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Appendix B I/O Connector
AT-MIO-16X User Manual B-4
©
National Instruments Corporation
Table B-1. Signal Connection Descriptions
68-Pin Pins 50-Pin Pins Signal Names Descriptions
24, 27, 29, 32,
56, 59, 64, 67
1-2 AI GND Analog Input Ground—These pins are the
reference point for single-ended
measurements and the bias current return
point for differential measurements.
68, 33, 65, 30,
28, 60, 25, 57,
34, 66, 31, 63,
61, 26, 58, 23
3-18 ACH<0..15> Analog Input Channels 0 through 15—In
differential mode, the input is configured for
up to eight channels. In single-ended mode,
the input is configured for up to 16 channels.
62 19 AI SENSE Analog Input Sense—This pin serves as the
reference node when the board is in NRSE
configuration. If desired, this signal can be
programmed to be driven by the board
analog input ground in the DIFF and RSE
analog input modes.
22 20 DAC0 OUT Analog Channel 0 Output—This pin
supplies the voltage output of analog
output Channel 0.
21 21 DAC1 OUT Analog Channel 1 Output—This pin
supplies the voltage output of analog
output Channel 1.
20 22 EXTREF External Reference—This is the external
reference input for the analog output
circuitry.
54, 55 23 AO GND Analog Output Ground—The analog output
voltages are referenced to this node.
4, 7, 9, 12,13,
15, 18, 35, 36,
39, 44, 50, 53
24, 33 DIG GND Digital Ground—This pin supplies the
reference for the digital signals at the I/O
connector as well as the +5 VDC supply.
52, 17, 49, 47 25, 27, 29, 31 ADIO<0..3> Digital I/O port A signals.
19, 51, 16, 48 26, 28, 30, 32 BDIO<0..3> Digital I/O port B signals.