iv Ethernet module User’s Manual
WARNING
1.Before mounting or removing the EN311, be
sure to switch power off (S controller power
and network power). Failure to do so can
cause electric shock or fire.
2.Keep the EN311 free of wire fragments and
other foreign matter to prevent fire, module
trouble, and malfunction.
3.Secure the joints of the connectors and
cables and the EN311 mounted in the base
unit with stoppers or screws to prevent them
from slipping out of place or getting
unsteady.
If they are not adequately secured, vibration,
etc. can cause trouble or malfunction.
Forbidden
1.The EN311 cannot be simultaneously
connected to 10BASE5 and 10BASE2
systems.
2.Do not connect unused network cables to
the EN311.
Failure to observe this could cause trouble
and/or malfunction.
3.Do not connect or disconnect cables when
power (T3H/MAU supply power) is on.
Failure to observe this could cause trouble
and/or malfunction.
Forbidden
3. Safety Precautions on Maintenance and inspection
Turn off power removing or connecting any
modules, boards, or devices.
Otherwise, it can cause electrical shock, or
machine damage.
Mandatory
Turn off power removing any modules after
installing.
Otherwise, exposed conductive parts of wire
or on the rear of terminal blocks can cause
electrical shock.
Mandatory
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