INTRUSION&FIRE ALARM ADDRESSABLE 20-LOOP CONTROL DEVICE
24
Loop type
Alarm loop statuses
Loop trbl rst
Silent alarm (attack)
11
Alarming
from 2,2 to 5,4 k
О
h
м
less then 1,8 k
О
h
м
or more than
6,6 k
О
h
м
Status 1*
Status 2*
Status 3*
Status 4*
Status 5*
less then
R1
*
from R1
*
to R2
*
from R2
*
t
о
R3
*
from R3
*
t
о
R4
*
more than
R4
*
12
Auxiliary
Program-
mable
* - alarm loop statuses and threshold resistances
are programmable – see 5.4.2 section
4.1.2 Resolving
time
The resolving time is a time of device assuming the alarming status.
Short-life breakings of alarm loop, which are:
- less than 50 ms for burglary loops provided the “300 ms Integra-
tion” parameter is set off
- less than 250 ms for all other loops and burglary loops if the “300
ms Integration” parameter is set on
don’t cause the device transition to the alarm statuses.
The device transits into alarm statuses if the breaking period has ex-
ceeded:
- 70 ms for burglary loops provided the “300 ms Integration” pa-
rameter is set off
- 300 ms for and burglary loops and 12 loop type if the “300 ms In-
tegration” parameter is set on.
The resolving time for 1, 2, 3 loop types can be equal from 300 ms to
3 s depending on transient process specifity. If the detectors with large in-
ternal capacity are included into alarm loop the resolving time in case of
breaking changes in inverse proportion with the transient rate. The mini-
mum rate of loop voltage changing with the resolving time having reached
the maximum is 0,5 V/s.
4.1.3 The number of detectors to be connected
The device enables voltage supplying of 2-Wire burglary and fire de-
tectors via alarm loops.
The number of detectors to be included into single alarm loop is cal-
culated by formula
N = Im / I
,
where:
N
is the number of detectors
Im
is the maximum load current
