Perimeter layout guidelines
Page 18
FlexZone Product Guide
Gate bypass
If there is a gate within a FlexZone sensor zone, you require a sufficient amount of inactive cable
to bypass the gate, even if the gate is protected by sensor cable. Secure the bypass cable and
bury it in PVC conduit. See
for an example of a bypassed gate, which uses a
microwave system to provide security across the gate.
Armored cable
Armored cable is FlexZone sensor cable encased in a flexible metallic conduit. The armor protects
the sensor cable from damage and vandalism, as well as from the sun and weather. Steel cable
ties or wire ties are the recommended fasteners for armored cable. Armored cable is available in
lengths of 150 m (492 ft.). Two lengths can be spliced together to create a 300 m (984 ft.) cable.
Armored cable splices are enclosed inside metal condulet fittings (p/n G6KT0300).
Double pass coverage
For FlexZone installations which require double passes of sensor cable, you use both cable sides
of a processor to provide software zoning and precise target location. To accomplish this the
processor is located at one end and the two sensor cable sides run parallel for up to 300 m along
the fence in an upper and lower cable pass. The ends of the two sensor cables are terminated or
spliced together. To enable precise target location, the detection start points of both cables must
match, and both cables must be of equal length and have identical features (e.g., service loops,
sensitivity loops, etc.). Each FlexZone processor can provide double pass coverage for up to
300 m of cable.
Note
Senstar recommends that both cables for a double pass installation be
laid out side by side on the ground beside the fence and marked with
tape at 5 m (16 ft.) intervals for the full length of the cable. This will help
ensure that the cables are properly length matched which is essential
for detection sensitivity and location accuracy in a double pass
installation
Figure 9: Single processor, double cable pass configuration
1/3 fence height
1/3 fence height
1/3 fence height
A side cable
B side cable
identical features
300 m
matching
start points
matching
end points
terminator
terminator
matching
meter marks
(every 5 m)