Chamberlain CSW200UL8, Owner'S Manual, Page: 26 / 52

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120 Vac “Center” Loop Detector: Allows gate to stay open when vehicles are
obstructing path. CAUTION: This option is for all vehicles including ones less
than 14 feet long. Center loop system requires two safety loops.
120 Vac “Safety” Loop Detector: Allows gate to stay open when vehicles are
obstructing path. CAUTION: Suggested for vehicles 14 feet or longer. If a vehicle
is shorter, a center loop system is recommended and should be installed.
If the “Inside” and “outside” safety loops are connected to the same loop
detector:
• They should be series connected to the detector.
• Have the same dimensions.
• Have the same number of wire turns. (See table below.)
120 Vac “Exit” Loop Detector: Allows gate to automatically open for exiting
vehicles.
See Accessories
The wire is continuously wound in
the loop saw cut for the required
number of turns. One turn shown
(refer to table).
Recommended Loop Wire XLPE 12-18 gauge
(Use heavier wire gauge for a more durable loop.)
Remove sharp inside corners
by making corner cuts.
The wire MUST be twisted together 6 twists per foot
from the end of the feeder slot to the loop detector.
Number of Wire Turns Needed for Loop Sizes
Road Surface
Sealant
Feeder Slot
Saw Cut
1/8" to 1/4" Width Saw Cut
2" to 2.5" Depth
Saw Cut
NOTE: Use
separate 120 Vac
power for each
loop detector.
Home Run
Backer Rod
Insulated loop wire
3 turns shown, amount varies.
Refer to table.
Contact your local dealer
for more information
about loop detectors.
NOTE: Wire mesh or reinforcement
imbedded in the road surface should be
cut away a minimum of 6 inches from
the perimeter of the loop.
Installing Insulated Loop Wire
Safety Loop
Exit Loop
Center Loop
WIRING
120 VAC EXTERNAL LOOP DETECTOR WIRING
Loop Perimeter Number of Wire Turns
10 feet to 13 feet 4
14 feet to 26 feet 3
27 feet to 80 feet 2
80 feet and up 1