Wiring Precautions - Mitsubishi Electric MELSEC-Q Series User Manual

[WIRING PRECAUTIONS]

● Shut off the external power supply for the system in all phases before wiring.
Failure to do so may result in electric shock or damage to the product.
● After 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 and LG terminals to the protective ground conductor
dedicated to the programmable controller.
Failure to do so may result in electric shock or malfunction.
● Use applicable solderless terminals and tighten them with the specified torque
range. If any solderless terminal is used, it may be disconnected when the
terminal 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 wiring
may cause a fire or failure.
● Do not connect multiple power supply modules to one module in parallel. The
power supply modules may be heated, resulting in a fire or failure.
● Connectors for external connection must be crimped or pressed with the tool
specified by the manufacturer, or must be correctly soldered.
Incomplete connections could result in short circuit, fire or malfunction.
● Tighten the terminal screws within the specified torque range.
Undertightening can cause short circuit, fire, or malfunction.
Overtightening can damage the screw and/or module, resulting in drop, short
circuit, or malfunction.
● Prevent foreign matter such as dust or wire chips from entering the module.
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 during wiring.
Do not remove the film during wiring.
Remove it for heat dissipation before system operation.
WARNING
CAUTION
A-5