NI 9792 WSN Real-Time Gateway User Guide and Specifications
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Memory
Non-volatile ...........................................................2 GB
Use the following formula to determine the minimum life span in years of the nonvolatile memory:
Memory life span in years =
Amount of memory in NI 9792 (MB)
×
100,000/365 days]/[
file size (MB)
×
write rate (per day)
]
DRAM ...................................................................256 MB
Internal Real-Time Clock
Accuracy ................................................................200 ppm; 35 ppm at 25 °C
Integrated Voltage Input Monitor
The integrated voltage input monitor under reports the voltage at the power connector by up to 400 mV
because of voltage drops across internal circuits.
Power Requirements
Caution
You must use a UL Listed ITE power supply marked LPS with the NI 9792. The power
supply must also meet any safety and compliance requirements for the country of use.
Recommended power supply .................................15 W secondary, 35 VDC max
Power consumption................................................9.5 W
Maximum power consumption ..............................15 W
Voltage requirement
On powerup....................................................9 to 35 V
After powerup ................................................6 to 35 V
Note
For EMC compliance, operate this device with shielded cables. The NI 9792 is guaranteed to
power up when 9 V is applied to V and C. After power up, it can operate on as little as 6 V.
Physical Characteristics
If you need to clean the NI 9792, wipe it with a dry towel.
Screw-terminal wiring ...........................................12–18 AWG shielded copper conductor wire with 10
mm (0.39 in.) of insulation stripped from the end
Torque for screw terminals ....................................0.5 to 0.6 N · m
(4.4 to 5.3 lb · in.)
Weight ....................................................................Approx. 833 g (29.4 oz)
Weight with antenna .............................................Approx. 842 g (29.7 oz)
Dimensions ............................................................Refer to Figure 3 for device dimensions.
Safety Standards
Note
For UL and other safety certifications, refer to the product label, or go to
ni.com/
certification
, search by model number or product line, and click the appropriate link in the
Certification column.
