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Precautions for Correct Use
NA-series Programmable Terminal Hardware(-V1) User’s Manual (V125)
Precautions for Correct Use
Do not install or store the NA Unit in any of the following locations:
• Locations subject to severe changes in temperature
• Locations subject to temperatures or humidity outside the range specified in the specifications
• Locations subject to condensation as the result of high humidity
• Locations subject to corrosive or flammable gases
• Locations subject to strong shock or vibration
• Locations outdoors subject to direct wind and rain
• Locations subject to strong ultraviolet light
• Locations subject to dust
• Locations subject to direct sunlight
• Locations subject to splashing oil or chemicals
Take appropriate and sufficient countermeasures when installing systems in
the following locations:
• Locations subject to static electricity or other forms of noise
• Locations subject to strong electric field or magnetic field
• Locations close to power supply lines
• Locations subject to possible exposure to radioactivity
Mounting Panel
• To conform to UL Type 1 standards, the mounting panel thickness must be 1.6 to 6.0 mm.
• To conform to UL Type 4X standards, the thickness must be 1.6 to 4.5 mm.
To conform to UL Type 4X standards, always use the NA5-W-V1 with a High-pressure
Waterproof Attachment (PWA). If you do not use a PWA, there is a risk of water entry, which may
cause severe equipment damage.
• Tighten the Mounting Brackets evenly to a torque of between 0.5 and 0.6 N·m to maintain water
and dust resistance. If the tightening torque exceeds the specified range or the tightening is not
even, deformation of the front panel may occur. Make sure the panel is not dirty or warped, that
the front surface is smooth, and that the panel is strong enough to hold the NA Unit.
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