27
1. Determine proper location and size of each loop. Chalk out
loops on the driveway:
•
Loops should be 4 - 5 feet back from the gate path. Loops any
closer may be cause false activation when the gate passes by.
•
Determine the size of the loop. Make the loop large enough so a
vehicle must pass over the loop. The average loop is 4’ x 8’. Con-
sider the detection height.
•
Determine the detection height. The typical sensing height is 2/3 of
the shortest leg. (Example: a 4’ x 8’ loop typically has a detection
height of 2 1/2 feet.) To increase the detection height, increase the
loop size.
2. Cut loop slots in the driveway:
•
Loop slot should be 1 1/2” to 2” deep.
•
Loop slot should be 1/4” wide.
•
Cut diagonal corner slots to protect the wire insulation and keep
the wire from changing directions quickly.
3. Install loop wire:
•
Recommended Wire: 14 AGW to 18 AGW Stranded XLPE.
•
Starting at the gate operator, install the loop wire into the lead and
loop slots. Use one continuous run of wire for the loop.
•
Install the appropriate number of turns as determined by total loop
square footage. (Use attached chart)
•
Twist lead wires at least 6 turns per foot from the loop to the loop
input. (Hint: Pull the lead wires tight from the corner of the loop
and twist using a power drill.)
•
Route the lead wires to the edge of the driveway and into rigid
conduit under ground. Seal this joint to protect the wires.
•
Press the loop wire to the bottom of the loop slot. Use Backer Rod
(foam rubber) to protect and keep the loop wires from rising when
the sealant is poured.
•
Seal the loop slots with a sealant. Make sure the sealant is able to
sink to the bottom of the loop slot and completely encase the loop
wire. The wire should not move when the sealant has set.
R
EVERS
E
L
OO
P
R
EVERS
E
L
OO
P
O
PE
N
L
OO
P
4-5 Feet
4-5 Feet
Lead wires must be
twisted 6 twist/foot
until connected to the
loop input. If
possible, twist lead
wires from the edge
of the loop.
Typical
Loop
Diagonal
Corner Cuts
2”
Typical
}
Loop Wires: 3 Turns
1/4” Saw Slot
Sealant: 3/4” to 1” Min.
Backer Rod
Loop Size
(Sq. Feet)
Number
Of Turns
6’ to 12’
6
13’ to 20’
5
21’ to 60’
4
61’ to 240’
3
241’ & Up
2
Basic loop layout
The following diagram shows a typical slide gate application for two-way traffic or exit traffic. For one-way entry traffic, the exit loop
is not needed. (This diagram is a basic loop layout and does not show safety devices, pedestrian gate, fencing, etc. Refer to “IM-
PORTANT SAFETY INFORMATION” for gate details.)
LOOP & LOOP DETECTOR
Loop Installation Guidelines
Proper loop installation is a critical aspect of any gate application. An improperly installed loop may operate intermittently caus-
ing false triggers, holding the gate open, or allowing the gate to close on traffic. The following guidelines should be followed when
installing loops:
Summary of Contents for FSL700
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