VEGA VEGABAR 75 4 … 20 mA_HART - Manual (Page 33)

1000
710
500
250
12 18 16 14 20 22 24 26 28 29 30 32 34 36
Ω
V
1
4
2
3
Fig. 11: Voltage diagram VEGABAR 75
1
HART load
2 Voltage limit Ex instrument
3 Voltage limit non-Ex instrument
4 Voltage supply
L oad in conjunction with VEGADIS 12 see diagram
Ω
450
712,5
250
18 24 29 36 33
3
4
2
1
V
Fig. 12: Voltage diagram VEGABAR 75 with VEGADIS 12
1
HART load
2 Voltage limit Ex instrument
3 Voltage limit non-Ex instrument
4 Voltage supply
Integrated overvoltage protection
N ominal leakage current (8/20 µs) 10 kA
S upplement
VEGABAR 75 - 4 … 20 mA/HART 33
28433
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EN
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