National Instruments NI 9472 - Manual (Page 23)

© National Instruments Corp. 23 NI 9472/9474
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.
Caution Do not connect the NI 9472 with DSUB to
signals or use for measurements within Measurement
Categories II, III, or IV.
Safety Standards
This product is designed to meet the requirements of the following
standards of safety for electrical equipment for measurement,
control, and laboratory 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 module number or product line, and click the
appropriate link in the Certification column.