
SIGNAL-20P DESIGN AND OPERATING PRINCIPLES
23
Loop type Alarm loop statuses
Loop trbl
short
(alarm loop
short
circuit)
Fire alarm
(actuation of
smoke
detector)
Loop trbl
rst
(loop has
been re-
stored after
any failure)
Fire
prealarm
(Actuation of
heat detec-
tor)
Loop trbl
open
(alarm
loop
open cir-
cuit)
2
Fire Com-
bined
less then
100 Оhм
from 150
Оhм to 1,8
kОhм
from 2,2 to
5,4 kОhм
from 6,6 to
14,4 kОhм
more
than 16
kОhм
Loop trbl
short
(alarm loop
short cir-
cuit)
Loop trbl rst
(Loop has
been restored
after any fail-
ure)
Fire
prealarm
(Actuation
of one heat
detector)
Fire alarm
(Actuation of
two or more
heat detec-
tors)
Loop trbl
open
(alarm
loop
open cir-
cuit)
3
Fire Heat
less 1,8
kОhм
from 2,2 to
5,4 kОhм
from 6,6 to
11 kОhм
from 12,5 to
22 kОhм
more
than
25 кОhм
Loop trbl rst Intrusion alarm
4
Burglary
from 2,2 to 10 kОhм less than 1,8 kОhм, or more than 12
kОhм, or more than 10 % hop off
Loop trbl
rst
Intrusion
alarm
Tamper alarm Loop trbl short
5
Burglary
with tam-
per check
from 2,2 to
5,4 кhОм
less than 1,8
kОhм, or
more than 6,6
kОhм
(in "Armed"
status)
from 6,6 kОhм to
9,0 kОhм or
more than 20
kОhм(in
"Armed", "Arm
delay" or "Arm
failed" statuses)
less than 100
Ohm
Aux zone restore Aux zone alarm
6
Auxiliary
from 2,2 to 5,4 kОhм less then 1,8 kОhм or more than 6,6
kОhм
Loop trbl rst Entry alarm
7
Entering
from 2,2 to 5,4 kОhм less then 1,8 kОhм or more than 6,6
kОhм, or more than 10 % hop off
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