VEGA VEGABAR 52 4 … 20 mA_HART - Manual (Page 50)

50
10 Supplement
VEGABAR 52 • 4 … 20 mA/HART
36717-EN-130321
Ʋ Connection cable with IP 68 1 bar
version
PE
Weight approx. 0.8 … 8 kg (1.764 … 17.64 lbs), depending on process
fitting
Output variable
Output signal
4 … 20 mA/HART
HART output values according to HART standard 5.0
Ʋ Primary Value Pressure
Ʋ Secondary Value Temperature 9)
Signal resolution 1.6 µA
Failure signal current output (adjustable) mA-value unchanged 20.5 mA, 22 mA, < 3.6 mA
Max. output current
22 mA
Load see load diagram under Power supply
Met NAMUR recommendation NE 43
Dynamic behaviour output
Run-up time approx.
10 s
90 %
100 %
10 %
t
t
T A
t
t
S
2 1
Fig. 27: Sudden change of the process variable. t
T
: dead time; t
A
: rise time; t
S
: jump response time
1 Process variable
2 Output signal
Dead time ≤ 150 ms
Rise time ≤ 100 ms (10 … 90 %)
Step response time ≤ 250 ms (ti: 0 s, 10 … 90 %)
Damping (63 % of the input variable) 0 … 999 s, adjustable
Additional output parameter - temperature
Processing is made via output signal HART multidrop, Profibus PA and Foundation Fieldbus
Range
-50 … +150 °C (-58 … +302 °F)
Resolution 1 °C (1.8 °F)
9) Depending on the respective instrument and the process fitting, the temperature can deviate from the real
process temperature.