Ex Ic; Ex Nl; Housing - Pepperl+Fuchs FIELDBUS Manual

Compact Fieldbus Power Hub,Generic Interface
Safety
Take special care if Power Supply Modules are to be used with Pepperl+Fuchs Segment
Protectors for energy limited Ex nL, intrinsically safe Ex ic and non-incendive field wiring. 
Doublecheck to ensure that the correct type of Power Supply Module is used in relation to its
output values. For example, the output voltage must be equal or less than the maximum voltage
of the connected field devices.
Requirements for all used fieldbus products in Zone 2 installations are summarized in the
manual: "Using Pepperl+Fuchs fieldbus equipment in Zone 2 hazardous area environment".
You will find this document on the product page of the device at www.pepperl-fuchs.com.
The devices must be installed and operated only in enclosures that
comply with the requirements for enclosures according to IEC/EN 60079-0
■
are rated with the degree of protection IP54 according to IEC/EN 60529
■
Avoid electrostatic discharges while operating the installed device. Avoid electrostatic charge.
In Zone 2, only such devices are allowed to be connected to circuits that are suitable for the
operation in explosion hazardous areas of Zone 2 and for the conditions available at the place
of operation (declaration of conformity or certificate of a testing department).
1.8.3

Ex ic

The intrinsically safe circuits of the associated apparatus may lead into hazardous areas. Make
sure to observe all relevant distances (creepage distances, clearances) to all non-intrinsically
safe circuits in accordance with IEC/EN 60079-14.
If "Ex ic" protected circuits are operated with non-intrinsically safe circuits, they must no longer
be used as "Ex ic" protected circuits.
The respective peak values of the field device and the associated apparatus with regard to
explosion protection should be considered when connecting intrinsically safe field devices with
intrinsically safe circuits of associated apparatus (verification of intrinsic safety). Make sure to
observe IEC/EN 60079-14 and IEC/EN 60079-25.
When using the Fieldbus Power Hub with Pepperl+Fuchs Segment Protectors to generate Ex ic
rated outputs, connector covers (ACC-MB-CC) have to be plugged on the bulk power supply
connectors. This is to guarantee the clearance distance of 50 mm between host terminal and
power supply connectors.
The devices must be installed and operated only in an environment that ensures a
pollution degree 2.
1.8.4

Ex nL

"Ex nL" protected circuits (limited energy) must no longer be used as "Ex nL" protected circuits,
if these circuits were operated with non-intrinsically safe circuits or
■
if these circuits were operated with circuits that do not comply with the type of protection
■
"Ex nL".
1.9

Housing

If additional housings are needed for installation in hazardous areas, the following points must
be considered / evaluated:
To ensure the IP degree of protection:
all seals must be undamaged and correctly fitted
■
all screws of the housing / housing cover must be tightened with the appropriate torque
■
only cable of the appropriate size must be used in the cable glands
■
all cable glands must be tightened with the appropriate torque
■
all empty cable glands must be sealed with sealing plugs
■
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