VEGA VEGAPULS 66 (≥ 2.0.0 - ≥ 4.0.0) Modbus and Levelmaster protocol - Manual (Page 57)

57
11 Supplement
VEGAPULS 66 • Modbus and Levelmaster protocol
41366-EN-121011
3
4
2
1
Fig. 44: Data of the input variable
1 Reference plane
2 Measured variable, max. measuring range
3 Antenna length
4 Useful measuring range
Max. measuring range 35 m (114.83 ft)
Recommended measuring range
Ʋ Flange DN 150, 6" up to 15 m (49.21 ft)
Ʋ Flange DN 250, 10" up to 20 m (65.62 ft)
Output variable
Output
Ʋ Physical layer Digital output signal according to standard EIA-485
Ʋ Bus specifications Modbus Application Protocol V1.1b, Modbus over serial
line V1.02
Ʋ Protocols Modbus RTU, Modbus ASCII, Levelmaster
Max. transmission rate 9.6 Kbit/s
Accuracy (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 Min. distance to installations > 200 mm (7.874 in)
Ʋ Reflector Plane plate reflector
Ʋ False reflections Largest false echo 20 dB smaller than the useful echo
Deviation with liquids See following diagrams