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Safety Guidelines for Hazardous Locations
The NI cDAQ-9138/9139 chassis is suitable for use in Class I, Division 2, Groups A, B, C, D,
T4 hazardous locations; Class 1, Zone 2, AEx nA IIC T4 and Ex nA IIC T4 hazardous locations;
and nonhazardous locations only. Follow these guidelines if you are installing the
NI cDAQ-9138/9139 chassis in a potentially explosive environment. Not following these
guidelines may result in serious injury or death.
Caution
Do
not
disconnect the power supply wires and connectors from the chassis
unless power has been switched off.
Caution
Substitution of components may impair suitability for Class I, Division 2.
Caution
For Zone 2 applications, install the chassis in an enclosure rated to at least
IP 54 as defined by IEC/EN 60529.
Caution
The USB ports require the NI Industrial USB extender cable, NI part
number 152166-
xx
. The cable must be used in conduit to wire to a nonhazardous
location. Do
not
disconnect the cable unless the cDAQ-9138/9139 is powered off or
the area is known to be nonhazardous.
Special Conditions for Hazardous Locations Use in Europe
This equipment has been evaluated as Ex nA IIC T4 Gc equipment under DEMKO 12 ATEX
1202658X. Each such chassis is marked
II 3G and is suitable for use in Zone 2 hazardous
locations, in ambient temperatures of 0 °C
≤
Ta
≤
55 °C.
Caution
You
must
make sure that transient disturbances do not exceed 140% of the
rated voltage.
Caution
The chassis shall be mounted in an ATEX certified enclosure with a
minimum ingress protection rating of at least IP 54 as defined in IEC/EN 60529 and
used in an environment of not more than Pollution Degree 2.
Caution
The enclosure must have a door or cover accessible only by the use of a
tool.