NI 9426 Operating Instructions and Specifications 4 ni.com
Ex nA IIC T4 hazardous locations; and nonhazardous locations
only. Follow these guidelines if you are installing the NI 9426 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.
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 system
inan enclosure rated to at least IP 54 as defined by
IEC60529 and EN 60 529.
Caution For Zone 2 applications, install a protection
device that prevents the Vsup voltage from exceeding
42V if there is a transient overvoltage condition.