73
11 Supplement
SOLITRAC 31 • Profibus PA
43834-EN-211203
Input variable
Measured variable
The measured variable is the intensity of the gamma
radiation of an isotope. When the radiation intensity
decreases, for example due to rising medium, the
measured value of SOLITRAC 31 changes in proportion
to the level.
1
2
L
Fig. 24: Data of the input variable
1 Min. level (red marking line)
2 Max. level
L Measuring range (order length of instruments)
Measuring length (L)
152 … 3048 mm (6 … 120 in)
Measuring range
Depending on the installation conditions (see also chap-
ter
Product description
)
Analogue input
Ʋ Input type
4 … 20 mA, passive
Ʋ Internal load
250 Ω
Ʋ Input voltage
max. 6 V
Switching input
Ʋ Type of input - Open Collector
10 mA
Ʋ Type of input - Relay contact
100 mA
Ʋ Input voltage
max. 24 V
Output variable - Level measurement
Output
Ʋ Output signal
digital output signal, format according to IEEE-754