Reading Distances - Bosch LECTUS select E Installation Manual

10 en | System overview
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3.5

Reading distances

The normal reading distance depends on the respective reading system, the installation
environment and the type of data carrier. Direct mounting on metal might reduce the
optimal reading distance.
MIFARE
Classic 1k
Classic 4k
DESFire EV1 2k / 4k / 8k
*-key fob not available during the test.
Note: Not all designs and transponder media were available at the time the distance was
measured.
Notice!
The measurement of the previous reading distances was based on a selection of
i
transponder media. Consider the measured reading distances as typical guide values.
If other transponder media are used, such as different chip type, design, size or production
process, the reading distances may differ. It is recommended to do a suitability and
functional test of the respective medium before using or planning to use the reader.
Influencing (reducing) the reading distance
The reading distance can be influenced due to different reasons. On the one hand this is
influenced by the medium (i.e. the data carrier) and on the other hand by the ambient
conditions of the antenna and the data carrier.
The following is a list of points that can reduce the reading distance:
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2024-11 | V02 |
MIFARE DESFire EV1 2k / 4k / 8k
MIFARE DESFire EV2 and EV3
ISO 14443A transponder (CSN)
Type of transponder media
"Shade" or shield the data carrier with metal, such as EC card in your wallet, key fob on
your key ring, etc.
No optimal coupling, i.e., the antenna surface of the data carrier is perpendicular (90 °)
to the antenna surface of the reader
Data carrier itself
– key fob (small active antenna surface)
– "bad" response from the data carrier (ID card / key fob)
– combination ID card (e.g. LEGIC® / inductive, MIFARE / inductive etc.)
Metal in the "active" effective area of the HF field. The transmission energy is
attenuated. This point is particularly relevant when installing the reader components in
metal front panels (including metal columns, etc.).
EC-Format
3.5
4
1
Installation manual
Reading distances (cm)
Key fob
3
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1
Bosch Security Systems B.V.
LECTUS select E