Read/Write Ranges - Siemens SIMATIC RF600 System Manual

and thus obtain information on the read/write range with this reference angle with regard to a
transponder.
The dBr values correspond to the difference between the maximum dBi value and a second
dBi value.
Deviation from maximum antenna gain [dBr]
0
-3
-6
-9
-12
-15
-18
Example
As one can see from the Antenna pattern ETSI (Page 163), the maximum antenna gain is
-5 dBi. In the vertical plane, the antenna gain has dropped to approx. -11 dBi at +40° and 320°.
Therefore the dBr value is -6. The antenna range is only 50% of the maximum range at ± 40°
from the Z axis within the vertical plane (see values shown in blue in the directional radiation
pattern: characteristic of the vertical plane of the antenna (Page 163) and the associated
representation of the reference system (Page 163)).
6.2.8

Read/write ranges

The following tables show the typical read/write ranges of RF600 readers which are connected
to the RF620A antenna via the 3 m antenna cable (1 dB loss) and various types of tags.
Note
Please note that tolerances of ±20% are admissible due to production and temperature
conditions.
When using other antenna cables, the ranges listed here are reduced as a result of the higher
antenna cable losses in the following manner:
Cable designation Order No.
Antenna cable
Antenna cable
Antenna cable
Antenna cable
The measuring tolerances in the following tables are ±3 cm.
SIMATIC RF600
System Manual, 06/2010, J31069-D0171-U001-A10-7618
Length [m]
6GT2815-0BH30 3
6GT2815-1BN10 10
6GT2815-0BN10 10
6GT2815-0BN20 20
Draft Version 02.06.2010
6.2 RF620A antenna
Read/write range [%]
100
70
50
35
25
18
13
Cable loss [dB] Read/write range [%]
1 100
2 90
4 70
4 70
Antennas
169