©
National Instruments Corp.
7
FP-DI-330
Isolation and Safety Guidelines
Caution
Read the following information before
attempting to connect ANY circuits which may contain
hazardous voltages to the FP-DI-330.
This section describes the isolation of the FP-DI-330 and its
compliance with international safety standards. The field wiring
connections of the FP-DI-330 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 3000 Vrms. In addition, the FP-DI-330 provides
double insulation (compliant to 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. You should never attempt to use any isolation product
between human accessible parts (such as DIN rails or monitoring
stations) and circuits which may be at hazardous potentials under
normal conditions, unless the product is specifically designed
(as the FP-DI-330 is) for such an application.
Even when a product like the FP-DI-330 is used in applications
with hazardous potentials, follow these guidelines to ensure a safe
total system.
•
The safety isolation of the FP-DI-330 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,
ensure 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 also isolated from human
contact.
•
As with any hazardous voltage wiring, ensure that all wiring
and connections meet with applicable electrical codes or
common sense practices. Mount terminal bases in an area,
position, or cabinet that prevents accidental or unauthorized
access to wiring with hazardous voltages.
•
The isolation of the FP-DI-330 is certified as double insulated
for normal operating voltages of 250 Vrms. Do not use the
FP-DI-330 as the sole isolating barrier between human contact
and working voltages of more than 250 Vrms.
Summary of Contents for FieldPoint FP-DI-330
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