NI 9421/9423
6
ni.com
Caution
Do
not
disconnect I/O-side wires or connectors
u
nless power has been switched off or the area is known
to be nonhazardo
u
s.
Caution
Do
not
remove mod
u
les
u
nless power has been
switched off or the area is known to be nonhazardo
u
s.
Caution
S
u
bstit
u
tion of components may impair
s
u
itability for Class I, Division 2.
Caution
For Zone 2 applications, install the system
in an enclos
u
re rated to at least IP 54 as defined by
IEC 60529 and EN 60529.
Caution
For Zone 2 applications, connected signals m
u
st
be within the following limit:
Capacitance .......................... 0.2
μ
F max
Special Conditions for Hazardous Locations Use in Europe
This eq
u
ipment has been eval
u
ated as Ex nC IIC T4
eq
u
ipment
u
nder DEMKO Certificate No. 03 ATEX 0324020X. Each mod
u
le
is marked
II 3G and is s
u
itable for
u
se in Zone 2 hazardo
u
s
locations, in ambient temperat
u
res of –40 °C
≤
Ta
≤
70 °C. If yo
u
