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[Installation Precautions]
• Use the PLC in an environment that meets the general specifications contained in the CPU
User's Manual.
Using this PLC in an environment outside the range of the general specifications may cause
electric shock, fire, malfunction, and damage to or deterioration of the product.
• When installing the module, securely insert the module fixing tabs into the mounting holes of the
base module while pressing the installation lever located at the bottom of the module downward.
Improper installation may result in malfunction, breakdown or the module coming loose and
dropping. Securely fix the module with screws if it is subject to vibration during use.
• Tighten the screws within the range of specified torque.
If the screws are loose, it may cause the module to fallout, short circuits, or malfunction.
If the screws are tightened too much, it may cause damage to the screw and/or the module,
resulting in fallout, short circuits or malfunction.
• Switch all phases of the external power supply off when mounting or removing the module.
Not ding so may cause electric shock or damage to the module.
The system that uses the QnPHCPU allows you to change a module online. Note that there are
restrictions on the modules that can be changed online and each module has a predetermined
changing procedure. For details, refer to the chapter of online module change in this manual.
• Do not directly touch the conductive area or electronic components of the module.
Doing so may cause malfunction or failure in the module.
[Wiring Precautions]
• Be careful not to let foreign matters such as sawdust or wire chips get inside the module.
They may cause fires, failure or malfunction.
• The top surface of the module is covered with protective film to prevent foreign objects such as
cable offcuts from entering the module when wiring.
Do not remove this film until the wiring is complete.
Before operating the system, be sure to remove the film to provide adequate heat ventilation.
• Be sure to fix communication cables or power supply cables leading from the module by placing
them in the duct or clamping them.
Cables not placed in the duct or without clamping may hang or shift, allowing them to be
accidentally pulled, which may cause a module malfunction and cable damage.
• Do not grab on the cable when removing the communication or power cable connected to the
module.
When disconnecting a cable without a connector, first loosen the screws on the part that is
connected to the module.
Pulling the cable when it is still connected to the module may cause damage to the module or
cable, or misoperation due to cable contact failure.
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CAUTION
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CAUTION
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