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FiberPatrol configurations
FiberPatrol Site Planning & Installation Guide
Page 19
The partially closed loop configuration uses a dual end module in the fiber connection module in
the equipment rack. This configuration uses two lead cables and the two sensing fibers (S1 and
S2) run in opposite directions around the perimeter. The partially closed loop provides single cut
redundancy. In the event of a cut or severely damaged sensor cable, detection will continue
around the perimeter in both directions to the point of the damage.
Split configuration
The split configuration provides extended length coverage by using each sensor fiber
independently. To get the maximum length coverage, the sensor unit is located near the mid-point
of the protected section of fence. Two sensor cables run in opposite directions along the fence with
each end module located up to 5 km (3.1 mi.) away from the sensor unit. One sensor fiber
provides detection in each direction with S1 running one way and S2 running the opposite way. A
splice enclosure is required on the fence at the start point to use one lead cable (see
).
Using two lead cables eliminates the requirement for a start point splice (see
Figure 13 FiberPatrol partially closed redundant loop configuration
Figure 14 FiberPatrol split configuration (1 lead cable)
FiberPatrol sensor cable
fiber optic cable (sensor cable/lead cable)
S1 (sensor fiber 1 - internal to fiber optic cable)
S2 (sensor fiber 2 - internal to fiber optic cable)
Note: Cable length = a + b + c + d + e + f + g
(min. possible required splices = 4)
fiber connection
module includes
dual end module
sensor unit
keyboard, monitor, mouse
fiber optic cable
S1
S2
fusion splice
fiber optic termination
splice enclosure
splice enclosure
sensor unit
Cable length = 2a + b + c
single end module
splice enclosure
single end module
fiber connection module
keyboard, monitor, mouse