NI 9478 Operating Instructions and Specifications
4
ni.com
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, install a protection
device across the external power s
u
pply and the COM
pin. The device m
u
st prevent the external power s
u
pply
voltage from exceeding 70 V if there is a transient
overvoltage condition.
Special Conditions for Hazardous Locations Use in Europe
This eq
u
ipment has been eval
u
ated as Ex nA IIC T4 eq
u
ipment
u
nder DEMKO Certificate No. 07 ATEX 0626664X. Each mod
u
le
is marked
II 3G and is s
u
itable for
u
se in Zone 2 hazardo
u
s
locations. If yo
u
are
u
sing the NI 9478 in Gas Gro
u
p IIC hazardo
u
s
locations or in ambient temperat
u
res of –40 °C
≤
Ta
≤
70 °C, yo
u
m
u
st
u
se the device in an NI chassis that has been eval
u
ated as
EEx nC IIC T4, Ex nA IIC T4, or Ex nL IIC T4 eq
u
ipment.
