Mitsubishi Electric MELSEC FX Series User Manual page 4

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.
• Use the product within the generic environment specifications described in Section 4.1 of this manual.
Never use the product in areas with excessive dust, oily smoke, conductive dusts, corrosive gas (salt air, Cl
NO ), flammable gas, vibration or impacts, or expose it to high temperature, condensation, or rain and wind.
2
• Do not touch the conductive parts of the product directly.
Doing so may cause device failures or malfunctions.
• Do not touch the conductive parts of the product directly to avoid failure or malfunctions.
• Install the product securely using a DIN rail or mounting screws.
Terminal block
Main unit, FX Series I/O extension unit/block, and FX
2N
extension block/special adapter
• 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.
• Make sure to affix the expansion board with tapping screws.
Tightening torque should follow the specifications in the manual.
Loose connections may cause 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.
• Connect the extension cables, peripheral device cables, input/output cables and battery connecting cable securely
to their designated connectors.
Loose connections may cause malfunctions.
• Connect the memory cassette, and expansion board board securely to their designated connectors.
Loose connections may cause malfunctions.
• Turn off the power to the PLC before attaching or detaching the following devices.
Failure to do so may cause device failures or malfunctions.
- Peripheral devices, expansion boards, and special adapters
- Extension units/blocks and the FX Series terminal block
- Battery and memory cassette
• Connect the memory cassette securely to the appropriate connector.
Loose connections may cause malfunctions.
Installing the cassette in a raised or tilted posture can also cause malfunctions.
3. WIRING 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.
• Make sure to attach the terminal cover, offered as an accessory, before turning on the power or initiating operation
after installation or wiring work.
Failure to do so may cause electric shock.
Safety Precautions
(Read these precautions before using.)
/FX Series special
2N 3U
(2)
, H S, SO
2 2
DIN rail only
DIN rail or direct mounting
Reference
94
340
Reference
or
2
95
341
Reference
95
117
133
166
180
217
238
341