Mitsubishi MELSEC iQ-F FX5UC, User Manual

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4
[WIRING PRECAUTIONS]
[WIRING PRECAUTIONS]
WARNING
●
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, provided as an accessory, before turning on the power or
initiating operation after installation or wiring work. Failure to do so may cause electric shock.
●
The temperature rating of the cable should be 80

or more.
It may differ depending on the extension devices. For details, refer to the user's manual of the
extension devices.
●
Make sure to wire the screw terminal block 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.
- Tighten the screws using a Phillips-head screwdriver No. 2 (shaft diameter 6 mm or less). Make
sure that the screwdriver does not touch the partition part of the terminal block.
●
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 ends of stranded wires 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.
CAUTION
●
Perform class D grounding (grounding resistance: 100
Ω
or less) of the grounding terminal on the
CPU module and extension modules with a wire 2 mm
2
or thicker.
Do not use common grounding with heavy electrical systems (refer to

Page 81 Grounding).
●
Connect the 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.
●
Install module so that excessive force will not be applied to terminal blocks, power connectors, I/O
connectors, communication connectors, or communication cables. Failure to do so may result in wire
damage/breakage or PLC failure.