2
0
1
6
-1
1
16
Manual LC10-*
Commissioning
Interference from metal
Fixed metal constructions e.g. steel girders, drains, steel reinforcements are integrated in the
automatic compensation of the loop detector and do not affect the safe functioning except for a
reduced sensitivity.
Moveable metal constructions e.g. rolling doors and revolving doors must have a sufficiently
large distance to the loop (> 1 meter) to prevent triggering the loop detector when moving.
5.4
Influencing variables
Loop inductivity
The recommended number of windings is only dimensioned for a loop inductivity of approx.
200
µ
H. At this loop inductivity no significant reduction of sensitivity results from a connection
lead of up to 50 meters. For longer connection leads (up to max. 150 m) the loop inductivity
should be increased by increasing the number of windings.
Loop resistance
The total resistance of loop connection leads and contact resistances should not exceed 5
.
The cross section of the loop connection lead should be 1.5 mm
²
.
Steel reinforcements
Steel reinforcements in the floor reduce the loop sensitivity. With heavy reinforcements the loop
size should be adjusted optimally to the vehicle size (no large loops) in order to keep the loss of
sensitivity low.
Laying loops
The loops must be permanently laid in the floor to prevent malfunctioning due to mechanical
movement. Especially when laying between rail tracks a firm installation and the use of a stable
complete loop should be ensured.
Connecting loops in series
Connecting loops in series (e.g. opening loops on the inside and outside of gates) considerably
reduces the sensitivity (approx. 30 - 50 %). In such cases we recommend the use of the two-
channel loop detector LC10-2.
Insulation resistance
Insufficient insulation resistance of the loop to earth, to adjacent loops or of the windings to
each other can cause malfunctioning. When laying loops it must be ensured that the line
insulation is not damaged by sharp edges in the floor groove.
SD IND 2.1
SD IND 1.1
SD IND 1.1
SD IND 1.1
> 2 m
> 2 m
