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Installation in Hazardous Areas
4
Installation in Hazardous Areas
4.1
Installation in Zone 2 Category 3G
The PROFIBUS Power Hub Segment Coupler may be installed in
Zone 2 Category 3G. The protection class is EEx nA C (non-arcing) gas
group IIC, IIB, IIA. Depending on the type of Power Modules used, dif-
ferent topologies and Zone 2 installations can be implemented.
The Fieldbus trunk is always categorized as EEx nA for Zone 2 applica-
tions. Connecting the PROFIBUS Power Hub with the Pepperl+Fuchs
Segment Protector (SPs) allows hot swapping of field devices.
Special safety instructions
EC type examination certificates and EC Certificates of Conformity and/
or the manufacturer's Declaration of Conformity must be observed. It is
especially important to observe the "Special Conditions" included in
these documents.
•
Connections of non-energy-limited circuits under voltage may only be
made or disconnected during installation or maintenance or for repair
purposes.
Warning
•
If it is mounted in the hazardous area of Zone 2 Category 3G, the device
must be mounted in a housing, corresponding to at least protection class
IP 54 in accordance with EN 60529 and suitable for this type of installa-
Warning
tion.
•
The possibility of an explosive atmosphere occurring during installation,
maintenance or repairs is evaluated as improbable in Zone 2.
Warning
•
Devices that have been operated in general electrical plants must not be
used again after that in electrical plants that are connected to hazardous
areas.
Warning
Subject to reasonable modifications due to technical advances.
28
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