4188-1075 issue 3_Part 2_08/14
6
Loop Loading
Device part
number
Description
V
AD POWER
Maximum
limit
per loop
No. of
Devices
on loop
Alarm
current (mA)
per device
Alarm
current
x
Selection of any one of these devices reverts Loop card to Standard Mode of operation.
S2IP-ST-XR
S2IP-ST-XW
Strobe Red
Strobe White
100
40
______ x
______ x
4.00
10.0
S3-SN-X
S3IP-SN-X
S2IP-SN-X
inc. suf
fi
x -V2
Sounder 200
88*
______ x
______ x
2.00
4.50*
S3-VP-X
S3IP-VP-X
Sounder with Speech
55
______ x 7.00
S3-VP-ST-XR
S3IP-VP-ST-XR
Sounder Speech with
red strobe
40
______ x 10.0
S3-SN-ST-XR
S3IP-SN-ST-XR
inc. suf
fi
x -V2
Sounder with red
Strobe
65
45*
______ x
______ x
6.10
8.6*
S3IP-SN-ST-XW
inc. suf
fi
x -V2
Sounder with white
Strobe
35
28*
______ x
______ x
11.4
13.9*
S4-780
Heat Sensor, Sounder
& Speech
120
65*
______ x
______ x
3.30
6.10
S4-720-ST-VO
Heat Sensor, Speech
& Strobe
55
40*
______ x
______ x
7.00
10.0
S4-770
Optical Heat Sensor &
Sounder
150
75*
______ x
______ x
2.60
5.30
S4-711-VO
Dual O Heat
Sensor & Speech
120
65*
______ x
______ x
3.30
6.10
S4-711
Dual Optical Heat
Sensor
200
______ x 0.20
S4-711-ST
Dual Optical Heat
Sensor & Strobe
100
______ x 4.00
S4-771
Dual Optical Heat
Sensor & Sounder
150
75*
______ x
______ x
2.60
5.30
S4-711-ST-VO
Dual
Optical Heat
Sensor, Speech &
Strobe
55
40*
______ x
______ x
7.00
10.0
S4-911-ST-VO
Dual Optical Heat
Sensor & CO Strobe
Sounder Speech
55
40
______ x
______ x
7.00
10.0
A
Total Alarm Current
Distributed Alarm load
Ensure the Total Alarm Current value calculated does not exceed the maximum total alarm current value shown below to achieve
2Km loop length when using 1.5mm² cable or 2.5Km loop length when using 2.5mm² cable, in both cases a maximum of 200
devices are allowed on a loop:
Maximum total alarm current of 400mA (standard mode) with non VAD and can have VAD devices too on the loop
Maximum total alarm current of 800mA (enhanced mode) with VAD only devices on the loop
Lumped Alarm Load
The Total Alarm Current value calculated above which must not exceed 400mA for Standard mode / 800mA for Enhanced mode
and the respective tables on the following pages must be used to determine allowable loop devices and loop cable length possible
for lumped alarm load.
Use the rounded up
total alarm current
value from
Table 1
in
Table 2
or 3 / 4 or 5
to trade between the loop cable length
B
and
device count
C
for lumped alarm device load, see sections:
‘Loop length and quantities for Standard mode with non VAD devices’ (400mA maximum alarm current)
.
and ‘Loop length and quantities for Enhance mode with VAD only devices’ (800mA maximum alarm current)
