National Instruments cFP-DO-403 用户手册

© National Instruments Corp.

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Do not use the [c]FP-DO-403 as the only isolating barrier 
between human contact and working voltages higher than 
250 V

rms

.

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Operate the [c]FP-DO-403 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.

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Operate the [c]FP-DO-403 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.

The [c]FP-DO-403 is suitable for use in Class I, Division 2, Groups 
A, B, C, D, T4 hazardous locations; Class I, Zone 2, AEx nA IIC 
T4 and Ex nA IIC T4 hazardous locations; and nonhazardous 
locations only. Follow these guidelines if you are installing the 
[c]FP-DO-403 in a potentially explosive environment. Failing to 
follow these guidelines may result in serious injury or death.

Make sure that all products you use in hazardous 

locations are certified for such use. Refer to the product 
label or visit 

ni.com/certification

, search by model 

number or product line, and click the appropriate link in 
the Certification column.

Do not disconnect I/O-side wires or connectors 

unless power has been switched off or the area is known 
to be nonhazardous.

Do not remove modules unless power has been 

switched off or the area is known to be nonhazardous.

Substitution of components may impair 

suitability for Class I, Division 2.

For Zone 2 applications, install the FieldPoint 

system in an enclosure rated to at least IP 54 as defined 
by IEC 60529 and EN 60529.