7.8.4
Configuring instructions
7.8.4.1
Temperature dependence of the transmission window
The guidelines in the section "Planning the RF300 system" apply to configuration of heat-
resistant data memories, with the exception of the limit distance and field length at
temperatures above 85 °C. At temperatures above 85 °C, the length of the transmission window
is reduced by up to 10%.
7.8.4.2
Temperature response in cyclic operation
At ambient temperatures (T
u
) up to 110 °C, cyclic operation is not necessary, i.e. up to this
temperature, the transponder can be in constant operation.
Note
Calculation of the temperature curves
Calculation of the temperature curves or of a temperature profile can be carried out on request
by Siemens AG. Exact knowledge of the internal temperature facilitates configuration for time-
critical applications.
Ambient temperatures > 110 °C
Note
Cancellation of warranty
The internal temperature of the data memory must not exceed the critical threshold of 110 °C.
Each heating phase must be followed by a cooling phase. No warranty claims will otherwise be
accepted.
Some limit cycles are listed in the table below:
Table 7-18
Limit cycles of data memory temperature
T
u
(heating up)
Heating up
T
u
(cooling down)
Cooling down
220 °C
0.5 h
25 °C
> 2 h
200 °C
1 h
25 °C
> 2 h
190 °C
1 h
25 °C
> 1 h 45 min
180 °C
2 h
25 °C
> 5 h
170 °C
2 h
25 °C
> 4 h
The internal temperature of the tag follows an exponential function with which the internal
temperature and the operability of the tag can be calculated in advance. This is particularly
relevant to temperature-critical applications or those with a complex temperature profile.
RF300 transponder
7.8 SIMATIC RF380T
SIMATIC RF300
System Manual, 02/2021, C79000-G8976-C345-09
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