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IDx User´s Manual Exemys
The loop, unless under prohibitive conditions, should be rectangular. Shorter sides should follow
traffic flow. Longer sides must be separated at least 1 meter (3 feet).
Wire section must be 1.5 mm square (14/16 AWG) or above. The wire may be multi core with
silicon jacket.
Figure 5 – Loop construction
25 turns / meter (8 turns / feet)
100 m (330 feet) Maximum
Examples on loop size and number of turns:
Standard Loop
2m x 1m (6.5 x 3 feet), 3 turns
When installing two loops, of different detection modules, at close ranges you should choose
different working frequencies for each loop, to avoid interference. In any case, loops should be at
least two meters apart. When both loops are connected to the same IDx this restriction doesn’t
apply.
The loop is installed in a cut in pavement. The cuts should be wider than the diameter of the wire
used to form the loop; the depth should be N x wire’s di 20 mm (1/8 “) or deeper (where
N is the number loop’s of turns). Cutting the rectangle’s corners at a 45º angle helps avoid
curving the wire beyond the maximum curve-diameter.
Proper installation of the loop will result in optimal detection. If a loop fails, it can’t be repaired
due to the installation method.
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