IT2200 Reader System with Multimode Capability Installation & Maintenance/Service Guide
3-4
component. The reader broadcasts RF energy over an adjustable area called the read
zone or reader footprint. The tag on the vehicle reflects a small part of this RF energy
back to the antenna. The reflected radio waves denote the tag's unique identification
code and other stored data.
The antenna relays the signal to the reader, which can add information such as date/
time to the tag's identification code, and stores it in a buffer. The reader can transmit
the tag's identification code to the customer's information management system. The
entire process takes only milliseconds.
The IT2020 Reader Logic Card is housed within a lane controller or PC chassis,
eliminating the need for a stand-alone reader. The reader logic card uses application-
specific software to communicate with the lane controller or host computer. All reader
commands and logic functions are incorporated into a single IT2020 Reader Logic
Card.
The IT2611 RF Module is connected to and works in conjunction with the IT2020
Reader Logic Card to provide two-way RF communications with tags. It is mounted
near the antennas to reduce signal losses to and from the antennas. The RF module
attaches to the antennas with low-loss coaxial cables.
The antennas, along with the RF module, provide the radio signal required to achieve
the bidirectional wireless communications link between the tag and the reader.
A check tag is a special purpose tag that can be permanently installed in an antenna or
is installed near an antenna that does not have an internal check tag. For the IT2200
Reader System, the check tag is integrated into the RF module and has a separate
check tag antenna.
The check tag can simulate a toll transaction, thereby providing a means for the reader
to check the system operation. The check tag, activated on command by the lane
controller or host computer, provides a test of the antennas, RF source, preamplifier,
encoder/decoder, microprocessor, communications port, and input/output (I/O)
control.
The IT2502 Check Tag Antenna is used to communicate with a check tag that is
located inside the RF module. The check tag antenna is placed directly in front of the
transmit antenna.
IT2200-series tags are self-contained RFID devices that are capable of bidirectional
communications with a reader. ATA tags are read-only that communicate from tag to
reader. Tags are available for interior or exterior installation.
The IT2410 Tag Programmer is used to read data from and write data to tags used in
an RFID system.
Each of the system components listed above is described in detail in this chapter.
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