National Instruments NI USB-9421 用户手册

© National Instruments Corporation

Operating humidity
(IEC 60068-2-56) ................................... 10 to 90% RH, noncondensing

Storage humidity
(IEC 60068-2-56) ................................... 5 to 95% RH, noncondensing

Maximum altitude .................................. 2,000 m 

Pollution Degree (IEC 60664) ............... 2

This product is designed to meet the requirements of the following 
standards of EMC for electrical equipment for measurement, control, 
and laboratory use:

•

EN 61326 EMC requirements; Minimum Immunity

•

EN 55011 Emissions; Group 1, Class A

•

CE, C-Tick, ICES, and FCC Part 15 Emissions; Class A

For EMC compliance, operate this device with double-shielded cables.

This product meets the essential requirements of applicable European 
Directives, as amended for CE marking, as follows:

•

2006/95/EC; Low-Voltage Directive (safety)

•

2004/108/EC; Electromagnetic Compatibility Directive (EMC)

Refer to the Declaration of Conformity (DoC) for this product for any additional 

regulatory compliance information. To obtain the DoC for this product, visit 

ni.com/certification

, search by model number or product line, and click the 

appropriate link in the Certification column.

National Instruments is committed to designing and manufacturing 
products in an environmentally responsible manner. NI recognizes that 
eliminating certain hazardous substances from our products is beneficial 
not only to the environment but also to NI customers.

For additional environmental information, refer to the NI and the 
Environment Web page at 

ni.com/environment

. This page contains the 

environmental regulations and directives with which NI complies, as well 
as other environmental information not included in this document.