Security and Fire Alarm Systems

www.convergencetechnologycenter.org DUE 402356

Security and Fire Alarm Systems

LEARNING OUTCOME 7BDescribe design overview and location considerations for home security and fire alarm systems. Outcome addresses learning outcomes 1-4 for these specific technologies.

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Home Security

Home Security Intrusion detection Fire detection Smoke detection

Installation New Retrofit

Options Wired Wireless


Zones

Just like audio/video zones Security System zones

Location of sensors Important

How zones are setup Door sensors Window sensors

Zones important Multiple security zones Keeps track of alarms


Zone

Multiple windows or doors = zone Zone 1

Dining room Living room

Zone 2 Master bedroom

Zone 3 Front door Back door


Zones

Zones transfer info to controllers Status

Power Line failures Telephone system problems System tampering Low batteries

Type Wired Wireless

Difference is how signal is transmitted


Zones

Every circuit = zone = 1 device Room

2 door sensors 2 passive infrared receivers

= total of 4 security zones


SubZones

Another circuit 1 zone = 1 circuit = 1 device

Another circuit connects to above circuit If subzone goes off

Controller can’t tell if zone or subzone or zone has triggered alert


NC and NO

Configuration of systems NC

Normally closed System is armed Open NC area and alarm gets triggered

NO Normally open

Area is open If NO closes then it triggers alarm


Fire Systems

Advance security systems Smoke detectors Carbon monoxide detectors

Detects Fire Smoke Heat

Components Fire alarms Smoke detectors Heat sensors


Smoke Detectors

2 Types Ionization chamber detector

Produces molecules charged with electricity Smoke attach to ions Electrical current stops

Triggers alarm Photoelectric Chamber

Light Source Light sensitive receiver Alarm

Light cannot get in Smoke can get in Smoke scatters light inside Scatter light produces more light

Triggers alarm


Smoke Detectors

Power Batteries

A year without changing If hear short beeps > change batteries

AC If power fails

Alarm fails


Heat Detectors

Uses metal Metal units when heat enters air around it Alarm goes off

For Configuration check local codes or National electrical code. For installation check manufacturers website


Video surveillance

In house CCTV

Closed circuit Television Set cameras in different parts of house Video available to specific channel Video can be recorded

Tape VCR PVR

Internet Connect to house and view image Image sent to e-mail


Monitoring

Monitor environment Video surveillance Lighting for security

Use sensors Photo cells

Turn lights on evening Not enough light is received so it turns lights

Motion detectors Movement received

Triggers video recording Or turn lights on or flood lights


Wired Systems

Low voltage telecommunications Connects to main alarm

Doors Windows Sensors

Features Reliability

Can run with batteries Efficiency

Alarms is always connected to central system It works

Wired systems have always been used Availability

Many manufacturers make them


Wireless Systems

Easy to install and use Portable No wires Low installation cost


Remote Access

Manage system from anywhere Secure security system

Not too much integration with home network No one else can connect to it

Internet Web browser

Login and change system configuration Connects to home network Access cameras

Which system to use or buy? Not all systems allow connection from Internet


Components

Security control Panel Center of security Interface with home network is important Controls everything

Sensors Keypads Working Devices

Security Cameras CCTV Important factors

Resolution Sensitivity

Monitor and Switches Switches used with multiple cameras Changes picture from one camera to another


Components

Keypads Interface with security system Arm/disarm system Change state of system Zone that has triggered alarm appears in keypad

# number = 22 = zone 22 etc.


Sensors

2 common sensors PIR

Passive Infrared Sensors (Motion sensors) Smoke detectors

Types Contact sensors Glass break sensors

Detects sounds Motion sensor Flood sensor

In basements Carbon monoxide - CO


Questions: Feel free to contact the creators of this material

Julian Carranza, [email protected] Mike Harsh, [email protected]

This material is based upon work supported by the National Science Foundation underGrant No. 0402356. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation

Security and Fire Alarm Systems

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