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Device part
number
S2IP-ST-XR
S2IP-ST-XW
S3-SN-X
S3IP-SN-X
S2IP-SN-X
inc. suffi x -V2
S3-VP-X
S3IP-VP-X
S3-VP-ST-XR
S3IP-VP-ST-XR
S3-SN-ST-XR
S3IP-SN-ST-XR
inc. suffi x -V2
S3IP-SN-ST-XW
inc. suffi x -V2
S4-780
S4-720-ST-VO
S4-770
S4-711-VO
S4-711
S4-711-ST
S4-771
S4-711-ST-VO
S4-911-ST-VO
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
C
device count
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)
6
Description
Strobe Red
Strobe White
Sounder
Sounder with Speech
Sounder Speech with
red strobe
Sounder with red
Strobe
Sounder with white
Strobe
Heat Sensor, Sounder
& Speech
Heat Sensor, Speech
& Strobe
Optical Heat Sensor &
Sounder
Dual Optical + Heat
Sensor & Speech
Dual Optical Heat
Sensor
Dual Optical Heat
Sensor & Strobe
Dual Optical Heat
Sensor & Sounder
Dual
Optical Heat
Sensor, Speech &
Strobe
Dual Optical Heat
Sensor & CO Strobe
Sounder Speech
Maximum
No. of
limit
Devices
current (mA)
per loop
on loop
per device
100
______ x
4.00
40
______ x
10.0
200
______ x
2.00
88*
______ x
4.50*
55
______ x
7.00
40
______ x
10.0
65
______ x
6.10
45*
______ x
8.6*
35
______ x
11.4
28*
______ x
13.9*
120
______ x
3.30
65*
______ x
6.10
55
______ x
7.00
40*
______ x
10.0
150
______ x
2.60
75*
______ x
5.30
120
______ x
3.30
65*
______ x
6.10
200
______ x
0.20
100
______ x
4.00
150
______ x
2.60
75*
______ x
5.30
55
______ x
7.00
40*
______ x
10.0
55
______ x
7.00
40
______ x
10.0
A
Total Alarm Current
Alarm
Alarm
current
x
4188-1075 issue 3_Part 2_08/14
Loop Loading
B
and
.
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