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Description
3.5 Functional principle
SITRANS P500 with HART
Operating Instructions, 12/2014, A5E02344528-09
25
3.5
Functional principle
3.5.1
Operation of the electronics
Description
①
Measuring cell sensors
⑦
HART modem
②
Measuring amplifier
⑧
Buttons (local operation)
③
Analog-to-digital converter
⑨
Display
④
Microcontroller
⑤
Digital-to-analog converter
I
A
Output current
⑥
Each with an EEPROM in the measuring
cell and in the electronics
U
H
Auxiliary power
Figure 3-5
Operation of electronics with HART communication, simplified illustration
Function
●
The input pressure is converted into an electrical signal by the sensor
①
.
●
This signal is amplified by the measuring amplifier
②
and converted in an analog-to-
digital converter
③
.
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