Chapter 3
Signal Connections
© National Instruments Corporation
3-27
AT-MIO-16 User Manual
The mating connector for the AT-MIO-16 is a 50-position polarized, ribbon-socket connector
with strain relief. National Instruments uses a polarized, keyed connector to prevent inadvertent
upside-down connection to the AT-MIO-16. Recommended manufacturer part numbers for this
mating connector are as follows:
•
Electronic Products Division/3M (part number 3425-7650)
•
T&B/Ansley Corporation (part number 609-5041CE)
The following are standard 50-conductor, 28 AWG, stranded ribbon cables that work with these
connectors:
•
Electronic Products Division/3M (part number 3365/50)
•
T&B/Ansley Corporation (part number 171-50)
In making your own cabling, you may decide to shield your cables. The following guidelines
may help:
•
For the analog input signals, shielded twisted-pair wires for each analog input pair yield the
best results, assuming that you use differential inputs. Tie the shield for each signal pair to
the ground reference at the source.
•
Route the analog lines, pins 1 through 23, separately from the digital lines, pins 24
through 50.
•
When using a cable shield, use separate shields for the analog and digital halves of the cable.
Failure to do so will result in noise from switching digital signals coupling into the analog
signals.