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Chapter 4 Signal Connections
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National Instruments Corporation 4-3 PCI-4451/4452 User Manual
Table 4-1.
Analog I/O Connector Pin Assignment
Signal Name Reference Direction Description
+ACH<0..3> AIGND Input +Analog Input Channel 0 through 3—The PCI-4451 uses
+ACH<0..1> and the PCI-4452 uses +ACH<0..3>.
−ACH<0..3>
AIGND Input
−Analog Input Channel 0 through 3—The PCI-4451 uses
−ACH<0..1> and the PCI-4452 uses −ACH<0..3>.
AIGND — — 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.
+DAC0OUT
−DAC0OUT
Output +Analog Output Channel 0—This pin supplies the analog
non-inverting output channel 0. This pin is available only on
the PCI-4451.
−DAC0OUT
+DAC0OUT Output
−Analog Output Channel 0—This pin supplies the analog
inverting output channel 0. This pin is available only on the
PCI-4451.
+DAC1OUT
−DAC1OUT
Output +Analog Output Channel 1—This pin supplies the analog
non-inverting output channel 1. This pin is only available on
the PCI-4451.
−DAC1OUT
+DAC1OUT Output
−Analog Output Channel 1—This pin supplies the analog
inverting output channel 1. This pin is only available on the
PCI-4451.
AOGND — — 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 V DGND Output +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.
DGND — — 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.
User.book Page 3 Tuesday, April 14, 1998 10:20 AM