Rockwell Automation Publication 6181X-UM002A-EN-P - October 2017
17
Install the Computer
Chapter 2
The following statement applies to when the computer is used in a hazardous
location.
Hot Surfaces
Restricted Access Location
Verify that restricted access locations for the equipment meet these conditions:
• Access is gained only by service personnel or by users who have been
instructed on the reasons for restrictions to a location and about any
precautions to be taken.
• Access is by using a tool, a lock and key, or other means of security
controlled by the authority responsible for the location.
WARNING: Explosion Hazard
• Substitution of components can impair suitability for hazardous locations.
• Do not disconnect equipment unless power has been switched off and the
area is known to be non-hazardous.
•
Do not connect or disconnect components unless power has been switched off.
• Peripheral equipment must be suitable for the location where it is used.
• 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.
• 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 and IECEx applications:
–
Transient protection shall be provided that is set at a level not
exceeding 140% of the peak rated voltage value at the supply terminals
to the equipment.
–
Non-display computers must be installed in a Pollution Degree 2
environment and fully mounted within an enclosure rated IP54 minimum.
–
The USB ports have not been evaluated as nonincendive field wiring.
• For European Zone 2 (gases) and IECEx applications, computers with displays
must be installed in a Pollution Degree 2 environment and mounted
through the wall or door of an enclosure rated IP54 minimum.
• For European Zone 22 (dusts) and IECEx applications, computers with
displays must be installed in a Pollution Degree 2 environment and mounted
through the wall or door of an enclosure rated IP6x minimum. Computers
with displays support enclosures rated up to IP66.
• In final applications, properly connect these devices to ground by using the
ground terminal screw on the computer chassis.
ATTENTION:
When used above 50 °C (122 °F), the backside of display
computers and entire non-display computers must be installed in a
restricted access location.
