Endress+Hauser PROline promag 53 - 5.2 Local Display

Proline Promag 53 FOUNDATION Fieldbus
Endress+Hauser 31
0
<
Fieldbus connection KMD0-FT-Ex (Pepperl+Fuchs):
• Nominal values:
U
i
=24 V
I
i
=280 mA
P
i
=1.93 W
R = 100 Ω
C=1 µF
Suitable for connection to a fieldbus system based on the FISCO model.
Step 2 – technical safety considerations acc. FISCO model
This step uses the existing data to check whether connecting the equipment is permis-
sible from the point of view of technical safety. The conditions shown in the FISCO model
apply to these safety considerations (see Page 16). First the functional data of the
equipment used is compared. In this consideration it is crucial that the maximum output
voltage and output current of the bus power supply does not exceed the permitted max-
imum input voltage and input current of the individual field devices. Here we consider
possible error behaviour by the bus power supply that could result in the stated maxi-
mum values on the intrinsically safe sides.
Since all the users are permissible for explosion group IIC and the corresponding
parameters have been taken into consideration, the bus segment can be used for gases
in explosion group IIC.
Intrinsically safe equipment Condition Associated equipment
FISCO Power Repeater
KLD2-PR-Ex1.IEC1
Condition met?
Promag 53
U
i
= 30 V ≥ U
o
= 15 V ✓ Yes
I
i
= 500 mA ≥ I
o
= 207.2 mA ✓ Yes
P
i
= 5.5 W ≥ P
o
= 1.93 W ✓ Yes
As a further condition galvanic isolation must be provided due to the local
supply
✓ Yes
Cerabar S
U
i
= 17.5 V ≥ U
o
= 15 V ✓ Yes
I
i
= 500 mA ≥ I
o
= 207.2 mA ✓ Yes
P
i
= 5.5 W ≥ P
o
= 1.93 W ✓ Yes
Fieldbus connection
KMD0-FT-Ex
U
i
= 24 V ≥ U
o
= 15 V ✓ Yes
I
i
= 280 mA ≥ I
o
= 207.2 mA ✓ Yes
P
i
= 1.93 W ≥ P
o
= 1.93 W ✓ Yes