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FP-TB-10 Operating Instructions
16
ni.com
Never
try to use any isolation product between human-accessible
parts (such as DIN rails or monitoring stations) and circuits that
can be at hazardous potentials under normal conditions, unless the
product is specifically designed for such an application, as is the
FP-TB-10.
Even though the FP-TB-10 is designed to handle applications with
hazardous potentials, follow these guidelines to ensure a safe total
system:
•
The FP-TB-10 has a safety isolation barrier between the
I/O channels and the inter-module communication bus. There
is no isolation between channels unless otherwise noted. If any
of the channels on a module are wired at a hazardous potential,
make sure that all other devices or circuits connected to that
module are properly insulated from human contact.
•
Do
not
share the external supply voltages (V and C on the
terminal base) with other devices (including other FieldPoint
devices), unless those devices are isolated from human contact.
•
As with any hazardous voltage wiring, make sure that all
wiring and connections meet applicable electrical codes and
commonsense practices. Mount terminal bases in an area,
position, or cabinet that prevents accidental or unauthorized
access to wiring that carries hazardous voltages.
•
The isolation of the FP-TB-10 is certified as double-insulated
for normal operating voltages of 250 V
rms
. Do
not
use the
FP-TB-10 as the only isolating barrier between human contact
and working voltages of more than 250 V
rms
.
•
Operate the FP-TB-10 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 FP-TB-10 at or below Installation Category II.
Installation 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.