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5
Comparison of the safety data
WARNING!
Explosion hazard
Compare the safety data before you connect a module located in the Ex-i area to the JUMO Ex-i isolating
switch amplifier.
Provide proof of intrinsic safety according to the standard IEC/EN 60079-14 and, if necessary, additional
national standards and installation regulations.
Safety data of the
Field devices:
NAMUR Ex-i isolating switch amplifier
You can find the values for U
IECEx", Page 9.
Example for proof of intrinsic safety (simple electrical circuit):
Data
U
≥ U
i
o
I
≥ I
i
o
P
≥ P
i
o
L
+ L
≤ L
i
c
C
+ C
≤ C
i
c
L
+ L
≤ 0.5 L
i
c
C
+ C
≤ 0.5 C
i
c
L
and C
c
c
Proof of intrinsic safety (simple intrinsically safe electrical circuit)
In a simple intrinsically safe electrical circuit without external concentrated capacitances (C
external concentrated inductances (L
chapter 2.6 "Safety data in accordance with ATEX and IECEx", Page 9
Proof of intrinsic safety (mixed intrinsically safe electrical circuit)
Condition for the mixed intrinsically safe electrical circuit with external concentrated capacitances (C
and/or external concentrated inductances (L
•
L
< 1 % of L
i
The full values of C
chapter 2.6 "Safety data in accordance with ATEX and IECEx", Page 9
•
L
≥ 1 % of L
i
The values of C
•
C
+ C
i
•
L
+ L
i
c
In order to be able to realize larger line lengths, you can also use certified value pairs alternatively to the
values reduced by 50 %.
chapter 2.6 "Safety data in accordance with ATEX and IECEx", Page 9
, I
o
o
o
o
o
o
depend on the cables/lines used.
or C
< 1 % of C
0
i
and L
can also be used here.
0
0
and C
≥ 1 % of C
0
i
and L
that have been reduced by 50 % must be used here:
0
0
≤ 0.5 C
c
0
≤ 0.5 L
0
5 Comparison of the safety data
U
, I
, P
, L
, C
i
i
i
i
U
, I
, P
, L
o
o
o
, P
, L
, C
in chapter 2.6 "Safety data in accordance with ATEX and
o
o
o
Conditions
-
-
-
L
< 1 % of L
or C
i
o
i
L
≥ 1 % of L
or C
i
o
i
, the full values of C
i)
):
i
0
0
i
, C
o
o
< 1 % of C
o
≥ 1 % of C
o
nd L
can be used.
0
0
) and without
i
)
i
19
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