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Chapter 4 Signal Connections
National Instruments Corporation 4-3 VXI-MIO Series User Manual
I/O Connector Signal Descriptions
Signal Name
Reference Direction Description
AIGND
— — Analog Input Ground—These pins are the reference point
for single-ended measurements and the bias current return
point for differential measurements. All three ground
references—AIGND, AOGND, and DGND—are connected
together on your VXI-MIO Series module.
ACH<0..15> AIGND Input Analog Input Channels 0 through 15—Each channel pair,
ACH<
i,
i
+8> (
i
= 0..7), can be configured as either one
differential input or two single-ended inputs.
ACH<16..63> AIGND Input Analog Input Channels 16 through 63—Each channel pair,
ACH<
i
,
i
+8> (
i
= 16..23, 32..39, 48..55), can be configured
as either one differential input or two single-ended inputs.
AISENSE AIGND Input Analog Input Sense—This pin serves as the reference node
for any of channels ACH <0..15> in NRSE configuration.
AISENSE2 AIGND Input Analog Input Sense—This pin serves as the reference node
for any of channels ACH <16..63> in NRSE configuration.
DAC0OUT AOGND Output Analog Channel 0 Output—This pin supplies the voltage
output of analog output channel 0.
DAC1OUT AOGND Output Analog Channel 1 Output—This pin supplies the voltage
output of analog output channel 1.
EXTREF AOGND Input External Reference—This is the external reference input for
the analog output circuitry. This pin is
not
available on the
VXI-MIO-64XE-10.
AOGND — — Analog Output Ground—The analog output voltages are
referenced to this node. All three ground references—
AIGND, AOGND, and DGND—are connected together on
your VXI-MIO Series module.
DGND — — Digital Ground—This pin supplies the reference for the
digital signals at the I/O connector as well as the +5 VDC
supply. All three ground references—AIGND, AOGND,
and DGND—are connected together on your
VXI-MIO Series module.
DIO<0..7> DGND Input or
Output
Digital I/O signals—DIO6 and 7 can control the up/down
signal of general-purpose counters 0 and 1, respectively.
+5 V DGND Output +5 VDC Source—These pins are fused for up to 1 A of
+5 V supply. The circuit breaker is self-resetting.