VEGA VEGABAR 74 4 … 20 mA_HART - Manual (Page 33)

Ω
450
712,5
250
18 24 29 36 33
3
4
2
1
V
Fig. 11: Voltage diagram VEGABAR 74 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
M in. response time < 25 ns
Electrical protective measures
P
rotection
IP 68 (25 bar)/IP 69K
O vervoltage category III
P rotection class III
Approvals 10 )
ATEX
ia
ATEX II 1G EE x ia IIC T6; ATEX II 2G
EE x ia IIC T6
S
hip approvals
GL, LRS, ABS, CCS, RINA, DNV
O thers WHG
10) D eviating data in Ex applications: see separate safety instructions.
S upplement
VEGABAR 74 - 4 … 20 mA/HART 33
28432
-
EN
-070718