Warnings
During Power Supply
Do not attempt to take any Unit apart.
In particular, high-voltage parts are present in the Power Supply Unit while power is
supplied or immediately after power is turned OFF
. Touching any of these parts may
result in electric shock. There are sharp parts inside the Unit that may cause injury.
Fail-safe Measures
The NX-series EtherNet/IP Unit will not start operation if an error is detected by the
self-diagnosis at startup. External safety measures must be provided to ensure safe
operation of the system in such case.
If there is interference in remote I/O communications, output status will depend on the
products that are used.
Confirm the operation that will occur when there is interference in communications,
and implement safety measures.
Correctly set all of the settings in the remote I/O and Units.
Unintended outputs may occur when an error occurs in variable memory. As a counter-
measure for such problems, external safety measures must be provided to ensure safe
operation of the system.
Provide measures in the communications system and user program to ensure safety in
the overall system even if errors or malfunctions occur in data link communications.
You must take fail-safe measures to ensure safety in the event of incorrect, missing, or
abnormal signals caused by broken signal lines, momentary power interruptions, or
other causes.
Not doing so may result in serious accidents due to incorrect operation.
Security Measures
Anti-virus protection
Install the latest commercial-quality antivirus software on the computer connected to
the control system and maintain to keep the software up-to-date.
Safety Precautions
18
NX-series EtherNet/IP Unit User's Manual (W627)
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