Chapter 3
Connecting the Signals
©
National Instruments Corporation
3-9
SCXI-1141/1142/1143 User Manual
Rear Signal Connection Descriptions
Pin
Signal Name
Description
3
OUTPUT
Output—this is the main module analog output. In
multiplexed mode, the outputs of all eight channels appear
here in sequence. Outputs from other modules can also
appear here through the analog bus. In parallel mode, this is
the output of channel 0.
5, 7, 9, 11,
13, 15, 17
AOUT<1..7>
Analog outputs—these pins are the outputs of channels 1
through 7, regardless of the scanning mode.
25
SERDATIN
Serial data in—this signal taps into the SCXIbus MOSI line
to send serial input data to a module or Slot 0.
27
DAQD*/A
Board data/address line—this signal taps into the SCXIbus
D*/A line to indicate to the module whether the incoming
serial stream is data or address information.
29
SLOT0SEL*
Slot 0 select—this signal taps into the SCXIbus INTR* line
to indicate whether the information on MOSI is being sent to
a module or Slot 0.
24, 33
DIGGND
Digital ground—these pins supply the reference for DAQ
digital signals and are tied to the module digital ground.
37
SERCLK
Serial clock—this signal taps into the SCXIbus SPICLK line
to clock the data on the MOSI and MISO lines.
43
RSVD
Reserved.
4
OUTPUT REF
Output reference—this pin connects to the module analog
ground unless an output from another module is selected
through the analog bus, in which case the pins connect to the
analog ground for the selected module.
6, 8, 10, 12,
14, 16, 18
AGND
Analog ground—these pins connect to the module analog
ground. They are used as the reference points for AOUT1
through AOUT7.
