Operation Of The Electronics - Siemens SITRANS P DS III Operating Instructions Manual

Description
3.7 Principle of operation
3.7.2

Operation of the electronics

Description
①
②
③
④
⑤
⑥
⑦
Image 3-4
Function
● The inlet pressure is converted into an electrical signal by the sensor
● This signal is amplified by the measuring amplifier
converter
● The digital signal is analyzed in a microcontroller
and thermal characteristics.
● The signal is available at an electrically isolated PA interface
28
Measuring cell sensor
Measuring amplifier
Analog-to-digital converter
Microcontroller
Electrical isolation
Each with an EEPROM in the measuring cell
and in the electronics
PROFIBUS PA interface
Principle of operation of the electronics with PA communication
③
.
⑧
Buttons (local operation)
⑨
Display
⑩
Power supply
⑪
DP/PA coupler or DP/PA link
⑫
Bus master
p Input variable
e
①
②
and digitized in an analog-to-digital
④
and corrected with regard to linearity
⑦
on the PROFIBUS PA.
SITRANS P DS III/P410 with PROFIBUS PA
Operating Instructions, 02/2016, A5E00053276-08
.