S5-115F Manual Analog Value Processing
Resolution of the PT 100 is approximately 1/3 °C. 10 units correspond approx. to 1 ohm.
You can use the assignments in Figure 6-12 for PT 100 resistance-type sensor.
The input values are not linearized by the modules. You can only linearize the input values via a
relevant software solution.
Figure 6-12. PT 100 Connected to SIMATIC Analog Input Modules
°C
- 270 - 220 0 270 750 ca. 890
0 10 100 200 360 400
mV
0 25 250 500 900 1000
Units
0 102 1024 2048 3680 4096
Overrange
Resolution: 10 units = 1
270 °C : 1024 units = 0.3 °C / unit
Non-linear range
U = R · I = R · 2.5 mA (constant current)
EWA 4NEB 811 6148-02
6-19
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