Siemens SITRANS TW 7NG3242 Betriebsanleitung Seite 86

Technical Description
1 analog-digital converter
2 microcontroller
3 non-volatile memory
4 operating display
5 digital-analog converter
6 power supply unit
7 message relay
a sensor connection
b message relay output for sensor error / limit value alarm
c HART output terminals for connecting on-size parameterization
d analog measuring output (current or voltage output)
e test socket (only for current output)
f connection of power supply and PE conductor
Figure 5
86
Block diagram SITRANS TW transmitter, 4-wire mounting rail device
Output
U or I
Power
supply
HART modem/
Communicator
Measuring
instrument
0/4 - 20mA
SITRANS TW
A5E00054075-05