Mitsubishi Electric QJ71LP21 Reference Manual page 5

[Installation Precautions]
• Do not directly touch the conducting parts and electronic parts of the module. This may cause
the module to malfunction or fail.
[Wiring Precautions]
• Before starting wiring or similar work, be sure to shut off all phases of the external power supply
to the entire system. Failure to completely shut off the power supply to the system may cause
electric shocks and damage the product.
• Be sure to ground the FG terminals independently for PLC by class D (class 3) or higher.
Failure to do so may cause malfunctions.
• When connecting cables to the terminal block for external power supply, check the rated voltage
and terminal layout of the product for correct wiring.
Connecting a cable to power supply of different rating or incorrect wiring may cause a fire or
fault.
• Tighten the terminal screws with the specified torque.
Loose tightening may lead to a short circuit, fire or malfunction.
• Solder coaxial cable connectors properly. Incomplete soldering may result in malfunctioning.
• Be careful not to let foreign particles such as chaff and wire chips get inside the module. They
may cause a fire, mechanical breakdown or malfunction.
• The top surface of the module is covered with a protective film to prevent foreign objects such as
wire chips from entering the module during wiring work. Do not remove this film until all the
wiring work is complete. Before operating the system, be sure to remove the film to provide
adequate heat ventilation.
• Make sure to place the communication and power cables to be connected to the module in a
duct or fasten them using a clamp. If the cables are not placed in a duct or not fastened with a
clamp, their positions may become unstable and may move, or they may be pulled
inadvertently. This may damage the module and the cables or cause the module to malfunction
because of faulty cable connections.
• When disconnecting the communication and power cables from the module, do not pull the
cables by hand. When disconnecting a cable with a connector, hold the connector to the module
by hand and pull it out to remove the cable. When disconnecting a cable connected to a terminal
block, loosen the screws on the terminal block first before removing the cable. If a cable is
pulled while being connected to the module, it may cause the module to malfunction or damage
the module and cables.
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CAUTION
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DANGER
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CAUTION
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