Version: 1.0, September 19, 2002 1 – Introduction.
1 Introduction.
A high level of performance, security, reliability and convenience is required in various control and monitoring
systems. TRANSIT
is a long-range automatic identification system. The TRANSIT
reader communicates with
a broad range of tags in all environmental conditions.
TRANSIT
is based on proven microwave technology in the 2.45 GHz ISM band and allows identification of
tags at a distance up to 10 meters, even at high speeding passage. The NEDAP TRANSIT
system features radio
frequency identification equipment using modulated backscatter. In this method, the tags send there code to the
reader by modulating and reflecting the signal transmitted by the reader. To reduce the influence of unwanted
reflections, NEDAP applied circular polarization, which also allows orientation freedom of the tags.
TRANSIT
combines microwave identification and inductive identification in one unit. The system has the
possibility to identify vehicle and persons caring NEDAP XS-cards. For this purpose a small inductive antenna
can be connected to the reader. (Reflex-130) The combination of the small inductive antenna with TRANSIT
is
called the Gate-Master
function. Special firmware will be needed see par 3.1
TRANSIT
system has a wide range of tags for various applications. Lithium batteries energize the tag circuit,
which gives lifetimes up to 10 years. Heavy-duty tag is developed for vehicle applications. The Window-tags can
be mounted easily behind the windshield of a vehicle. The Booster-unit is a special Window-tag that can hold a
NEDAP inductive identification card. The booster reads this card after activation by the driver. The information
from the card is then transmitted to the microwave reader.
Combi-booster is a combination of the Window-tag and the Booster-unit, which makes the identification of
driver and vehicle possible. Pocket-tag is a microwave tag intended for the identification of people on large
distances.
1.1 Characteristics.
The TRANSIT
consists out of stainless steel housing, covered by a synthetic material cover. Removing the two
snake eye screws in the cover using a special tool can open this cover. After opening the unit the major
components of the system are becoming visible. In the cover the Transceiver-unit is located, on the bottom of
the stainless steel housing the Power-supply-unit is located. On the Power-supply-unit one of the optional
communication boards can be placed. The backside of the unit hosts three PG-adapters respectively two PG-9,
to be used for data communication cables, and one PG-13 adapter to be used for Mains connections.
PG-adapters
for mains and
data
© NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 4-41
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