Mitsubishi FX3U Series User Manual

(3)
Safety Precautions
(Read these precautions before use.)
3. WIRING PRECAUTIONS
Reference
• Connect the AC power supply to the dedicated terminals specified in this manual.
If an AC power supply is connected to a DC input/output terminal or DC power supply terminal, the
PLC will burn out.
• Cut off all phases of the power supply externally before installation or wiring work in order to avoid
damage to the product or electric shock.
• 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.
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Reference
• 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 Ω or less) to the grounding terminal on the
main unit and extension units with a wire 2 mm
2
or thicker.
Do not use common grounding with heavy electrical systems (refer to Section 9.4).
• Connect the DC power supply wiring to the dedicated terminals described in this manual.
If an AC power supply is connected to a DC input/output terminal or DC power supply terminal, the
PLC will burn out.
• 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
0N/FX2N/FX3U Series extension equipment to the main unit 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.
• Observe the following items when wiring to the European terminal board.
Failure to do so may cause electric shock, a short-circuit, disconnection, 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 the FX Series terminal blocks in accordance with the precautions below
in order to prevent 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.
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Mitsubishi FX3U Series Specifications

General

Brand	Mitsubishi
Model	FX3U Series
Category	Controller
Language	English