National Instruments RS422 User Manual
© National Instruments Corp.
3
NI 9871 Operating Instructions
Safety Guidelines for Hazardous Locations
The NI 9871 is suitable for use in Class I, Division 2, Groups A, B,
C, D, T4 hazardous locations; Class I, Zone 2, AEx nA II T4 and
Ex nA II T4 hazardous locations; and nonhazardous locations only.
Follow these guidelines if you are installing the NI 9871 in a
potentially explosive environment. Not following these guidelines
may result in serious injury or death.
C, D, T4 hazardous locations; Class I, Zone 2, AEx nA II T4 and
Ex nA II T4 hazardous locations; and nonhazardous locations only.
Follow these guidelines if you are installing the NI 9871 in a
potentially explosive environment. Not following these guidelines
may result in serious injury or death.
Caution
Do not disconnect I/O-side wires or connectors
unless power has been switched off or the area is known
to be nonhazardous.
to be nonhazardous.
Caution
Do not remove modules unless power has been
switched off or the area is known to be nonhazardous.
Caution
Substitution of components may impair
suitability for Class I, Division 2.
Caution
For Zone 2 applications, install the
CompactRIO system in an enclosure rated to at least
IP 54 as defined by IEC 60529 and EN 60529.
IP 54 as defined by IEC 60529 and EN 60529.