National Instruments NI 6120 用户手册
Chapter 4
Connecting Signals
4-6
ni.com
Table 4-4. Analog I/O Summary for the NI 6120
Signal Name
Signal
Type and
Direction
Direction
Impedance
Input/
Output
Protection
(Volts)
On/Off
Source
(mA at V)
Sink
(mA at V)
Rise
Time
(ns)
Bias
ACH<0..3>+
AI
100 G
Ω
to GND
±42 V to
GND
—
—
—
±300 pA
ACH<0..3>–
AI
100 G
Ω
to GND
±42 V to
GND
—
—
—
±200 pA
Differential Pair
ACH<0..3>+ to
ACH<0..3>–
ACH<0..3>+ to
ACH<0..3>–
AI
1 M
Ω in parallel
with 100 pF
1
or
10k in parallel
with 40 pF
2
—
—
—
—
±300 pA
DAC0OUT
AO
50
Ω
Short-circuit
to ground
5 at 10
5 at –10
—
—
DAC1OUT
AO
50
Ω
Short-circuit
to ground
5 at 10
5 at –10
—
—
1
Applies to range
≤
±
10 V, impedance refers to ACH<0..3>–.
2
Applies to range >
±
10 V, impedance refers to ACH<0..3>–.
Table 4-5. Digital I/O Signal Summary
Signal Name
Signal
Type and
Direction
Direction
Impedance
Input/
Output
Protection
(Volts)
On/Off
Source
(mA at V)
Sink
(mA at V)
Rise
Time
(ns)
Bias
VCC
DO
0.1
Ω
Short-circuit
to ground
1 A
—
—
—
DIO<0..7>
DIO
—
V
CC
+0.5
13 at
(V
CC
–0.4)
24 at 0.4
1.1
50 k
Ω
pu
SCANCLK
DO
—
—
3.5 at
(V
CC
–0.4)
5 at 0.4
1.5
50 k
Ω
pu
EXTSTROBE*
DO
—
—
3.5 at
(V
CC
–0.4)
5 at 0.4
1.5
50 k
Ω
pu
PFI0/TRIG1
AI
DIO
10 k
Ω
±35
V
CC
+0.5
3.5 at
(V
CC
–0.4)
5 at 0.4
1.5
9 k
Ω
pu and
10 k
10 k
Ω
pd
PFI1/TRIG2
DIO
—
V
CC
+0.5
3.5 at
(V
CC
–0.4)
5 at 0.4
1.5
50 k
Ω
pu
PFI2/CONVERT*
DIO
—
V
CC
+0.5
3.5 at
(V
CC
–0.4)
5 at 0.4
1.5
50 k
Ω
pu