National Instruments NI-9147 Getting Started page 4

NI-9147 in a potentially explosive environment. Not following these guidelines may
result in serious injury or death.
Caution
the controller unless power has been switched off.
Caution
been switched off or the area is known to be nonhazardous.
Caution
the area is known to be nonhazardous.
Caution
Division 2, or Zone 2.
Caution
intended hazardous (classified) location, having a tool secured cover/door,
where a minimum protection of at least IP54 is provided.
Special Conditions for Hazardous Locations Use in Europe and
Internationally
The NI-9147 has been evaluated as Ex nA IIC T4 Gc equipment under
DEMKO 07ATEX 0626664X and is IECEx UL 14.0089X certified. Each device is marked
II 3G and is suitable for use in Zone 2 hazardous locations, in ambient
temperatures of -40 °C ≤ Ta ≤ 70 °C.
Caution
exceeding 140% of the peak rated voltage value of 85 V at the supply
terminals to the equipment.
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Do not disconnect the power supply wires and connectors from
Do not disconnect I/O-side wires or connectors unless power has
Do not remove modules unless power has been switched off or
Substitution of components may impair suitability for Class I,
The system must be installed in an enclosure certified for the
Transient protection shall be provided that is set at a level not
NI-9147 Getting Started