FP-AI-100
6
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Isolation and Safety Guidelines
Caution
Before you connect any circuits that may
contain hazardous voltages to the FP-AI-100, read the
following information.
This section describes the isolation of the FP-AI-100 and its
compliance with international safety standards. The field wiring
connections are isolated from the backplane provided by the
terminal base with an optical and galvanic isolation barrier
designed and tested to provide protection against fault voltages of
up to 2,500 Vrms. In addition, the FP-AI-100 provides double
insulation (compliant with IEC 1010-1) for working
common-mode voltages of 250 Vrms. Safety standards (such as
those published by UL and IEC) require the use of double
insulation between hazardous voltages and any human-accessible
parts or circuits.
Never try to use any isolation product between human-accessible
parts (such as DIN rails or monitoring stations) and circuits that
may be at hazardous potentials under normal conditions, unless the
product is specifically designed for such an application, as is the
FP-AI-100.
When you use a product like the FP-AI-100 in applications with
hazardous potentials, follow these guidelines to make sure your
total system is safe:
•
The safety isolation of the FP-AI-100 is from input to output,
not between channels on the same module. 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
common sense 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-AI-100 is certified as double-insulated
for normal operating voltages of 250 Vrms. Do not use the
FP-AI-100 as the only isolating barrier between human contact
and working voltages of more than 250 Vrms.
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