UMSITRAPDS3-1
Circuit Description
November 2010
8-1
8.0 CIRCUIT DESCRIPTION
This section provides a basic circuit description of the SITRANS P DSIII Pressure Transmitter. Figure 8-
1 shows the functional block diagram. Basically the transmitter consists of two active components: a
measuring cell and an electronics module. Input pressure is piped to the measuring cell (1) that includes
diaphragms, fill fluid, and related components. The output signal from the measuring cell goes to the
electronics module that consists of the microcontroller (4), A/D (3) and D/A (5) converters, HART
modem (7), and related components. The magnetic pushbuttons (8) and display (9) connect to the
electronics module.
The transmitter family consists of four model types: flow, differential pressure, absolute pressure, and
flange-mounted liquid level. All models use the same interchangeable electronics module, display,
enclosure, and magnetic pushbuttons. The major difference between models is the measuring cell.
The transmitters can communicate with a Model 275 HART Communicator, Model 375 Field
Communicator, or a Primary Master controller using the HART protocol.
1
2
3
4
5
6
Measuring cell sensor
Instrument amplifier
Analog-digital converter
Microcontroller
Digital-analog converter
Two non-volatile memories in the measuring
cell and electronics
7
8
9
10
I
A
U
H
HART modem
Magnetic pushbuttons for local operation
Digital display
Analog output test terminals
Output current
Power supply
FIGURE 8-1 Transmitter Block Diagram
Содержание 7MF4033 series
Страница 48: ...Model 275 Universal Hart Communicator UMSITRPDS3 1 November 2010 2 26 ...
Страница 86: ...Installation UMSITRPDS3 1 November 2010 4 34 ...
Страница 152: ...Calibration and Maintenance UMSITRPSD3 1 November 2010 7 20 ...
Страница 158: ...Circuit Description UMSITRPDS3 1 November 2010 8 6 ...
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Страница 200: ...Model Designations and Specifications UMSITRPDS3 1 November 2010 9 42 ...
Страница 204: ...Glossary UMSITRPDS3 1 November 2010 10 4 ...
Страница 208: ...Appendix A Online Configuration Map UMSITRPDS3 1 11 4 November 2010 ...
Страница 210: ...Appendix B Hazardous Area Installation UMSITRPDS3 1 12 2 November 2010 FIGURE 12 1 Control Drawing ...
Страница 211: ...UMSITRPDS3 1 Appendix B Hazardous Area Installation November 2010 12 3 FIGURE 12 2 Control Drawing ...
Страница 212: ...Appendix B Hazardous Area Installation UMSITRPDS3 1 12 4 November 2010 FIGURE 12 3 Control Drawing ...
Страница 216: ...Appendix C Elevation and Suppression Correction UMSITRPDS3 1 13 4 November 2010 ...