3-1SectionInstallation
16
Note On
unpacking the NT21 check the external appearance and confirm that there is
no
damage. Also confirm that there is no abnormal noise on shaking
the PT light
-
ly.
3-1 Installation
Install the NT21 in the operation panel and connect the power to the NT21 as
described below.
3-1-1 Installation Environment
Observe the following points when installing the PT in an operation panel.
Note 1. Do not install the NT21 at sites subject to the following conditions.
Otherwise the product may malfunction.
• Severe temperature variations
• Temperatures
or humidities outside the ranges stated in the specifications
• High humidity, condensation
• Splashing chemical agents
• Severe oil splashing
• Corrosive or flammable gases
• Strong vibrations or shocks
• Direct exposure to wind and rain (outdoor sites)
• Strong ultra-violet irradiation
2. Take
adequate measures to ensure shielding if the NT21
is used at a loca
-
tion subject to any of the following conditions. Otherwise the product may
malfunction.
• Static electricity, or noise from other equipment
• Strong electromagnetic fields
• Nearby power cables
• Potential exposure to radioactivity
3-1-2 Installation in the Operation Panel
The NT21 is mounted in an operation panel by embedding it in the panel.
Use
the
panel fittings and tool (Philips screwdriver) included in the product pack
-
age and follow the procedure below.
1, 2, 3... 1. Open a hole of the dimensions shown below in the panel and install the
NT21 from the front side of the panel.
100.5
+0.5mm
0mm
178.5
+0.5mm
0mm
2. Attach
the panel
fittings at the four positions at top and bottom, shown be
-
low, from the rear of the NT21.
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