SENSTAR FiberPatrol FP1150 Series, Руководство по эксплуатации продукта

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Fences
Page 32 FiberPatrol FP1150 Product Guide
Isolation loops (optional)
Isolation loops can be used at the start point of detecting cable, on both sides of gates that will be
setup as independent zones, at cable bypasses and at zone boundaries. Isolation loops use
approximately 13 m (43 ft.) of sensor cable coiled into 60 cm (2 ft.) diameter loops (7 loops) to
provide a distinct zone demarcation point. Isolation loops can be buried in cable vaults, which will
provide the greatest level of isolation between two zones. However, if using a buried vault is
impractical, isolation loops can be attached directly to the fence fabric with 14 in. steel cable ties.
Figure 34 shows a cross section of a fence-mounted isolation loop attachment and Figure 28
shows the buried vault installation method for isolation loops. Isolation loops are attached to the
fence in the same manner as service loops (see
Figure 33 ).
Transition loops
A 30 m (100 ft.) transition loop is recommended as a buffer between different installation types.
For example, at the transition between fence mounted sensor cable and buried cable. A 30 m
transition loop is typically comprised of 15 circular loops of cable with a 60 cm (2 ft.) diameter.
Ideally, transition loops can be installed in buried vaults. Otherwise, transition loops should be
securely attached to the lower section of the fence beside a fence post.
Figure 33 Service loop
Figure 34 Isolation loop (fence-mounted)
service loop 5 loops
10 m (33 ft.)
60 cm
(2 ft.)
of sensor cable
fence wire
7 loops 60 cm (2 ft.) diameter
isolation loop cross section
app. 13 m (43 ft.) of sensor cable
14 in. steel cable tie