National Instruments CFP-CB-3 - Manual (Page 14)

cFP-CB-1/2/3/4 14 ni.com
• You must connect the protective earth (PE) ground terminal on
the cFP-BP-x or cFP-180x 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 the backplane in an area,
position, or cabinet that prevents accidental or unauthorized
access to wiring that carries hazardous voltages.
• The isolation of the cFP-CB-x is certified as double-insulated
for working voltages of up to 250 V
rms
.
• Operate the cFP-CB-x only at or below Pollution Degree 2.
Pollution Degree 2 means that only nonconductive pollution
occurs in most cases. Occasionally, however, a temporary
conductivity caused by condensation must be expected.
• Do not operate FieldPoint products in an explosive atmosphere
or where there may be flammable gases or fumes. If you need
to operate FieldPoint products in such an environment, the
FieldPoint products must be in a suitably rated enclosure.
• Operate the cFP-CB-x at or below Measurement Category II.
Measurement Category II is for measurements performed on
circuits directly connected to the electrical distribution system.
This category refers to local-level distribution, such as that
provided by a standard wall outlet.