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•
Make sure to observe the following precautions in order to prevent any damage to the machinery or accidents due
to abnormal data written to the PLC under the influence of noise:
1) Do not bundle the main circuit line together with or lay it close to the main circuit, high-voltage line or load line.
Otherwise, noise disturbance and/or surge induction are likely to take place. As a guideline, lay the control line
at least 100mm (3.94") or more away from the main circuit or high-voltage lines.
2) Ground the shield wire or shield of a shielded cable.
Do not use common grounding with heavy electrical systems (refer to the manual of the PLC main unit).
2. INSTALLATION PRECAUTIONS
•
Make sure to cut off all phases of the power supply externally before attempting installation or wiring work.
Failure to do so may cause electric shock or damage to the product.
•
Use the product within the generic environment specifications described in PLC main unit manual (Hardware
Edition).
Never use the product in areas with excessive dust, oily smoke, conductive dusts, corrosive gas (salt air, Cl
SO
or NO
), flammable gas, vibration or impacts, or expose it to high temperature, condensation, or rain and wind.
2
2
If the product is used in such conditions, electric shock, fire, malfunctions, deterioration or damage may occur.
•
Do not touch the conductive parts of the product directly.
Doing so may cause device failures or malfunctions.
•
When drilling screw holes or wiring, make sure that cutting and wiring debris do not enter the ventilation slits.
Failure to do so may cause fire, equipment failures or malfunctions.
•
Be sure to remove the dust proof sheet from the PLC's ventilation port when installation work is completed.
Failure to do so may cause fire, equipment failures or malfunctions.
•
Install the product on a flat surface.
If the mounting surface is rough, undue force will be applied to the PC board, thereby causing nonconformities.
•
Install the product securely using a DIN rail or mounting screws.
•
Connect extension cables securely to their designated connectors.
Loose connections may cause malfunctions.
Safety Precautions
(Read these precautions before use.)
(2)
Reference
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Reference
23
Reference
, H
S,
2
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