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Industrial Computers for Hazardous Locations
Rockwell Automation Publication 6181X-IN001C-EN-P - April 2011
The following statement applies when the equipment is used in a hazardous location.
Hot Surfaces
Restricted Access Location
Restricted access locations for the equipment should meet these conditions:
•
Access can only be gained by service personnel or by users who have been instructed on
the reasons for the restrictions applied to a location and about any precautions that
should be taken.
•
Access is through the use of a tool or a lock and key, or other means of security, and is
controlled by the authority responsible for the location.
Explosion Hazard
•
Substitution of components may impair suitability for hazardous locations.
•
Do not disconnect equipment unless power has been switched off and area
is known to be nonhazardous.
•
Do not connect or disconnect components unless power has been switched
off.
•
Peripheral equipment must be suitable for the location it is used in.
•
In the U.S. all wiring must be in accordance with Class I, Division 2 wiring
methods of Article 501 of the National Electrical Code, and in accordance
with the authority having jurisdiction. Refer to control drawing information
in this document for allowable circuit parameters in Class I, Division 2
applications.
•
In Canada all wiring must be in accordance with Section 18-1J2 of the
Canadian Electrical Code, and in accordance with the authority having
jurisdiction.
•
For European Zone 2 applications transient limiting shall be provided in the
application that limits transient overvoltages to not more than 40% above
the applied voltage.
•
For European Zone 2 applications, non-display computers must be mounted
completely within an enclosure rated IP54 minimum.
•
For European Zone 2 (gases) applications computers with displays must be
mounted through the wall or door of an enclosure rated IP54 minimum. For
European Zone 22 (dusts) applications computers with displays must be
mounted through the wall or door of an enclosure rated IP6x minimum.
Computers with displays support enclosures rated up to IP66.
•
For European Zone 2 applications do not use the USB ports unless the area
is known to be nonhazardous.
•
These devices shall be properly connected to ground in the final application
by using the ground terminal screw provided on the computer chassis.
When used above 50 °C (122 °F) the backside of the 6181X-12TPXPDC
computer and the entire 6181X-NPXPDC computer must be installed in a
restricted access location.
