Chapter 2
Using the SCXI-1126
2-8
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The digital I/O (DIO) and timing signals of the SCXI-1126 connect to the
DIO and timing lines of the E Series DAQ devices, as shown in Table 2-4.
For more information on these signals, consult the E Series DAQ device
user manual.
Table 2-3.
Rear Connector Signal Descriptions
Pin
Signal Name
Direction
Description
1–2
AOGND
Output
Analog Output Ground—These pins are software programmed to
connect to the analog reference when the SCXI-1126 is in RSE mode.
3–18
CH0± through
CH7±
Output
Analog Output Channels 0 through 7—These pins connect to the
E Series DAQ device DIFF analog input channels. In DIFF mode, CH0–
through CH7– are software programmed to connect to the analog
reference (power on and reset state).
19
OUTREF
Output
Output Reference—This pin is software programmed to connect to the
analog reference when the SCXI-1126 is in NRSE mode. Connect it to
the analog input sense pin of the E Series DAQ device in NRSE mode.
24, 33
DIG GND
—
Digital Ground—These pins supply the reference for E Series DAQ
device digital signals and connect to the SCXI-1126 digital ground.
25
SERDATIN
Input
Serial Data In—The E Series DAQ device uses this signal to program
modules in all slots.
26
SERDATOUT
Output
Serial Data Out—The cabled module uses this signal to return serial
output data from any module to the E Series DAQ device.
27
DAQD*/A
Input
E Series DAQ device Data/Address Line—The E Series DAQ device
uses this signal to indicate to the module whether the incoming serial
stream is data or address information.
29
SLOT0SEL*
Input
Slot 0 Select—The E Series DAQ device uses this signal to indicate
whether the information on SERDATIN is sent to a module or to the
Slot 0 controller.
36
SCANCLK
Input
Scan Clock—Indicates to the SCXI-1126 that the E Series DAQ device
took a sample and caused the SCXI-1126 to change channels.
37
SERCLK
Input
Serial Clock—The E Series DAQ device uses this signal to clock the
data on the SERDATIN and SERDATOUT lines.
43
RSVD
Input
Reserved.
Note
: All other pins are not connected.
