Chapter 4
Connecting Signals
©
National Instruments Corporation
4-5
PFI8/GPCTR0_SOURCE
DGND
Input
Output
PFI8/Counter 0 Source—As an input, this signal is a PFI.
As an output, this signal is the GPCTR0_SOURCE signal.
This signal reflects the actual source connected to the
general-purpose counter 0.
PFI9/GPCTR0_GATE
DGND
Input
Output
PFI9/Counter 0 Gate—As an input, this signal is a PFI.
As an output, this signal is the GPCTR0_GATE signal.
This signal reflects the actual gate signal connected to the
general-purpose counter 0.
GPCTR0_OUT
DGND
Output
Counter 0 Output—This output is from the general-purpose
counter 0 output.
FREQ_OUT
DGND
Output
Frequency Output—This output is from the frequency
generator output.
*
Indicates that the signal is active low.
1
Not available on the NI 6013.
Table 4-3.
I/O Signal Summary for the NI 6013/6014
Signal Name
Signal
Type and
Direction
Impedance
Input/
Output
Protection
(Volts)
On/Off
Source
(mA at V)
Sink
(mA
at V)
Rise
Time
(ns)
Bias
ACH<0..15>
AI
100 G
Ω
in
parallel
with
100 pF
25/15
—
—
—
±200 pA
AISENSE
AI
100 G
Ω
in
parallel
with
100 pF
25/15
—
—
—
±200 pA
AIGND
AO
—
—
—
—
—
—
DAC0OUT
(NI 6014only)
AO
0.1
Ω
Short-circuit
to ground
5 at 10
5 at
–10
4
V/
µ
s
—
DAC1OUT
(NI 6014 only)
AO
0.1
Ω
Short-circuit
to ground
5 at 10
5 at
–10
4
V/
µ
s
—
AOGND
AO
—
—
—
—
—
—
DGND
DO
—
—
—
—
—
—
V
CC
DO
0.1
Ω
Short-circuit
to ground
1A fused
—
—
—
Table 4-2.
Signal Descriptions for I/O Connector Pins (Continued)
Signal Name
Reference
Direction
Description