cFP-DI-304
8
ni.com
•
For Compact FieldPoint, you
must
connect the protective earth
(PE) ground terminal on the cFP-BP-
x
backplane to the system
safety ground. The backplane PE ground terminal has the
following symbol stamped beside it:
. Connect the
backplane PE ground terminal to the system safety ground
using 14 AWG (1.6 mm) wire with a ring lug. Use the 5/16 in.
panhead screw shipped with the backplane to secure the ring
lug to the backplane PE ground terminal.
•
As with any hazardous voltage wiring, make sure that all
wiring and connections meet applicable electrical codes and
commonsense practices. Mount terminal bases and backplanes
in an area, position, or cabinet that prevents accidental or
unauthorized access to wiring that carries hazardous voltages.
•
Do
not
use the cFP-DI-304 as the only isolating barrier
between human contact and working voltages higher than
250 V
rms
.
•
Operate the cFP-DI-304 only at or below Pollution Degree 2.
Pollution Degree 2 means that only nonconductive pollution
occurs in most cases. Occasionally, however, temporary
conductivity caused by condensation must be expected.
•
Operate the cFP-DI-304 at or below Measurement Category II.
Measurement Category II is for measurements performed on
circuits directly connected to the low-voltage installation.
This category refers to local-level distribution, such as that
provided by a standard wall outlet.
Safety Guidelines for Hazardous Locations
The cFP-DI-304 is suitable for use in Class I, Division 2, Groups
A, B, C, D, T4 hazardous locations; Class I, Zone 2, AEx nC IIC
T4 and Ex nC IIC T4 hazardous locations; and nonhazardous
locations only. Follow these guidelines if you are installing the
cFP-DI-304 in a potentially explosive environment. Failing to
follow 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.
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