Multiple-Module Multiplexed Scanning; Figure 3-9. Single-Module Multiplexed Scanning (Indirect); Figure 3-10. Multiple-Module Multiplexed Scanning - National Instruments SCXI-1121 User Manual
Four-channel isolated universal transducer module for signal conditioning
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Also See for SCXI-1121:
- User manual (146 pages) ,
- Calibration procedure (21 pages) ,
- Getting started (158 pages)
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SCANCON X
SLOT 0
SCANCON B
SCANCON A
SLOT 0
SCXI Module
© National Instruments Corporation
SCXI-1000 or SCXI-1001 Chassis
TRIG0
Other
SCXI-1121
Module
SLOT X
Analog Bus 0
Figure 3-9. Single-Module Multiplexed Scanning (Indirect)
Multiple-Module Multiplexed Scanning
In this mode, all the modules tie into Analog Bus 0, and SCANCON
enables the output of their amplifiers. The module that is directly cabled to
the data acquisition board sends SCANCLK onto TRIG0 for the other
modules and Slot 0, as illustrated in Figure 3-10. The scan list in Slot 0 is
programmed with the sequence of modules and the number of samples per
entry.
SCXI-1000 or SCXI-1001 Chassis
SCANCON X
TRIG0
SCXI Module
SLOT B
SLOT A
Figure 3-10. Multiple-Module Multiplexed Scanning
Cable
Assembly
SCANCLK
MCH0
SCANCLK
MCH0
SCXI Module
SLOT X
Analog Bus 0
3-19
Chapter 3
Theory of Operation
Data Acquisition Board
Timing Output
Analog Input
Data Acquisition Board
Cable Assembly
SCXI-1121 User Manual
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