Chapter 14 Flashcards
where are some locations you could expect to see emergency call systems
in public areas both indoors and outdoors:
parks, elevators, parking garages…..
*how far must intercom be from sources of EMI
18 inches
*what are two types of resi intercoms
indoor and outdoor
*door control uses a push button to control a _____
to release of a locking door
remote relay
substation
can only communicate with the master station
what are the two types of substations for residential intercoms
indoor substations
outdoor substations - vandal resistant
describe station
remote communicating device connected to a control unit
describe control unit
control stations connected to it and creates communications path between stations
describe the two basic types of nurse call systems
visual - light up at master station
audio visual - lights and sound
how is cabling selected for nurse call systems
follow manufacture wiring instructions
when installing a room station you must stay 18 inches away from what items
EMI -dimmers -florescent lighting -high voltage -security telephone
how is wiring for an intercom substation selected
manufacture specific wiring. cables are selected based on system requirements
describe the differences between loop and star wiring configurations
loop is a daisy chain configuration unlike star which is individually run
what is the purpose of an area of refuge
allows a handicap person to communicate and be located by rescuer workers so they don’t have to risk the stairs in an emergency situation
can you use the same rough in bracket for master station as a substation
no
*what are the wiring requirements for nurse call
check manufacture instruction
*three types of wiring methods for intercom
star
loop
Bus
describe master station
able to communicate with other master stations and substations
what are 4 intercom components
control unit
station
master station
substation
where are some locations where a high power intercom would be necessary
in high noise areas: factory, manufacturing, ….
Door control uses a push button to control a ______ to release a locking door.
remote relay
what features do bathroom emergency stations have that other emergency stations do not.
longer pull string - 4 inches from floor
how is the operation of a telephone entry system that does not require a telephone line different from one that does?
uses relays instead of the telephone line
what are 3 additional features residential intercom systems can offer?
music
video camera
door release
how do commercial master stations differ from residential master stations
commercial have more than one master station on the system and the master stations can communicate with each other
what wiring is required for a telephone entry system?
depends on manufacture specification and application of device
