D101925 0412 -
BLident®
UHF
2-11
General information on the UHF read/write heads
2.5.3
Read range/write range
The achievable read/write distances depend on the relevant combination of data carrier and read/write
head. The possible read/write distance depends on the data volume to be written and read as well as
the speed at which the data carrier moves past the read/write head. The UHF read/write heads normally
have a read/write range of several meters.
2.6
General information on the UHF read/write heads
The operating frequency in the UHF band is between 840 MHz and 960 MHz depending on the region
of use.
All TURCK UHF read/write heads are suitable for single and multiple access of the data carriers.
2.6.1
Connecting the read/write heads
Note
Only read/write heads with a type label on the back (as in Figures 2 and 3) can be used on the
devices with the TURCK BL20, BL67 and BLcompact systems.
Refer to the enclosed instruction leaflets of the devices for further information on the
connection.
Figure 2:
Type label on TN...-
Q150L170-V1147
(M8 female
connector)
+
1
3
4
2
Data
Data
3
1
4
2
Figure 3:
Type label on TN...-
Q240L280-H1147/
TN...-Q280L640-
H1147
(M12 female
connector)
+
1
3
4
2
Data
Data
3
2
4
1
Note
The maximum read/write distance of several meters is only an idealized value under
laboratory conditions.
Component tolerances, mounting location in the application, ambient conditions and the
effect of materials (particularly metal and liquids) can reduce the achievable distances.
The parameters for achievable traversing speed (read and write operations on the fly) and
the maximum transmittable data volume also vary, depending on the actual transmission
curve in the relevant application.
Depending on the data carrier, the maximum write distance can be considerably less
(e.g. 50 %) than the maximum read distance.
For this reason, the application must be tested under real conditions!
