Electrical connection
Proline Prowirl F 200 PROFIBUS PA
32
Hauser
Experience shows that the best results with regard to EMC are achieved in most cases in
installations with one-sided shielding on the feed side (without capacitance termination at
the field device). Appropriate measures with regard to input wiring must be taken to allow
unrestricted operation when EMC interference is present. These measures have been
taken into account for this device. Operation in the event of disturbance variables as per
NAMUR NE21 is thus guaranteed.
1. Observe national installation requirements and guidelines during installation.
2. Where there are large differences in potential between the individual grounding
points,
connect only one point of the shielding directly to the reference ground.
3. In systems without potential equalization,
the cable shielding of fieldbus systems should be grounded on one side only, for
example at the fieldbus supply unit or at safety barriers.
NOTICE
In systems without potential matching, the multiple grounding of the cable shield
causes mains frequency equalizing currents!
Damage to the bus cable shield.
‣
Only ground the bus cable shield to either the local ground or the protective ground at
one end.
‣
Insulate the shield that is not connected.
2
1
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7
8
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6
6
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6
6
5
A0028768
10
Connection example for PROFIBUS PA
1
Control system (e.g. PLC)
2
PROFIBUS PA segment coupler
3
Cable shield: the cable shield must be grounded at both ends to comply with EMC requirements; observe cable
specifications
4
T-box
5
Measuring device
6
Local grounding
7
Bus terminator
8
Potential equalization conductor
Summary of Contents for Proline Prowirl F 200
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