Chapter 2
Hardware Overview of the NI PXI-7831R
2-22
ni.com
through areas with large magnetic fields or high electromagnetic
interference.
•
Route signals to the device carefully. Keep cabling away from noise
sources. The most common noise source in a PXI DAQ system is the
video monitor. Separate the monitor from the analog signals as much
as possible.
The following recommendations apply for all signal connections to the
NI PXI-7831R:
•
Separate NI PXI-7831R signal lines from high-current or high-voltage
lines. These lines can induce currents in or voltages on the
NI PXI-7831R signal lines if they run in parallel paths at a close
distance. To reduce the magnetic coupling between lines, separate
them by a reasonable distance if they run in parallel, or run the lines at
right angles to each other.
•
Do
not
run signal lines through conduits that also contain power lines.
•
Protect signal lines from magnetic fields caused by electric motors,
welding equipment, breakers, or transformers by running them through
special metal conduits.
Refer to the NI Developer Zone tutorial,
Field Wiring and Noise
Considerations for Analog Signals
, at
ni.com/zone
for more information.
