National Instruments pci-6110e-6111e 用户手册

Chapter 4

Signal Connections

 National Instruments Corporation

4-3

Table 4-1.  Signal Descriptions for I/O Connector Pins

ACH <0..3> GND

—

—

Analog Input Channels 0 through 3 ground—These pins are 
the bias current return point for differential measurements. 
ACH <2..3> GND signals are no connects on the 
PCI-6111E.

ACH<0..3> +

ACH <0..3>
GND

Input

Analog Input Channels 0 through 3 (+)—These pins are 
routed to the (+) terminal of the respective channel’s 
amplifier. ACH <2..3> + signals are no connects on the 
PCI-6111E.

ACH<0..3> –

ACH <0..3>
GND

Input

Analog Input Channels 0 through 3 (–)—These pins are 
routed to the (–) terminal of the respective channel’s 
amplifier. ACH <2..3> – signals are no connects on the 
PCI-6111E.

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.

AOGND

—

—

Analog Output Ground—The analog output voltages are 
referenced to this node.

DGND

—

—

Digital Ground—This pin supplies the reference for the 
digital signals at the I/O connector as well as the +5 VDC 
supply.

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 fuse is self-resetting.

SCANCLK

DGND

Output

Scan Clock—This pin pulses once for each A/D conversion 
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. 

PCI_E.book  Page 3  Thursday, June 25, 1998  12:55 PM