C-3
Listed - Equipment or materials included in a list published by an organization
acceptable to the "authority having jurisdiction" and concerned with product
evaluation, that maintains periodic inspection of production of listed equipment
or materials and whose listing states either that the equipment or material meets
appropriate standards or has been tested and found suitable for use in a specified
manner.
Logical State - The state of a point seen by the end user that is determined by point
type and physical state (alarm, trouble, etc.).
March Time Code - A notification code that consists of a 50% duty cycle pulse
train. The march time rate is specified in beats per minute (BPM). A 20 BPM
March Time code consists of 20 on/off cycles in one minute.
Municipal Master Box - An initiating device intended to send an alarm condition
to the public fire service communications center.
N2 COMMS - The communications protocol used by the 4010 to communicate
from the CPU to “slaves” in the system.
Notification Appliance - A fire alarm system component such as a bell, horn,
strobe, etc., which provides an audible or visible output, or both.
Notification Appliance Circuit (NAC) - A circuit or path directly connected to
one or more notification appliances.
Open Circuit State (IDC) - An open circuit is defined as the absence of the end of
line resistor, with or without a detector load.
Physical State - The control panels representation of the electrical state of a circuit
or device (open, short, etc.).
Point Type - See Software Point Type.
Protected Premises - The physical location protected by a fire alarm system.
Remote Master Box - An initiating device intended to send alarm, supervisory
and trouble signals to a remote location at which appropriate action is taken.
Smoke Detector - A device that detects visible or invisible particles of
combustion.
Continued on next page
Glossary (continued)
Glossar
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