm. A point configured as VSMOKE must NOT have any devices other than
smoke detectors that initiate a current limited alarm.
Zone - A defined area within the protected premises. A zone may define an area
from which a signal can be received, an area to which a signal can be sent, or an
area in which a form of control can be executed.
Glossary (continued)
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