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Signal Name
+ACH<0..3>
ACH<0..3>
AIGND
+DAC0OUT
DAC0OUT
+DAC1OUT
DAC1OUT
AOGND
+5 V
DGND
© National Instruments Corporation
Table 4-1. Analog I/O Connector Pin Assignment
Reference
Direction
AIGND
Input
AIGND
Input
—
—
Output
DAC0OUT
+DAC0OUT
Output
Output
DAC1OUT
+DAC1OUT
Output
—
—
DGND
Output
—
—
Description
+Analog Input Channel 0 through 3—The PCI-4451 uses
+ACH<0..1> and the PCI-4452 uses +ACH<0..3>.
Analog Input Channel 0 through 3—The PCI-4451 uses
ACH<0..1> and the PCI-4452 uses ACH<0..3>.
Analog Input Ground—These pins are the reference point for
single-ended measurements in SE configuration and the bias
current return point for differential measurements. All three
ground references—AIGND, AOGND, and DGND—are
connected together on your PCI-4451/4452 device, but each
serves a separate purpose.
+Analog Output Channel 0—This pin supplies the analog
non-inverting output channel 0. This pin is available only on
the PCI-4451.
Analog Output Channel 0—This pin supplies the analog
inverting output channel 0. This pin is available only on the
PCI-4451.
+Analog Output Channel 1—This pin supplies the analog
non-inverting output channel 1. This pin is only available on
the PCI-4451.
Analog Output Channel 1—This pin supplies the analog
inverting output channel 1. This pin is only available on the
PCI-4451.
Analog Output Ground—The analog output voltages are
ultimately referenced to this node. All three ground
references—AIGND, AOGND, and DGND—are connected
together on your PCI-4451/4452 device, but each serves a
separate purpose.
+5 VDC Source—These pins are fused for up to 0.5 A and
supply power to the DSA signal conditioning accessories.
The fuse is self resetting.
Digital Ground—This pin supplies the reference for the +5
VDC supply. All three ground references—AIGND, AOGND,
and DGND—are connected together on your PCI-4451/4452
device, but each serves a separate purpose.
4-3
Chapter 4
Signal Connections
PCI-4451/4452 User Manual
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