National Instruments SCXI-1120 Chapter 3 Theory of Operation

© National Instruments Corporation 3-1 SCXI-1120 User Manual
Chapter 3
Theory of Operation
This chapter contains a functional overview of the SCXI-1120 module and explains the operation
of each functional unit making up the SCXI-1120.
Functional Overview
The block diagram in Figure 3-1 illustrates the key functional components of the SCXI-1120.
SCXIbus
Digital
Interface
and
Control
Timing
and
Analog
Output
Stage
Rear Signal Connector
Isolated Section
Nonisolated
Section
Input Channel 0
Input Channel 1
Input Channel 6
Input Channel 7
Temperature Sensor
+
•
•
•
•
+
+
+
•
•
•
•
Front Connector
+
-
+
-
+
-
+
-
Figure 3-1. SCXI-1120 Block Diagram