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MP500/4N-8-16 Installation
2.3.4 The complementary devices
The complementary devices complete the alarm system by adding functions and simplifying its use.
The main complementary devices are:
2.3.4.1
Keypad
The keypad is a device with multiple functions, including:
authenticating the users on several levels;
totally or partially arming and disarming the alarm system;
signalling alarms saved and potential malfunctions;
activating alarms;
programming the alarm system;
enabling and disabling functions.
The keypad has the advantage, compared to other systems used to arm and disarm the alarm system, of separating the physical
objects that acts (the keypad) from the enabling to do it (the authentication code that the user memorizes), contributing to a higher level
of security. Some keypads have other functions, like the possibility to conduct ambient listening or establish a remote vocal
communication.
Not all the keypads are separate objects. In some cases, the keypad is an integral part of the control panel.
2.3.4.2
Reader
The readers are devices for totally or partially arming and disarming the alarm system. They are typically located outside of the zone
protected by the system. The reader has LEDs to signal the system status (armed/disarmed) and potential alarms or anomalies
present. The two most common types of readers are those with electronic keys and a transponder. With the first, a device with surface
contacts that resembles a key (hence the name) is introduced into the reader. With the second, a proximity key is put near the reader.
In both cases the reader reads a code that, if recognised, enables the system status to be changed.
They are easier to use than a keypad, but the electronic and proximity keys should be stored carefully and kept separate from the other
security keys (it is the same time of precaution taken with a debit card and its PIN).
2.3.4.3
Remote control
The remote control is a radio device that allows the arming and disarming of the alarm system from a distance. The latest mod els have
the possibility to personalise the use of some keys, for example to activate or deactivate a commandable output. For this type of
device, the warnings indicated for the reader are also valid.
2.3.4.4
Power supply
The power supply is used to provide electricity to the system devices, drawing it from the electrical network and transforming it into low
voltage.
The supplementary power supplies are used when those already present, like the one of the control panel, are not capable of
distributing all the electricity necessary or when, due to long connection wires, the correct voltage may not be reaching the remote
device.
The more advanced power supplies make it possible to also connect a local back-up battery.
More detailed information on how the alarm system is powered can be found in
2.3.4.5
Expansion
The generic term of expansion is used to identify an entire series of devices that can increase the dimension of the system o r add new
functions or capacities to it.
2.4
OTHER DEVICES THAT CAN BE INTEGRATED INTO THE ALARM SYSTEM
An alarm system can integrate other devices that offer functions other than those linked to intrusion.
The control panel must deal with this integration as it must be able to interface and manage these devices. Not all control units are
capable of doing so. If you intend to add one of these devices, during the creation of the system or as a future upgrade, it is necessary
to verify if the control panel to be purchased will be compatible with these devices.
These are some of the devices that could be integrated, but is not considered an exhaustive list:
detectors links to general security, or those capable of signalling potential flooding, gas links, fumes, etc.
In this case existing signalling systems (sirens, communicators) to notify alarms can be used;
automations, like a gate opener;
medals, buttons, or other devices to generate an “emergency response signal”;
programmable thermostats and other domotic devices (an interface may be necessary);
video surveillance system. In this case, if the camera or the device that manages it are capable of automatically recognising
potential movements in the zone being filmed, if necessary it would be possible to use the signal generated as an indication of an
attempted intrusion, which must be managed by the alarm system.
IMPORTANT!
Many of these devices enhance the functions of the alarm system, but are not economic alternatives to systems
dedicated and in compliance with current laws. If a certified solution is necessary, for example in the case of emergency
response systems or fire alarms, using the intrusion alarm system may not be the best decisions.
