Mounting And Installation - Stahl 9471/35 Serie Betriebsanleitung

Mounting and Installation

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8 Mounting and Installation
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When installed in a corresponding suitable field enclosure, the device is permitted for use
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in hazardous areas in Zone 2 and Zone 22 or in safe areas.
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16
Digital Input Output Module NAMUR
for Ex n Zone 2
Series 9471/35
Explosion hazard due to installation without field enclosure!
Non-compliance results in severe or fatal injuries!
• When used in Zone 2 or Zone 22, the device is to be installed in a
protective enclosure or in a cabinet that offers a suitable degree of
protection in accordance with IEC/EN 60079-0.
• An enclosure with at least an IP54 protection rating is required for
use in Zone 2 and in safe areas.
• An enclosure with at least an IP64 protection rating is required for
use in Zone 22.
Explosion hazard due to incorrect installation of the device!
Non-compliance results in severe or fatal injuries.
• Carry out installation strictly according to the instructions and
national safety and accident prevention regulations to maintain the
explosion protection.
• Select and install the electrical device so that explosion protection
is not affected due to external influences, i.e. pressure conditions,
chemical, mechanical, thermal and electric impact such as
vibration, humidity and corrosion (see IEC/EN 60079-14).
• The device must only be installed by trained qualified personnel
who is familiar with the relevant standards.
Interfering frequencies in the frequency measuring ranges can interfere with
the frequency/counter function.
If the installation has strong electromagnetic sources of interference or
the electrical lines are more than 30 m long, use of shielded field cables is
recommended to achieve the specified data. To this end, the shield must be
connected to the equipotential bonding of the hazardous area and placed on
the shield busses in the enclosure as close to the entry point as possible.
The shield busses must also be connected to the mounting plate close to the
entry point of the field wiring using the shortest possible route.
See the "Grounding and shielding" instructions.
DANGER
DANGER
230230 / 947160310010
2017-03-16·BA00·III·en·00