Power Requirements; Bus Interface; Physical Characteristics; Safety Voltages - National Instruments NI USB-9234 User Manual

Power Requirements

Bus Interface

Physical Characteristics

Safety
Do not connect the NI USB-9234 to signals or use for measurements within
Caution
Measurement Categories II, III, or IV.
NI USB-9234 User Guide and Specifications
Current consumption from USB.............500 mA, max
Suspend mode..................................2.5 mA, max
USB specification ...................................USB 2.0 Hi-Speed
Dimensions .............................................12.1 cm × 8.6 cm × 2.5 cm
Weight ....................................................Approx. 250 g (8.8 oz)
If you need to clean the module, wipe it with a dry towel.

Safety Voltages

Connect only voltages that are within the following limits.
Channel-to-earth ground.........................±30 V max,
Isolation
Channel-to-channel..........................No isolation between channels
Channel-to-earth ground..................No isolation between channels
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.
(4.75 in. × 3.37 in. × 0.99 in.)
Measurement Category I
and earth ground
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