Mounting and Installation
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230230 / 947160310010
2019-03-08·BA00·III·en·01
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Digital Input Output Module NAMUR
for Ex n Zone 2
Series 9471/35
8
Mounting and Installation
The device is approved for use in gas explosion hazardous areas of Zone 2 and
dust explosion hazardous area of Zone 22 and in safe areas.
8.1
Dimensions / Fastening Dimensions
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.
Dimensional drawings (all dimensions in mm [inches]) – Subject to alterations
15254E00
64
[2,52]
128,5 [5,06]
68
[2,68]
70
[2,76]
96,5 [3,8]
98 [3,86]
