Endress+Hauser PROline promass 83 II2G Manual page 65

PROline Promass 83 FOUNDATION Fieldbus
Endress+Hauser
Checking the conditions:
Consideration
t 9 V
U
FG eff.
10.5 V t 9 V
Final consideration:
From a purely functional point of view the bus segment shown in the example can be
operated based on the positive results.
Technical safety considerations
using variant Promass 83***-***********G
Step 1 – compilation of technical values relevant to safety:
Fieldbus power supply (associated electrical apparatus)
FISCO Power Repeater KLD2-PR-Ex1.IEC1 (Pepperl+Fuchs):
x Nominal values:
U = 15 V
o
I = 207.2 mA
o
P = 1.93 W
o
Described in the test certificate as "associated equipment". Suitable for connection to
a fieldbus system based on the FISCO model.
Promass 83 (explosion protected electrical apparatus with intrinsically safe FF output):
x Nominal values:
U = 30 V
i
I = 500 mA
i
P = 5.5 W
i
10 P H
L =
i
C = 5 nF
i
Suitable for connection to a fieldbus system based on the FISCO model.
Cerabar S (explosion protected electrical apparatus with intrinsically safe FF output):
x Nominal values FISCO:
U = 17.5 V
i
I = 500 mA
i
P = 5.5 W
i
10 P H
L =
i
C = 5 nF
i
Suitable for connection to a fieldbus system based on the FISCO model.
Bus cable type A (shielded bus cable):
x Nominal values:
24 : /km (loop resistance)
R' =
C' = 82 nF/km (capacitance per unit length)
623 P H/km (inductance per unit length)
L' =
Condition met?
 Yes
0
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