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Ω
1000
750
500
1
250
14
16
18
Fig. 24: Voltage diagram
HART load
1
Voltage limit EEx-ia instrument
2
Voltage limit non-Ex/Exd instrument
3
Operating voltage
4
Electrical protective measures
Protection
Overvoltage category
Protection class
Functional safety (SIL)
Functional safety according to IEC 61508/IEC 61511
Single channel architecture (1oo1D)
-
double channel diversitary redundant
-
architecture (1oo2D)
Approvals
7)8)
ATEX ia
ATEX D
ATEX ia + D
IEC ia
Others
LEVEL TRANSMITTER 8137 • 4 ... 20 mA/HART
20
22
24
IP 66/IP 67
III
II
up to SIL2
up to SIL3
ATEX II 1G, 1/2G, 2G EEx ia IIC T6; ATEX II 1G, 1/
2G, 2G EEx ia IIC T5+ATEX II 1/2D IP6X T6
ATEX II 1/2 D IP6X T
ATEX II 1G, 1/2G, 2G EEx ia IIC T5+ATEX II 1/2D
IP6X T6
IEC Ex ia IIC T6
WRA
7)
Deviating data in Ex applications: see separate safety instructions.
8)
Depending on order specification.
2
26
28
30
10 Supplement
3
4
32
34
36
V
47
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