Mitsubishi FX3G SERIES User Manual page 5

• Do not supply power to the [24+] and [24V] terminals (24V DC service power supply) on the main unit or extension
units.
Doing so may cause damage to the product.
• Perform class D grounding (grounding resistance: 100
extension units with a wire 2 mm
Do not use common grounding with heavy electrical systems (refer to Section 9.3).
• Do not wire vacant terminals externally.
Doing so may damage the product.
• When drilling screw holes or wiring, make sure cutting or wire debris does not enter the ventilation slits.
Failure to do so may cause fire, equipment failures or malfunctions.
• Make sure to properly wire the FX
precautions.
Failure to do so may cause electric shock, a short-circuit, wire breakage, or damage to the product.
- The disposal size of the cable end should follow the dimensions described in this manual.
- Tightening torque should be between 0.5 and 0.8 N•m.
• Make sure to properly wire to the European terminal board in accordance with the following precautions.
Failure to do so may cause electric shock, a short-circuit, wire breakage, or damage to the product.
- The disposal size of the cable end should follow the dimensions described in this manual.
- Tightening torque should be between 0.22 and 0.25 N•m.
- 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 properly wire to the FX Series terminal blocks in accordance with the following precautions.
Failure to do so may cause electric shock, a short-circuit, wire breakage, or damage to the product.
- The disposal size of the cable end should follow the dimensions described in this manual.
- Tightening torque should be between 0.5 and 0.8 N•m.
4. STARTUP AND MAINTENANCE PRECAUTIONS
• Do not touch any terminal while the PLC's power is on.
Doing so may cause electric shock or malfunctions.
• Before cleaning or retightening terminals, cut off all phases of the power supply externally.
Failure to do so may cause electric shock.
• Make sure to connect the battery for memory backup correctly.
Do not charge, disassemble, heat, short-circuit, or expose the battery to fire.
Doing so may rupture or ignite it.
• Before modifying or disrupting the program in operation or running the PLC, carefully read through this manual and
the associated manuals and ensure the safety of the operation.
An operation error may damage the machinery or cause accidents.
• Do not change the program in the PLC from two or more peripheral equipment devices at the same time. (i.e. from
a programming tool and a GOT)
Doing so may cause destruction or malfunction of the PLC program.
• Turn off the power to the PLC before attaching or detaching the memory cassette. If the memory cassette is
attached or detached while the PLC's power is on, the data in the memory may be destroyed, or the memory
cassette may be damaged.
• Do not disassemble or modify the PLC.
Doing so may cause fire, equipment failures, or malfunctions.
For repair, contact your local Mitsubishi Electric distributor.
• Turn off the power to the PLC before connecting or disconnecting any extension cable.
Failure to do so may cause equipment failures or malfunctions.
• Turn off the power to the PLC before attaching or detaching the following devices.
Failure to do so may cause equipment failures or malfunctions.
- Peripheral devices, expansion boards, and special adapters
- Extension units/blocks and FX Series terminal blocks
- Battery and memory cassette
Safety Precautions
(Read these precautions before using.)
or less) to the grounding terminal on the main unit and
2
or thicker.
/FX Series extension equipment in accordance with the following
2N 3U
(3)
Reference
83
104
117
141
144
149
152
154
189
210
313
322
Reference
164
267
345
Reference
164
267
335
345