FiberPatrol configurations
Page 18
FiberPatrol Site Planning & Installation Guide
Extended lead configuration
The extended lead configuration is a variation of the line configuration in which lead cable runs
from the sensor unit to one end of the perimeter. The detecting fibers S1 and S2 run the full length
of the perimeter from one end to the other. The extended lead configuration does not provide
single cut redundancy for the full length of the sensor cable. In the event of a cut or severely
damaged sensor cable, detection will continue between the start of the sensor zone, and the cut/
damaged point in the cable.
Figure 17 line configuration with start point splice
Figure 18 FiberPatrol extended lead configuration
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)
fusion splice
fiber optic termination
splice enclosure
splice enclosure
sensor unit
equipment
Note: Cable length = a + b
FiberPatrol sensor cable
fiber optic cable (sensor cable/lead cable)
Note:
S1 (sensor fiber 1 - internal to fiber optic cable)
S2 (sensor fiber 2 - internal to fiber optic cable)
fusion splice
fiber optic termination
splice enclosure
sensor unit
equipment
Cable length = a + b + c
dual end module
indicates software defined start of detection