Security and Fire Alarm Systems

1
Security and Fire Alarm Systems

• LEARNING OUTCOME 7B
• Describe 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

3
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

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Zone

• Multiple windows or doors zone
• Zone 1
• Dining room
• Living room
• Zone 2
• Master bedroom
• Zone 3
• Front door
• Back door

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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

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Zones

• Every circuit zone 1 device
• Room
• 2 door sensors
• 2 passive infrared receivers
• total of 4 security zones

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SubZones

• Another circuit
• 1 zone 1 circuit 1 device
• Another circuit connects to above circuit
• If subzone goes off
• Controller cant tell if zone or subzone or zone
  has triggered alert

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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

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Fire Systems

• Advance security systems
• Smoke detectors
• Carbon monoxide detectors
• Detects
• Fire
• Smoke
• Heat
• Components
• Fire alarms
• Smoke detectors
• Heat sensors

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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

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Smoke Detectors

• Power
• Batteries
• A year without changing
• If hear short beeps gt change batteries
• AC
• If power fails
• Alarm fails

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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

13
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

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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

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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

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Wireless Systems

• Easy to install and use
• Portable
• No wires
• Low installation cost

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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

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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

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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.

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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

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Questions Feel free to contact the creators of
this material

• Julian Carranza, jcarranza_at_dcccd.edu
• Mike Harsh, mharsh_at_ccccd.edu

This material is based upon work supported by the
National Science Foundation under Grant 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