National Instruments NI 660 Series User Manual page 6

Compliance
Electromagnetic Compatibility Information
This product was tested and complies with the regulatory requirements and limits for electromagnetic compatibility (EMC)
stated in the product specifications. These requirements and limits provide reasonable protection against harmful interference
when the product is operated in the intended operational electromagnetic environment.
This product is intended for use in industrial locations. However, harmful interference may occur in some installations, when
the product is connected to a peripheral device or test object, or if the product is used in residential or commercial areas. To
minimize interference with radio and television reception and prevent unacceptable performance degradation, install and use
this product in strict accordance with the instructions in the product documentation.
Furthermore, any modifications to the product not expressly approved by National Instruments could void your authority to
operate it under your local regulatory rules.
Caution To ensure the specified EMC performance, operate this product only with shielded cables and
accessories.
Caution To ensure the specified EMC performance, the length of all I/O cables must be no longer than 3 meters
(10 feet).
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