National Instruments NI 9375 Getting Started Manual page 6

Special Conditions for Hazardous Locations Use in
Europe and Internationally
The NI 9375 has been evaluated as Ex nA IIC T4 Gc equipment
under DEMKO Certificate No. 07 ATEX 0626664X and is
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Do not disconnect I/O-side wires or
Caution
connectors unless power has been switched off or the
area is known to be nonhazardous.
Do not remove modules unless power has
Caution
been switched off or the area is known to be
nonhazardous.
Substitution of components may impair
Caution
suitability for Class I, Division 2.
For Division 2 and Zone 2 applications,
Caution
install the system in an enclosure rated to at least IP54
as defined by IEC/EN 60079-15.
For Division 2 and Zone 2 applications,
Caution
install a protection device between any two terminals.
The device must prevent the Vsup-to-COM voltage
from exceeding 42 V if there is a transient overvoltage
condition.
NI 9375 Getting Started Guide | © National Instruments | 5