Rockwell Automation Publication 1766-UM001I-EN-P - June 2015 9
Install Your Controller Chapter 2
Safety Considerations
Safety considerations are an important element of proper system installation.
Actively thinking about the safety of yourself and others, as well as the condition
of your equipment, is of primary importance. We recommend reviewing the
following safety considerations.
Hazardous Location Considerations
This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or
non-hazardous locations only. The following WARNING statement applies to
use in hazardous locations.
ATTENTION: Be careful of metal chips when drilling mounting
holes for your controller or other equipment within the enclosure or
panel. Drilled fragments that fall into the controller or I/O modules
could cause damage. Do not drill holes above a mounted controller
if the protective debris shields are removed or the processor is
installed.
WARNING: Do not place the MicroLogix 1400 Programmable
Controller in direct sunlight. Prolonged exposure to direct sunlight
could degrade the LCD display and have adverse effects on the
controller.
The controller is not designed for outdoor use.
WARNING: EXPLOSION HAZARD
• Substitution of components may impair suitability for Class I,
Division 2.
• Do not replace components or disconnect equipment unless power
has been switched off.
• Do not connect or disconnect components unless power has been
switched off.
• This product must be installed in an enclosure. All cables
connected to the product must remain in the enclosure or be
protected by conduit or other means.
• All wiring must comply with N.E.C. article 501-10(b) and/or in
accordance with Section 18-1J2 of the Canadian Electrical Code,
and in accordance with the authority having jurisdiction.
• For applicable equipment (for example, relay modules), exposure
to some chemicals may degrade the sealing properties of the
materials used in these devices:
– Relays, epoxy
It is recommended that you periodically inspect these devices for
any degradation of properties and replace the module if
degradation is found.
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