National Instruments NI 6115/6120 User Manual page 42

Table 4-2. Signal Descriptions for I/O Connector Pins (Continued)
Signal Name
PFI8/GPCTR0_SOURCE
PFI9/GPCTR0_GATE
GPCTR0_OUT
FREQ_OUT
1
The GPCTR0_OUT acts as an input when using external clock mode with correlated DIO.
Signal
Type and
Signal Name Direction
ACH<0..3>+
ACH<0..3>–
DAC0OUT
DAC1OUT
Applies to range ≤
±
1
10 V, impedance refers to ACH<0..3>–.
±
2
Applies to range > 10 V, impedance refers to ACH<0..3>–.
© National Instruments Corporation
Reference
DGND
DGND
DGND
DGND
Table 4-3. Analog I/O Signal Summary for the NI 6115
Impedance
Input/
Output
AI 1 MΩ in
parallel with
1
100 pF
or 10 kΩ in
parallel with
2
40 pF
AI 10 nF to
ACH<0..3>
GND
50 Ω
AO
50 Ω
AO
Direction
Input PFI8/Counter 0 Source—As an input, this is a PFI. As
Output an output, this is the GPCTR0_SOURCE signal. This
signal reflects the actual source connected to the
general-purpose counter 0.
Input PFI9/Counter 0 Gate—As an input, this is a PFI. As an
Output output, this is the GPCTR0_GATE signal. This signal
reflects the actual gate signal connected to the
general-purpose counter 0.
1
Output Counter 0 Output—This output is from the
general-purpose counter 0 output.
Output Frequency Output—This output is from the frequency
generator output.
Protection
(Volts) Source
On/Off (mA at V)
42 V —
42 V —
Short-circuit 5 at 10
to ground
Short-circuit 5 at 10
to ground
4-5
Chapter 4 Connecting Signals
Description
Rise
Sink Time
(mA at V) (ns)
— — ±300 pA
— — ±300 pA
5 at –10 —
5 at –10 —
NI 6115/6120 User Manual
Bias
—
—