16 POINT I/O Output Module
Publication 1734-IN018A-EN-P - November 2004
European Hazardous Location Approval
The following modules are European Zone 2 approved: 1734-OB2, 1734-OB4 and
1734-OB8.
European Zone 2 Certification (The following applies when the product
bears the EEx Marking)
This equipment is intended for use in potentially explosive atmospheres as defined
by European Union Directive 94/9/EC.
DEMKO certifies that this equipment has been found to comply with the Essential
Health and Safety Requirements relating to the design and construction of Category
3 equipment intended for use in potentially explosive atmospheres, given in Annex
II to this Directive. The examination and test results are recorded in
EC-type-examination certificate DEMKO 04 ATEX 0330347 X.
Compliance with the Essential Health and Safety Requirements has been assured by
compliance with EN 50021.
IMPORTANT
Observe the following additional Zone 2 certification
requirements.
• This equipment is not resistant to sunlight or other sources
of UV radiation.
• The secondary of a current transformer shall not be
open-circuited when applied in Class I, Zone 2 environments.
• Equipment of lesser Enclosure Type Rating must be installed
in an enclosure providing at least IP54 protection when
applied in Class I, Zone 2 environments.
• This equipment shall be used within its specified ratings
defined by Allen-Bradley.
• Provision shall be made to prevent the rated voltage from
being exceeded by transient disturbances of more than 40%
when applied in Class I, Zone 2 environments
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