Table of Contents
Advertisement
Chapter 4
Signal Connections
Signal Name
PFI4/GPCTR1_GATE
GPCTR1_OUT
PFI5/UPDATE*
PFI6/WFTRIG
PFI7/STARTSCAN
PFI8/GPCTR0_SOURCE
PFI9/GPCTR0_GATE
GPCTR0_OUT
FREQ_OUT
AI = Analog Input
AO = Analog Output
Note: The tolerance on the 50 kΩ pullup and pulldown resistors is very large. Actual value can range between 17 kΩ and
100 kΩ.
Analog Input Signal Overview
Types of Signal Sources
6023E/6024E/6025E User Manual
Table 4-3. I/O Signal Summary (Continued)
Signal
Impedance
Type and
Input/
Direction
Output
DIO
—
DO
—
DIO
—
DIO
—
DIO
—
DIO
—
DIO
—
DO
—
DO
—
DIO = Digital Input/Output
DO = Digital Output
The analog input signals for these devices are ACH<0..15>, ASENSE, and
AIGND. Connection of these analog input signals to your device depends
on the type of input signal source and the configuration of the analog input
channels you are using. This section provides an overview of the different
types of signal sources and analog input configuration modes. More
specific signal connection information is provided in the
Signal Connections
When configuring the input channels and making signal connections,
you must first determine whether the signal sources are floating or
ground-referenced.
Protection
(Volts)
Source
On/Off
(mA at V)
V cc +0.5
3.5 at (V cc -0.4)
—
3.5 at (V cc -0.4)
V cc +0.5
3.5 at (V cc -0.4)
V cc +0.5
3.5 at (V cc -0.4)
V cc +0.5
3.5 at (V cc -0.4)
V cc +0.5
3.5 at (V cc -0.4)
V cc +0.5
3.5 at (V cc -0.4)
—
3.5 at (V cc -0.4)
—
3.5 at (V cc -0.4)
pu = pullup
section.
4-8
Sink
Rise
(mA
Time
at V)
(ns)
Bias
5 at 0.4
1.5
50 kΩ pu
5 at 0.4
1.5
50 kΩ pu
5 at 0.4
1.5
50 kΩ pu
5 at 0.4
1.5
50 kΩ pu
5 at 0.4
1.5
50 kΩ pu
5 at 0.4
1.5
50 kΩ pu
5 at 0.4
1.5
50 kΩ pu
5 at 0.4
1.5
50 kΩ pu
5 at 0.4
1.5
50 kΩ pu
Analog Input
ni.com
Advertisement
Table of Contents
