Device Loop Circuits - Honeywell Gent Vigilon Installation Instructions Manual

Device loop circuits

Device loop circuits
Each loop circuit can each accept the connection of addressable devices / outstations,
up to 200 maximum per circuit. To maintain earth continuity on a loop, the loop cable
screen must be continued through each system device, whether the earth is connected
to a device or not.
A loop circuit must not cover more than 10,000m
protected site.
A spur circuit must always be taken from the "line common"
terminals of a 3 ways device.
A spur must not cover more than the equivalent of one zone as
defi ned in BS 5839 Part 1.
As every loop device has an isolator fi tted, it is not necessary
to apply special attention where there are more than 32 devices.
However no more than a maximum of 512 fi re detectors and/or
manual call points shall be installed on one control panel.
3
S device
(2-way)
Earth to
metal box
S-Quad
C3
IN4
OUT5
S-Quad
C3
IN4
OUT5
PANEL
28
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LOOP CIRCUIT 1
Terminal Card
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of fl oor area of a
2
Manual call point
L2
02
L1
01
3
S device
(2-way)
L1 0V L2 0V
LOOP n