NI USB-9421 User Guide and Specifications 16 ni.com

NI USB-9421 with D-SUB Safety Voltages

Channel-to-COM....................................30 V max
Isolation
Channel-to-channel..........................No isolation between channels
Channel-to-earth ground
Withstand.................................1,000 Vrms, verified by a 5 second
dielectric withstand test
Continuous...............................60 VDC,
MeasurementCategory I
Measurement Category I is for measurements performed on circuits not
directly connected to the electrical distribution system referred to as
MAINS voltage. MAINS is a hazardous live electrical supply system that
powers equipment. This category is for measurements of voltages from
specially protected secondary circuits. Such voltage measurements include
signal levels, special equipment, limited-energy parts of equipment,
circuits powered by regulated low-voltage sources, and electronics.
Safety Standards
The NI USB-9421 is designed to meet the requirements of the following
standards of safety for electrical equipment for measurement, control,
andlaboratory use:
• IEC 61010-1, EN-61010-1
• UL 61010-1, CSA 61010-1
Note For UL and other safety certifications, 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.
Hazardous Locations
The NI USB-9421 is not certified for use in hazardous locations.
Environmental
The NI USB-9421 is intended for indoor use only.
Operating temperature
(IEC60068-2-1, IEC 60068-2-2)............ 0 to 60 °C
Storage temperature
(IEC60068-2-1, IEC 60068-2-2)............ –40 to 85 °C