NI 9201/9221 6 ni.com
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 an d EN 60529.
Caution For Zone 2 applications, install a protection
device between the input signal and the NI 9201/9221
input terminal. The device must prevent the input
channel-to-COM voltage from exceeding 85 V if there is
a transient overvoltage condition.
Special Conditions for Hazardous Locations Use in Europe
This equipment has been evaluated as EExnC IIC T4 equipment
under DEMKO Certificate No.03 ATEX 0324020X. Each module
is marked II 3G and is suitable for use in Zone 2 hazardous