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10
LOADING AND INSTALLATION
10.3 Wiring
10.3.1 Wiring precautions
10 - 19
9
EMC AND LOW
VOLTAGE
DIRECTIVES
10
LOADING AND
INSTALLATION
11
MAINTENANCE AND
INSPECTION
12
TROUBLESHOOTING APPENDICES INDEX
The precautions on the connection of the power cables are described below.
CAUTION
Individually ground the FG and LG terminals of the programmable con-
troller with a ground resistance of 100 or less. Failure to do so may
result in electric shock or malfunction.
Use a solderless terminal with insulation sleeve for wiring of a terminal
block.
Use up to two solderless terminals for a single terminal.
Use applicable solderless terminals and tighten them within the specified
torque range.
If any spade solderless terminal is used, it may be disconnected when a
terminal block screw comes loose, resulting in failure.
Check the rated voltage and terminal layout before wiring to the module,
and connect the cables correctly.
Connecting a power supply with a different voltage rating or incorrect wir-
ing may cause a fire or failure.
Tighten the terminal block mounting screws, terminal screws, and mod-
ule fixing screws within the specified torque range.
Undertightening of the terminal block mounting screws or terminal
screws can cause short circuit, fire, or malfunction.
Overtightening can damage the screw and/or module, resulting in drop,
short circuit, or malfunction.
Undertightening of the module fixing screws can cause drop of the mod-
ule.
Overtightening can damage the screw and/or module, resulting in drop.
Prevent foreign matter such as dust or wire chips from entering the mod-
ule.
Such foreign matter can cause a fire, failure, or malfunction.
A protective film is attached to the top of the module to prevent foreign
matter, such as wire chips, from entering the module during wiring.
Do not remove the film during wiring.
Remove it for heat dissipation before system operation.
Mitsubishi programmable controllers must be installed in control panels.
Connect the main power supply to the power supply module in the con-
trol panel through a relay terminal block.
Wiring and replacement of a power supply module must be performed by
qualified maintenance personnel with knowledge of protection against
electric shock.
(For the wiring methods, refer to Section 10.3.)