Festo CPX-AB Series Electronic Manual page 138

4. Analogue input module CPX−4AE−T
1
Lower limit of rated
range
2
Measured value
(example)
3
Upper limit of rated
range
4
Physical measuring
variables
5
Resistance of the
sensor
6
Digital value range
after A−D conversion
7
Digital input value
(example)
Fig. 4/5: Example: Representing the temperaturesfor a Pt 100 sensor
4−16
The diagram below shows the processing of the input signals
of a temperature sensor. A Pt 100 sensor in the standard tem
perature range is used as an example. (temperature coeffi
cient TK = 0.00385 /°C).
1
4
− 200 °C
5
18.52
6
− 2000
7
2
+ 42 °C
116.313
420 + 8500
Festo P.BE−CPX−AX−EN en 0503b
3
+ 850 °C
390.481