Security System Flashcards
Security system
Let’s talk little bit about that normally open contacts so what we’re talking about our magnetic contacts that are used for doors or windows and we wouldn’t want to have them normally open and out of the alarm only if they closed because then someone would have to open the window just the right amount or open the door just the right amount so that they did to contacts Come into proximity to one another and the alarm is tripped so the answer is no probably open contacts we’re going to use centers with normally close contacts and other magnetic contacts for doors and windows and when the circuits in irrupt it ships the alarm so you have on the frame of the window you have a contact on the window you have a contact The alarm is set, the alarm several different types
Mechanical motion detectors: ways to figure out who is breaking in mechanical motion detectors. These are spring loaded sensors at windows doors.
Photoelectric devices:
Laser or infrared or beam of light
Not outdoor
Older one lights are visible
If it’s a laser, we can mirror them together and secure the perimeter of a place.
Passive infrared detector
Change in heat! Like when a person is in a place, their body temperate will make the sensor go off.
Motion detector:
Person should come toward or away from senator. Not side movement
Acoustic detector: toned to a range of some noises. Like breaking glass!!
Delayed egress locking system: shop lifters
