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71
11 Supplement
VEGAPULS 67 • 4 … 20 mA/HART - four-wire
36532-EN-160224
Output variable
Output signals
4 … 20 mA/HART - active; 4 … 20 mA/HART - passive
Range of the output signal
3.8 … 20.5 mA/HART (default setting)
Terminal voltage passive
9 … 30 V DC
Shortcircuit protection
Available
Potential separation
Available
Signal resolution
0.3 µA
Failure signal current output (adjustable) mA-value unchanged 20.5 mA, 22 mA, < 3.6 mA
Max. output current
22 mA
Starting current
≤ 3.6 mA
Load (4 … 20 mA/HART - active)
< 500 Ω
Damping (63 % of the input variable)
0 … 999 s, adjustable
HART output values
Ʋ
PV (Primary Value)
Distance
Ʋ
SV (Secondary Value)
Percent
Ʋ
TV (Third Value)
Lin. percent
Ʋ
QV (Fourth Value)
Scaled
Resolution, digital
< 1 mm (0.039 in)
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 internal 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
See following diagrams