Wiring Precautions - Mitsubishi Electric QJ71DN91 User Manual

[INSTALLATION PRECAUTIONS]
 Use the programmable controller in an environment that meets the general specifications
contained in the User's Manual of the CPU module used.
Using it in an environment that does not meet them may result in an electric shock, fire,
malfunction, and damage to or deterioration of the product.

While pressing the installation lever on the lower part of the module, insert the module fixing
projection into the hole in the base unit. Then, securely mount the module.
Incorrect module mounting may cause the module to malfunction, fail or fall off.
Secure the module with screws especially when it is used in an environment where constant
vibrations may occur.
 Tighten the screws within the specified torque range.
If the screws are loose, it may cause falling, short circuits, or malfunction.
If the screws are tightened too much, it may cause damage to the screw and /or the module,
resulting in falling, short circuits or malfunction.
 Before mounting/dismounting the module, be sure to shut off all phases of the external power
supply used by the system. Failure to do so may cause product damage.
 Do not directly touch the conductive area or electric components of the module.
Doing so may cause malfunction or failure in the module.

[WIRING PRECAUTIONS]

 Before installation or wiring, shut off all phases of the external power supply used in the system.
Failure to do so may cause an electric shock, damage to the product or malfunction.
 Be careful to prevent foreign matter such as dust or wire chips from entering the module.
It may cause a fire, failure or malfunction.
 The module has an ingress prevention label on its top to prevent foreign matter, such as wire
chips, from entering the module during wiring. Do not peel this label during wiring. Remove it for
heat dissipation before system operation.
 Place the communication cables and power cables connected to the module in a duct or clamp
them.
Otherwise, dangling cables may swing or inadvertently be pulled, resulting in damage to the
module or cables or malfunctions due to poor cable contact.
 Do not pull the cable part when disconnecting the cable from the module. To disconnect a cable
with connector, hold the connector that is plugged into the module. To disconnect a cable
without connector, loosen the screws used for fastening.
Pulling the cable that is still connected to the module may damage the module and/or cable, or
cause a malfunction due to poor contact.
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CAUTION
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WARNING
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CAUTION
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