DUE 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.

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

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, Mike Harsh, This material is based upon work supported by the National Science Foundation under Grant No 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