NE41 17030-02 v1.0
D-POS II
- Technical Handbook
neat
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Picture 14.
Placing two ferrite antennas on a door
8.3.2 Loop antenna
The loop antenna is a cable installed around a door, on the floor or in the ceiling. If
the area of the loop increases the field also increases. Below are two examples how
to install the loop antenna. Occasionally it is desirable to hide the control unit for
instance above the inner ceiling. If so, twist the cable all the way from the loop’s
beginning to the control unit. Twisting the cable diminishes the magnetic field to a
minimum in the twisted part.
The entire length of the loop antenna cable must not exceed 10 meters.
The loop antenna can be extended to 50 or 100 meters with the article LOOP.
8.3.3 Synchronization
It is possible to synchronize up to three D-POS units in order to avoid that they in-
terfere with each other. This is done by connecting GND (screw terminal 7) and SYNC
(screw terminal 8) on one unit to the corresponding screw terminals on the other
unit.
It is possible to synchronize both D-POS and D-POS II units.
Picture 15.
Loop antenna around a door frame
Picture 16.
Loop antenna on the floor
