National Instruments NI PCI-6110 - Manual (Page 34)

Chapter 4 Connecting Signals
NI PCI-6110/6111 User Manual 4-4 ni.com
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
amplifier. ACH<2..3>– signals are no connects on the
NI PCI-6111.
DAC0OUT AOGND Output Analog Channel 0 Output—This pin supplies the voltage
output of AO channel 0.
DAC1OUT AOGND Output Analog Channel 1 Output—This pin supplies the voltage
output of AO channel 1.
AOGND — — Analog Output Ground—The AO 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.
PFI0/TRIG1 DGND Input
Output
PFI0/Trigger 1—As an input, this is either a PFI or the
source for the hardware analog trigger. PFI signals are
explained in the
Timing Connections section. Refer to
the Analog Trigger section of Chapter 3, Hardware
Overview , for more information about the hardware
analog trigger.
As an output, this is the TRIG1 signal. In posttrigger
DAQ sequences, a low-to-high transition indicates the
initiation of the DAQ sequence. In pretrigger
applications, a low-to-high transition indicates the
initiation of the pretrigger conversions.
PFI1/TRIG2 DGND Input
Output
PFI1/Trigger 2—As an input, this is a PFI.
As an output, this is the TRIG2 signal. In pretrigger
applications, a low-to-high transition indicates the
initiation of the posttrigger conversions. TRIG2 is not
used in posttrigger applications.
Table 4-2. Signal Descriptions for I/O Connector Pins (Continued)
Signal Name Reference Direction Description