FiberPatrol Site Planning & Installation Guide
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Site planning
FiberPatrol configurations
The recommended method for installing FiberPatrol sensor cable is to use the minimum number of
splices possible; i.e., run a single length of cable from the equipment room to the fence, and
continue for as far as site conditions will allow you to go. Use splices for the start module, the end
module, and at any site features where a continuous run of cable is impractical or impossible.
Loop configurations
The loop configuration provides single cable cut redundancy for a closed perimeter. The sensor
unit is located anywhere along the perimeter length with the start and end points of the detecting
sensor cables co-located in a splice enclosure. Non-detecting lead cable carries the signal from
the sensor unit to the start point of the detecting cable. The two sensing fibers S1 and S2 run in
different directions around the perimeter. In the event of a cut or severely damaged sensor cable,
detection will continue around the perimeter in both directions to the location of the damage. There
are two types of redundant loop configurations, fully closed and partially closed.
provides
a comparison of the two.
Figure 9 FiberPatrol example fully closed & partially closed configuration comparison
FiberPatrol sensor cable
perimeter fence
administration
administration
fully closed perimeter
partially closed perimeter