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3 Magnetic loop
The loop must be implemented at least 150 mm from fixed metal objects, at least 500 mm from moving
metal objects and no more than 50 mm from the road surface.
1. Prepare a PVC cable duct or make a chase in the ground (avoid 45° corners to prevent breaking the cable).
2. Use a normal single-pole 1.5 mm² diameter cable. If the cable is buried directly, it must be double
insulated.
3. Preferably, induction loops are made square or rectangular.
4. Install the cable with the number of turns indicated in the table.
5. Twist the two ends of the cable from the loop to the E680S board at least 20 times per metre.
i
Avoid making joints in the cable but if it is necessary to do so, solder the conductors and seal the joint with heat shrink
tubing and keep it separate from mains power lines.
B680H
Twist at least 20 times per metre up to
connection with the board
18 Loop windings table
Loop perimeter
< 3 m
from 3 to 4 m
from 4 to 6 m
from 6 to 12 m
over 12 m
70
8 mm
N° of turns
6
5
4
3
2
732719 - Rev.E
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