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Chapter 4 Connecting Signals
NI 6115/6120 User Manual 4-6 ni.com
Table 4-4. Analog I/O Summary for the NI 6120
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..3>+ AI 100 GΩ
to GND
±42 V to
GND
— — — ±300 pA
ACH<0..3>– AI 100 GΩ
to GND
±42 V to
GND
— — — ±200 pA
Differential Pair
ACH<0..3>+ to
ACH<0..3>–
AI 1 MΩ 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
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 kΩ
pu
SCANCLK DO — — 3.5 at
(V
CC
–0.4)
5 at 0.4 1.5 50 kΩ
pu
EXTSTROBE* DO — — 3.5 at
(V
CC
–0.4)
5 at 0.4 1.5 50 kΩ
pu
PFI0/TRIG1 AI
DIO
10 kΩ ±35
V
CC
+0.5
3.5 at
(V
CC
–0.4)
5 at 0.4 1.5 9kΩ
pu and
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 kΩ
pu
PFI2/CONVERT* DIO — V
CC
+0.5 3.5 at
(V
CC
–0.4)
5 at 0.4 1.5 50 kΩ
pu