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Siemens SIMATIC RF300 System Manual Page 24

Rfid-systems simatic sensors.
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RF300 system planning
4.1 Fundamentals of application planning
Table 4-3
S
:
a
S
g
L
SP
The active field for the transponder consists of a circle (cf. plan view).
The transponder can be used as soon as the intersection (SP) of the transponder enters the
circle of the transmission window.
From the diagrams above, it can also be seen that operation is possible within the area
between S
shrinks to a single point at distance S
between S
4-4
ANT18 and ANT30 transmission window and read/write distance
Operating distance between transponder and reader
Limit distance (maximum clear distance between upper surface of the reader and the
transponder, at which the transmission can still function under normal conditions)
Diameter of a transmission window
The length L
is valid for the calculation. At S
d
Intersection of the axes of symmetry of the transponder
and S
. The active operating area reduces as the distance increases, and
a
g
and S
.
a
g
, the field length increases from L
a,min
. Only static mode should thus be used in the area
g
System Manual, Release 04/2006, J31069 D0166-U001-A2-7618
to L
.
d
max
SIMATIC RF300

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