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INSTALLATION
r INSTRUCTIONS
,
No.
1878
I
PASSIVE INFRARED
MOTION DETECTOR
GENERAL INFORMATION
The NO 1878 PIR proties
12 zones 01 *r&e-angk coverage wh a range
01 up lo 00 leel (rZ2m).
01 long tangercunam covecage wlh a range Of
w to 80 lee1 (24.4m) and has the lolbwmg lmponanl leatures:
- that
eemem pyrwkcfrs
sensor prowdmg Ihe rekafnbfy 01 two
cowetely
separate dual deleclors covermg Ihe same area.
* Mgcl wxwon.
computer desfgnee parabobc optcal system.
- Lowcuwnl
dram Ww31 allows lor erteneed system power source Ballery
Ye.
*
Wmzcroalfy
aejusiabk
optcal system tor.accumfe oaning of owmcbm
panern.
* &km SPOT reky.
- Wall comet mountmg plate.
* Duaknannel
signal pmcessmg Ior enhanced immumty to environmental
0swbances
wck~ced fake afarms).
- 12VDC overanon
The No. 1878 must be powered lrom a ldered 12VDC wurce thaw can
pmnde 81 feast 4 hours of standby power.
The oeector IS destgned IO operate al all bmes. The LED on the unr~ will
bghl whenever moftm ts ckfecmd tunkss masked).
PRINCIPLES OF OPERATION
The 000cal system dii
the area into a serks of paecled
zones. A
wadekmemsensormeas~esihe
kveloflnlraredenafgyineachzone.
When an mnmeer crosses or enters any zone. a sgnal mll be genenmd
tn resporse to We change m mlrared mgy.
The Ueteclof 0 Conligufed web an abemate polarity QUadekmeftl sensu
and
Iwo meewnaeni sgnal omcessmg l
mpktcars. In elkct. two passwe
mnfrared sensms share a commonopllcsl
sy-slem. Bolhsensors musl&lM
mofum a1 the same time lor the PIR 80 repon an akfm. In thu way. wnmunhy
is proded
agawl
lake alarms allflbuled lo channel noise. randan
detemfx dluuCmces.
and power ruppfy bn lranwus.
tik
'cauh'
cerconnencc is not comommised
COVERAGE CONSIDERATIONS
AND TVPICAL LAYOUTS
The range ~111 dfwend upon the mlrrof system muse. Prow&e
pallems
aresMwnmOiagrams1
and2loranormalmounlmg~of7h(2.lm).
Theammaybemoumecl
hghatloftnctease0rangebufm0udfgab0ve
8.5 h (2 6mj 1s noi recommdee
'DeadZone"
Caution:
Nme m Dlagcam 1 lhal a -dead zone'isindicaM.
wrthm~apersonc~~~~a~~~~~~~~ol~
un~i's pmecwe
zones. Other dead zones may occur between the&IeUof
~theeowmvare
f8elesol wew as meuml's mountmg heqhl ismcre8sed.
TOPVIEW
10'
40'
80'
(3.0m)
(12.2ml
(24.4m)
1~
2.3'
(0.7m)
(24.4ml
Diagram 2: LONG RANGEXURTAIN
MIRROR COVERAGE
Sektiing
a
Mounting
Location:
The NO. 1878 Passwe tnlrared Dekclor
responds 10 changes in enemy
wh;m0ccu~rrhenanmltubermOvesmlo~#olapr0le*ivercns.Bm
awrage
wll be oMamed tl the mountmg site is se!eCWd such that the
kkely earemon 01 mlruder mooon 6 ACROSS the oaftern.
Passwe I.R. umls ace remarkably reststan to false alarm hazards. bulchc
lolbmmg tecummendattons
should be &sewed:
Install tha dekuof
at a heiihl ol
eppfomna~ely 7 feel tram tloor. Do noI
mount on an unstabk
smfaw.
IMPORTANTz Avoid running akern, *riring
ckaemheavydutyeld*MIpomwbks.
-.
lz!a
0
x
Donotinstallwhere~deteclorisexpoaed
lo direcl wnlghl
or dlm!cIly above sooq
sowces of heat.
Avoidiocalingaurtilinareas~CQOlin
obpmsbke-fylopoduceampidchmge~
wmoeratwe.
wch as central heating.
radialorsDrduns(a~at~sduryLnd).
or cadiiin.
open flame. etc.
Makeumethedetecamareadoesnmtuwe
obsiruclkns
&uflams. aweens. kqe
pkWSOffumiture.pklllS.elC.)~~
uochthePnnemdoouarage.
INSTALLATION
A. Changing
From Wide Angle to Long Range Coverage:
Remweiron~wwrtfydeningafiaewdfiverbb3demlhegroow
between cover and ease at on 01 the locations shown in Dbsg. 3.
cmatmg bkbe to mmide
snap Iii. and then lihii
covef On.
Spread emer of both ofastii mugs
hoWg
the wick anda w ff
(12.2m)) mm
and mmove Ihe fnirm Oag.
4).
~onerideotlhc~nnge~EDn(24.4m))minOr~aprWlO
andansp~morhersideun6etthe~prong.Mahewretha(Ihc
~noc~~e~rC)rinthaircomecrartsandafehcld~
UMermepmlgs.
NOTE: Mmm suflace Mloule be free 01 din. weign
fnatkf and
kgefphm
0
1 INSERT
AT LOCATION
a.
b or
c AND TWIST
D-ram
j: COVER REMOVAL
2
";pEj
r-ox .*.I
30
'0
* 1-n n I-8 Il? 2-u
Diagram 1: WIDE ANGLE
PAOTECTlON
PATTERN
1
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