Mitsubishi Electric MELSEC-A Series Manual page 7

[Wiring Precautions]
● Shut off the external power supply (all phases) used in the system before wiring.
Failure to do so may result in electric shock or cause the module to fail or malfunction.
● After installation and wiring, attach the included terminal cover to the module before turning it on for
operation.
Failure to do so may result in electric shock.
● Ground the FG terminal to the protective ground conductor dedicated to the programmable
controller. Failure to do so may result in malfunction.
● Check the rated voltage and terminal layout before wiring the external power supply terminal block,
and connect the cables correctly.
Connecting a power supply with a different voltage rating or incorrect wiring may cause a fire or
failure.
● Use applicable solderless terminals and tighten them within the specified torque range. If any spade
solderless terminal is used, it may be disconnected when the terminal screw comes loose, resulting
in failure.
● Correctly solder coaxial cable connectors. Incomplete soldering may result in malfunction.
● Do not install the control lines or communication cables together with the main circuit lines or power
cables.
Failure to do so may result in malfunction due to noise.
● Place the cables in a duct or clamp them.
If not, dangling cable may swing or inadvertently be pulled, resulting in damage to the module or
cables or malfunction due to poor contact.
● Tighten the terminal screw within the specified torque range.
Undertightening can cause short circuit or malfunction.
Overtightening can damage the screw and/or module, resulting in drop, short circuit, fire, or
malfunction.
● When disconnecting the cable from the module, do not pull the cable by the cable part.
For the cable with connector, hold the connector part of the cable.
For the cable connected to the terminal block, loosen the terminal block screws.
Pulling the cable connected to the module may result in malfunction and damage to the module or
cable.
WARNING
CAUTION
A
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