Site survey
Page 28
FiberPatrol Site Planning & Installation Guide
from the gate to prevent the transmission of vibrations into the adjacent zones when the gate is in
use. The SMS software should be configured to mask alarms from the gate zone when the gate is
in use (zone accessed/bypassed).
Determining cable length requirements for gates
1.
For each gate panel:
•
The sensor cable passes around the circumference of each gate panel at ¼ the gate
height, 30 cm in from the outside edge, and ¾ the gate height.
length of cable to protect a gate = 2 X (gate length - 30 cm) + gate 2 X (distance
from inside edge of gate to fence post) + (fence height - 60 cm, for sensitivity loop) + 10 m
service loop (per gate)
2.
To reach the other side of a gate:
•
Create a sensitivity loop beside the fence post adjacent to the gate. Run the sensitivity
loop up to 30 cm from the top of the fence and back down the post to pass through the
split conduit. Loop the cable around the gate as described in step 1. Pull the cable through
the conduit to the other side of the gate. The conduit should be buried at a depth of 30 cm,
and the ends should extend at least 30 cm above ground level. Seal both ends of the
conduit (water tight) for areas which experience periods of freezing temperatures.
3.
To isolate the gate zone for access/secure operation:
•
Add the length of the cable required to cover the two adjacent fence panels on each side
of the gate) plus two 13 m (43 ft.) isolation loops plus length of cable to reach the buried
vaults (if used).
Using the cable management kit at the hinged side of protected swinging gates
A cable management kit (p/n FPKT0500) is used at swinging gate locations to protect the sensor
cable from being caught or pinched by the gate while allowing the cable to rotate freely when the
gate is opening and closing. The cable management kit includes a 1 m length of split conduit, two
1.15 m pieces of split loom and two gear clamps. The split conduit is fitted against the fence post
Figure 27 Independent gate zone
Figure 28 Independent gate zone (with buried isolation loops)
conduit
cable management kit
gate protection
sensitivity loop
13 m isolation loop
13 m isolation loop
10 m service loop
NOT TO SCALE
(FPKT0500)
conduit
cable management kit
gate protection
sensitivity loop
13 m isolation loop
13 m isolation loop
10 m service loop
(FPKT0500)
NOT TO SCALE
