36
13 Supplement
VEGAPULS C 21 • SDI-12
58342-EN-200121
Max. measuring range
2)
15 m (49.21 ft)
Recommended measuring range
3)
up to 10 m (32.81 ft)
Switch-on phase
Start-up time with operating voltage U
B
< 10 s
Output variable
Output signal
SDI-12 (only digital)
Transmission rate
1200 bit/s
Resolution, digital
1 mm (0.039 in)
Data signal
Ʋ Logical 1
0 V
Ʋ Logical 0
5 V
Protocol
SDI-12: 7 data bits, 1 stop bit, even parity
Output voltage
Ʋ Minimum logical 0
3.5 V
Ʋ Maximum logical 1
0.8 V
Deviation (according to DIN EN 60770-1)
Process reference conditions according to DIN EN 61298-1
Ʋ Temperature
+18 … +30 °C (+64 … +86 °F)
Ʋ Relative humidity
45 … 75 %
Ʋ Air pressure
860 … 1060 mbar/86 … 106 kPa (12.5 … 15.4 psig)
Installation reference conditions
Ʋ Distance to installations
> 200 mm (7.874 in)
Ʋ Reflector
Flat plate reflector
Ʋ False reflections
Biggest false signal, 20 dB smaller than the useful signal
Deviation with liquids
≤ 2 mm (meas. distance > 0.25 m/0.8202 ft)
Non-repeatability
4)
≤ 2 mm
Deviation with bulk solids
The values depend to a great extent on the application.
Binding specifications are thus not possible.
2)
Depending on application and medium
3)
With bulk solids
4)
Already included in the meas. deviation
