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Security and Fire Alarm Systems

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. Home Security Intrusion detection Fire detection

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Security and Fire Alarm Systems

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  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.

  2. 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

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

  5. 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

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

  7. 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

  8. 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

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

  10. 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

  11. Smoke Detectors • Power • Batteries • A year without changing • If hear short beeps > change batteries • AC • If power fails • Alarm fails

  12. 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

  14. 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

  15. 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

  16. Wireless Systems • Easy to install and use • Portable • No wires • Low installation cost

  17. 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

  18. 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

  19. 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.

  20. 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

  21. Questions: Feel free to contact the creators of this material • Julian Carranza, jcarranza@dcccd.edu • Mike Harsh, mharsh@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

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