Towitek TWT2021 Universal-RFID-Antenna C-Control TWT2021 Fiche De Données
Codes de produits
TWT2021
Principle of operation
The RFID antenna will start generating a 125kHz electromagnetic field
immedeately after applying power to the unit. Transponders getting within
reading range of the antenna will be automatically detected and read.
immedeately after applying power to the unit. Transponders getting within
reading range of the antenna will be automatically detected and read.
Upon reading the 64 bit signature of the transponder the data integrity is
validated by checking the header and parity bits.
validated by checking the header and parity bits.
If all checksum information is found correct the 40 bit of the serial number
information are transmitted as 5 byte string via the serial interface.
information are transmitted as 5 byte string via the serial interface.
The serial interface works according to common standard but for
reference the details will be explained here:
reference the details will be explained here:
The serial data transmission uses a bitrate of 9600 bits per second
which is is equal to 104µS per bit.
which is is equal to 104µS per bit.
Each byte transmission is started with a start bit at low level. (0V)
Following the start bit 8 data bits are sent with the least significant bit
(LSB) transmitted first. A logical '1' is represented with high level (VCC),
a logical '0' with low level (0V)
(LSB) transmitted first. A logical '1' is represented with high level (VCC),
a logical '0' with low level (0V)
Each byte transmitted ends with a stop bit at high level (VCC)
5 Bytes are transmitted in a straight sequence.
If the transponder remains within reading range of the Antenna, the ID
data will be sent continously at a rate of approximately 5 times per
second. The transmission will only end after the transponder has been
removed from the reading range.
data will be sent continously at a rate of approximately 5 times per
second. The transmission will only end after the transponder has been
removed from the reading range.
A detailed description of the raw data format of the transponders and
transponder technology in general can be found in datasheets for the
EM4102 transponder easily found with internet research.
transponder technology in general can be found in datasheets for the
EM4102 transponder easily found with internet research.
Important notice:
The polarity of the serial data transmission using TTL levels is reversed in
comparison with the RS-232 levels used for PC data transmission. For
transmitting the RFID-ID data from the antenna to a PC it is necessary to
use an inverting level converter such as for example MAX232.
comparison with the RS-232 levels used for PC data transmission. For
transmitting the RFID-ID data from the antenna to a PC it is necessary to
use an inverting level converter such as for example MAX232.
The manuals and documentation for our products is constantly improved
and translations to other foreign languages may become available.
and translations to other foreign languages may become available.
Please make sure to check for the latest versions at
www.conrad.com
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19 15 53 ENG - REV 1.10 / 07.08
EU-Declaration of conformity
The company
TowiTek HK Ltd.
ROOM 1613, 16/F.
TAI YAU BUILDING
181 JOHNSTON ROAD
WANCHAI, HONG KONG
declares in their own responsibility that the product
Universal RFID-Antenna BN 19 15 53
complies to the standards
EN 55022 (EMV emission)
EN 61000-6-1 (EMV tolerance)
The above named company keeps records
with confirm the compliance to the standards
Liu Hong Quan Shenzhen 15-12-2008
(managing director)