Chapter 2
Configuration and Installation
© National Instruments Corporation
2-51
AT-MIO-16D User Manual
The MIO-16 circuitry I/O connector is a 50-pin female ribbon-cable header. The manufacturer
part numbers for this header are as follows:
Electronic Products Division/3M
part number 3596-5002
T&B/Ansley Corporation
part number 609-5007
The mating connector for the MIO-16 circuitry is a 50-position ribbon socket connector, polarized,
with strain relief. National Instruments uses a polarized (keyed) connector to prevent inadvertent
upside-down connection to the AT-MIO-16D. 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 is the standard ribbon cable (50-conductor, 28 AWG, stranded) that can be used
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 differential inputs are used. Tie the shield for each signal pair to the
ground reference at the source.
•
The analog lines, pins 1 through 23, should be routed 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.
DIO-24 Cabling Considerations
The DIO-24 circuitry of the AT-MIO-16D can be interfaced to a wide range of printers, plotters,
test instruments, I/O racks and modules, screw terminal panels, and almost any device with a
parallel interface. The DIO-24 circuitry I/O connector is a standard 50-pin header connector. The
pin assignments are compatible with the standard 24-channel I/O module mounting racks (such as
those manufactured by Opto 22 and Gordos).
The CB-100 cable termination accessory is available from National Instruments for use with the
DIO-24 circuitry of the AT-MIO-16D. This kit includes two 50-conductor flat ribbon cables and
two 50-pin CB-50 connector blocks. Signal input and output wires can be attached to screw
terminals on the connector block and are therefore connected to the DIO-section I/O connector.
The CB-100 is useful for initial prototyping of an application or in situations where DIO-section
interconnections are frequently changed. Once you develop a final field wiring scheme, however,
you may want to develop your own cable. This section contains information and guidelines for the
design of custom cables.
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