Mitsubishi Electric Melsec Q Series User Manual page 4

[Design Precautions]
When the programmable controller system security needs to be protected against illegal access from
an external device via a network, take measures at the user's discretion.
Also, when it is necessary to ensure safety of the programmable controller system against
unauthorized access from any external device via the Internet, include measures such as a firewall.
Do not write any data to the "System area" in the buffer memory of the intelligent function module.
As for signals output from the programmable controller CPU to the intelligent function module, never
output (ON) a "Use prohibited" signal.
Doing these operations may cause malfunctions of the programmable controller system.
Do not bunch the control wires or communication cables with the main circuit or power wires, or
install them close to each other.
They should be installed 100 mm (3.94 inch) or more from each other.
Not doing so could result in noise that would cause erroneous operation.
During registering each setting, do not power OFF the mounted module or reset the programmable
controller CPU.
Otherwise, data in the CompactFlash card will be undefined. Therefore, resetting and re-registering
data are required.
This may also cause a module failure or malfunctions.
[Installation Precautions]
Use the programmable controller under the environment specified in the User's Manual.
Using this programmable controller in an environment outside the range of the general specifications
could result in electric shock, fire, erroneous operation, and damage to or deterioration of the
product.
To mount the module, while pressing the module mounting lever located in the lower part of the
module, fully insert the module fixing projection(s) into the hole(s) in the base unit and press the
module until it snaps into place.
Incorrect loading of the module can cause a malfunction, failure or drop.
When using the programmable controller in the environment of much vibration, tighten the module
with a screw.
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WARNING
CAUTION
CAUTION