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Custom Cabling
Follow these guidelines if you want to develop your own cable.
•
Route the analog lines separately from the digital lines.
•
When using a cable shield, use separate shields for the analog and digital halves of the
cable. Failure to do so results in noise coupling into the analog signals from transient digital
signals.
Table 1-3 shows the recommended connectors to use with the I/O connector on your AO device.
Device
NI 6711/6713
NI DAQCard-6715
NI 6722/6723
NI 6731/6733
When the NI DAQCard-6715 is in the upper PCMCIA slot, you can maintain
Note
access to the adjacent slot by using an inverted VHDCI connector.
For more information on the connectors used for DAQ devices, refer to the KnowledgeBase
document, Specifications and Manufacturers for Board Mating Connectors. To access this
document, go to
ni.com/info
Field Wiring Considerations
The following recommendations apply for all signal connections to the AO Series device.
•
Separate the signal lines of the AO Series device from high-current or high-voltage lines.
These lines can induce currents in or voltages on the signal lines of the AO Series device if
they run in close parallel paths. 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 document, Field Wiring and Noise Considerations for Analog
Signals, for more information. To access this document, go to
Code
.
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Table 1-3. Recommended AO Connectors
Honda 68-position, solder cup, female connector Honda backshell
AMP 68-position, VHDCI AMP backshell
AMP 68-position, VHDCI AMP backshell
Honda 68-position, solder cup, female connector Honda backshell
and enter the info code
Analog Output Series User Manual
Connector
.
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ni.com/info
© National Instruments | 1-7
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