©
National Instruments Corp.
3
NI 9421/9423
Safety Guidelines
Operate the NI 9421/9423 only as described in these operating
instr
u
ctions.
Hot Surface
This icon denotes that the component may be
hot. To
u
ching this component may res
u
lt in bodily inj
u
ry.
Safety Guidelines for Hazardous Voltages
Yo
u
can connect hazardo
u
s voltages to the NI 9421/9423 with
screw terminal only. Do
not
connect hazardo
u
s voltages to the
NI 9421 with DSUB.
If hazardo
u
s voltages are connected to the mod
u
le, take the
following preca
u
tions. A hazardo
u
s voltage is a voltage greater
than 42.4 V
pk
or 60 VDC to earth gro
u
nd.
Caution
Ens
u
re that hazardo
u
s voltage wiring is
performed only by q
u
alified personnel adhering to local
electrical standards.
Caution
Do
not
mix hazardo
u
s voltage circ
u
its and
h
u
man-accessible circ
u
its on the same mod
u
le.
