National Instruments DAQ PCI-4451, User Manual

Page: 38 / 122

Chapter 4 Signal Connections
PCI-4451/4452/4453/4454 User Manual 4-4 www.ni.com
Table 4-2. Analog I/O Signal Summary for the PCI-4451/4452
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 1 M
Ω
in parallel
with
50 pF to
AIGND
±42.4 V/±42.4 V
†
— — — ±100 pA
−
ACH<0..3> AI 1 M
Ω
in parallel
with
50 pF to
AIGND
±42.4 V/±42.4 V
†
— — — ±100 pA
AIGND AI — — — — — —
+DAC0OUT AO 22
Ω
to
−
DAC0OUT,
4.55 k
Ω
to
AOGND
Short-circuit to
−
DAC0OUT,
ground
16.7 mA at
10 V — — —
−
DAC0OUT AO 22
Ω
to
+DAC0OUT,
4.55 k
Ω
to
AOGND
Short-circuit to
+DAC0OUT,
ground 16.7 mA at
10 V — — —
+DAC1OUT AO 22
Ω
to
−
DAC1OUT,
4.55 k
Ω
to
AOGND
Short-circuit to
−
DAC1OUT,
ground
16.7 mA at
10 V — — —
−
DAC1OUT AO 22
Ω
to
+DAC1OUT,
4.55 k
Ω
to
AOGND
Short-circuit to
+DAC1OUT,
ground 16.7 mA at
10 V — — —
AOGND AO — — — — — —
DGND DIO — — — — — —
+5 V DO 0.7
Ω
Short-circuit to
ground 1 A — — —
AI = Analog Input AO = Analog Output DIO = Digital Input/Output DO = Digital Output
†
±400 V/±400 V guaranteed by design, but not tested or certified to operate beyond ±42.4 V