Mitsubishi Electric FX3U-ENET-ADP, User Manual

Page: 4 / 162

Safety Precautions
(Read these precautions before use.)
(2)
3. WIRING PRECAUTIONS
4. STARTUP AND MAINTENANCE PRECAUTIONS
Reference
• 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
2
, H
2
S,
SO
2
, or NO
2
), flammable gas, vibration or impacts, or expose it to high temperature, condensation, or rain and
wind.
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.
• Install the product securely using a DIN rail or mounting screws.
• 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.
• 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.
• Connect the FX
3U
-ENET-ADP securely to special adapter connector.
Loose connections may cause malfunctions.
25
Reference
• Make sure to cut off all phases of the power supply externally before attempting wiring work.
Failure to do so may cause electric shock or damage to the product.
29
Reference
• Perform class D grounding (grounding resistance: 100 or less) to the grounding terminal on the FX
3U
-ENET-ADP
with a wire of cross-sectional area 0.5 to 1.5 mm
2
. Do not use common grounding with heavy electrical systems
(refer to the Section 5.1).
• 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.
• Make sure to properly wire to the terminal block (European type) in accordance with the following precautions.
Failure to do so may cause electric shock, equipment failures, a short-circuit, wire breakage, malfunctions, or
damage to the product.
-
The disposal size of the cable end should follow the dimensions described in the manual.
- Tightening torque should follow the specifications in the manual.
- Twist the end of strand wire and make sure that there are no loose wires.
- Do not solder-plate the electric wire ends.
- Do not connect more than the specified number of wires or electric wires of unspecified size.
- Affix the electric wires so that neither the terminal block nor the connected parts are directly stressed.
• 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 the shielded cable at one point on the PLC. However, do not use common
grounding with heavy electrical systems.
29
Reference
• Do not touch any terminals or connector while the PLC's power is on.
Doing so may cause electrical shock or malfunctions.
• Before cleaning or retightening screws, externally cut off all phases of the power supply.
Failure to do so may cause malfunction or failure of this adapter. When the screws are tightened insufficiently, they
may fall out and cause a shortcircuit or malfunction. When tightened too much, the screws or the adapter may be
damaged, resulting in short-circuit, or malfunction.
• When controlling the PLC (especially when changing data, the program or changing the operating conditions)
during operation, ensure that it is safe to do so.
18