Справочник Пользователя для National Instruments NI 6013
Chapter 4
Connecting Signals
© National Instruments Corporation
4-3
Table 4-2. Signal Descriptions for I/O Connector Pins
Signal Name
Reference
Direction
Description
AIGND
—
—
Analog Input Ground—These pins are the bias current
return point for AI measurements. Refer to Figure 4-3
for recommended connections. All three ground
references—AIGND, AOGND, and DGND—are connected
on the device.
return point for AI measurements. Refer to Figure 4-3
for recommended connections. All three ground
references—AIGND, AOGND, and DGND—are connected
on the device.
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<i, i+8> (i = 0..7), 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.
AISENSE must be connected to AIGND directly or to an
external ground reference for single-ended measurements.
Invalid random readings result if AISENSE is left
unconnected when using NRSE mode. Refer to Figure 4-3
for recommended connections.
for any of channels ACH<0..15> in NRSE configuration.
AISENSE must be connected to AIGND directly or to an
external ground reference for single-ended measurements.
Invalid random readings result if AISENSE is left
unconnected when using NRSE mode. Refer to Figure 4-3
for recommended connections.
DAC0OUT
1
AOGND
Output
Analog Channel 0 Output—This pin supplies the voltage
output of AO channel 0.
output of AO channel 0.
DAC1OUT
1
AOGND
Output
Analog Channel 1 Output—This pin supplies the voltage
output of AO channel 1.
output of AO channel 1.
AOGND
—
—
Analog Output Ground—The AO voltages are referenced to
this node. All three ground references—AIGND, AOGND,
and DGND—are connected on the device.
this node. All three ground references—AIGND, AOGND,
and DGND—are connected on the device.
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 the device.
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 the device.
DIO<0..7>
DGND
Input
Output
Digital I/O Signals—DIO6 and 7 can control the up/down
signal of general-purpose counters 0 and 1, respectively.
signal of general-purpose counters 0 and 1, respectively.
+5V
DGND
Output
+5 VDC Source—These pins are fused for up to 1 A of
+5 V supply. The fuse is self-resetting.
+5 V supply. The fuse is self-resetting.
SCANCLK
DGND
Output
Scan Clock—This pin pulses once for each A/D conversion
in scanning mode when enabled. The low-to-high edge
indicates when the input signal can be removed from the
input or switched to another signal.
in scanning mode when enabled. The low-to-high edge
indicates when the input signal can be removed from the
input or switched to another signal.
EXTSTROBE*
DGND
Output
External Strobe—This output can be toggled under software
control to latch signals or trigger events on external devices.
control to latch signals or trigger events on external devices.