6
In a
domesUc
envlronmoolthe
COncepl
or
a PART-sET
system
Is
very
Irnportanl
, 0 Ishighlydesirable that,duringthe nightthe
unoccupied
pariolthe
houseIs fully protected. but free
movenienlls
allowed
throoghout
\he occupiedaraa, lor
example
.lJpsta~
.
.
UndarIhls
Part-'sel
condUion
the StalrcaselHall
detector,
• ftned, becomesthaFinal
ExIt
Detectoronyour
routo
downstaJr.;.
UIstheraloraprogranvned
10
delay tha alarm by the
ExItJEntry
time
allowlnllyoutogo
downslalJs
and lum
off
the alarm.
.
NITE
ZONES
AND
DAY
MODE
The alarm system Is
normaUy
SET 10'proted \he premiseswhilst
they ara unoccupied, hlslollcally thiswas usually at
night.
Theralorethelerm NlTEhas
been
coined10desaibethiscondjUon.
However, sensors
sudl
as FIRE or PERSONAl.
An
ACK give
conUnuous
24
hour
protec1lon.
'
The
term DAY Is used10desctlbe the
condOlon
when
the
panel
Is '
unset.
VoIth
\he
24
hour
,
clrt:u
lts In operallon.
12
' 16
30
' . 144
6
8
15
72
Abacus6
Abacus
8
Abacus
15
AbacuS
72 ,
7
For normal
do
,mes~
c
and
smal co.trnerdal
emnronments
. live
types01detectorara In
common
use,
(1) Door
Contacts
A set 01magnetic
contacts
(swtldles)Inslalled
on
a
protected
door
(orawindow)
whldl will
signal
tolIle
Abacus
alarm panelWthe door
Is
opened
.
(2) Vlbrallon Deloctor
A small
securIIy device
lItted
to a
prolee:ted
door,
wtndoW
orwal to
signal 10the Abacus atarTTl panelIf alalge amounl of vibrationIs
detected
, such as an
IntrUder
lore:tng
a holethrough a door.
~)MovemenIO~~ons
For
example,
Passive
Infa
Red or PIR.
A
securty device
normally
fttted at
head
height v.lthln a room or
corridortodetect
the
prnsence
01enIntrudorwlthlnthe eras
covered
by the
detector.
SYSTEM
COMPONENTS
Foryour~
peace of
mind
endto
avoid
1ats8
elarms,UisImportant
that you ara lamillar wtth the variousoomponentsthat go to make
up
your
alanm
system.
logether
wUh
thO~
function andthe reason
lor thelocation
seleded
for
eadl
component
.
Awiderangeof detectors are
avallablolD
delecllhe
presence01an
IntruderInyour premises
or
atlemptlng
Iogaln
unauthorised
ecoess.
Thetype01detectOnl
selected
VoID
depend on the type 01
pnomises.
\he level of protection
raquinad,
the general envlionment
surrounding
the property end \he
budget
avallable. Your
atarrn
InslaDatlon
company will have
advised
you on the best type 01
prolae:tlon
lor your
particular
raqutraments.
ZONES
AND
SENSORS
Buld
1ngs
are divided InlO ZONES
Ydllch
are
monKorad
or guarded
by SENSORS, also
known
as
detectors
or
PIR's.
.Those are conneded
to
the
'COlltrol
Paner
(Abacus)
by wired
CIRCUITS. . , .
ThoAbacussystem alloWS lor
varying
amounts 01
zones,
see chari
below(AllAbacus
panels
suppDed
wtth
a minimum 01sbczones).
MODEL MaximUm
Number
MaxImum Number ·
01 01
Zones Delectlon,
Poln1s
I
i
I
. .-,
PART
,SETTING OR
GOING
TO
BED
BEllS
. STROBES
AND
DIGI'S
OR
DAC'S
Whalavartho alarmcondition, k Is communicated 10tho
Immediate
neighbourhood throughthe local audible 'BElL', this
could
alsobe
aslranor
VIsual
STROBE(flashIng
Ughl)
. .
k
can also be
lransml1led
Vlalelephone or Radio
(with
a
variety
01
devloas
Including
AB-NETs,lJIgfsorDac's)10the
A1ann
Company,
and
thrOugh
themtotheappropriate Emergency S&Mce
1.0
.
Polloa,
Ara andAmbulance.
Tho
primarypprposeoI,theexternal belland strobe
Ughi
Isto
attract
anenUOll
In tho event01an Intlllder entering or
attempllng
toenler
a
prolac:led
zone
whDe
set.
The
belVsIrobe un' Is
normally
mounted et a high level outside
the
pramlses at a
point
which
Is
easily
to,aR!
and seen by passers by. Thla extomal bel
lls1r_
housing
VoIlI,ln
etlec:t.
actasa dele
....
nl toburglary:since apotential
Intruder
cansee
Immediately
thaI
an
Intlllderalarm
systom
Isfltled.
, Since th" belllstrOOe
housing
Is nonnally locaIad at the lronl 01 a
premtses
(Inorderto attrad
aDenUon).
evidenceofan
alarm
system
may ootbe
VIslbIe
from\he back cK
the
pramlses.
Forthis •sason,UIsnormalpractiCe10 IIIone or mora
'Dummy'
bell
~
~
hou
sl
ng
'
s
around
the premises. ,
In certain
Circumstances,
several
'Dummy'
bell
housings
can
be
eftee:tlve
(pal1Jculal1y
on largepramlses).
Noise Abatemenl
JeglslaUon
delermlnesthat an atarm boll
shall
001
ring contl1uously lor mora than20
nnInulas
(maximum).
For this
reascn
. all
Intruder
alarm
bells
are programmed to
swKch
off
after"
preset
period
(up to 20 minutes). The strobe lightwill
however,
continue
tooperate
unUi
the
alarmsystem Is
raset
by
yoo,
the occupier.
, ,
....
~
...
,
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