How To Protect Areas And People - Urmet 1068 Série Mode D'emploi

2.3.3

How to protect areas and people

The purpose of an intrusion alarm system is to prevent some prowler from accessing the areas to be protected without
him noticing the system.
This means monitoring openings and places of passage, and can be achieved through 2 different technical solutions:

The "perimeter" protection, where detectors are installed in all the openings (entry doors, windows, skylights, and
glass doors) on the exterior of the areas to be protected. The detectors must cover the entire perimeter: even one
single, small, and seemingly insignificant opening that is not monitored represents a protection shortcoming and
makes it a potential point of entry for intruders.
The advantages of this solution are that the alarm is given as soon as someone attempts to enter and that it is
possible to arm the system even if there are people in the rooms.
The disadvantage is that if the intruder success in entering without setting off the alarm, it is no longer possible to
detect him and he may act without consequences.

The "trap" protection guarantees that the most important rooms and passages (like corridors and stairways, etc.)
are surveyed.
The advantage of this solution is that the intruder may not wander about undisturbed, in that sooner or later his
presence would be detected.
The disadvantages are that when his presence is detected, he has already entered and it is not possible to arm the
alarm system with people inside the rooms.
Perimeter
The best and most versatile protection is obtained, obviously, by using both technique.
Protecting the same room with more than one type of detector, when technically and economically possible, is a good
solution.
In particular situations, like a building surrounded by a garden, it is even possible to consider a form of "advanced"
protection, which realizes a border of protection at a distance from the environments to be protected, seeking to
anticipate potential intrusions as much as possible. A typical example are the detectors installed along the gates or the
perimeter walls of a garden or outdoor courtyard, but they might also be seismic detectors installed along a driveway
within the property.
The subdivision into zones
There are cases in which it is not necessary to install the alarm system everywhere or, examining the problem from
another point of view, there may be occasions in which it may be preferable to be able to move freely in certain areas
while leaving other protected.
In other words, being able to zone the existing system, without having to plan two independent ones. The purpose is
obviously to increase both security and convenience.
This result can be obtained by configuring the system in zones. The zones are logical, not physical, groups of detectors,
sirens, keypads, readers etc., each of which can be associated with more than one zone if desired. It is better the
remember that when the system is enables, the detectors are not activated, but rather the control panel is commanded to
consider the information received by them as attempted intrusion if they reflect specific parameters.
DS1068-017
Figure 1 - Perimeter and trap protection
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Trap
LBT20717