National Instruments cFP-PWM-520 用户手册

© National Instruments Corp.

The cFP-PWM-520 is suitable for use in Class I, Division 2, 
Groups A, B, C, D, T4 hazardous locations; Class I, Zone 2, 
AEx nC IIC T4 and Ex nC IIC T4 hazardous locations; and 
nonhazardous locations only. Follow these guidelines if you are 
installing the cFP-PWM-520 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 Compact 

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

For Zone 2 applications, install a protection 

device across the external power supply and the COM 
terminal. The device must prevent the external power 
supply voltage from exceeding 42 V if there is a transient 
overvoltage condition.

The cFP-PWM-520 has been evaluated as EEx nC IIC T4 
equipment under DEMKO Certificate No. 03 ATEX 0251502X. 
Each module is marked 

 II 3G and is suitable for use in Zone 2 

hazardous locations.