National Instruments SCXI Series - Page 126

Chapter 4 Connecting and Using Accessories and Transducers
Getting Started with SCXI 4-30 www.ni.com
Figure 4-18 shows how to connect a DAC channel as a current output using
an external loop supply.
Figure 4-18. DAC Channel Connection as Current Output, External Loop Supply
SCXI-1124
0-20 mA
ISINK
+
GND
SCXI-1124
0-20 mA
OR
Load
Load
+
V
EXT
V
EXT
SCXI-1124
GND
ISINK
+
V
EXT
Load
V
CM
+
High
CMV
SCXI-1124
V
CM
+
High
CMV
Load
+
V
EXT
I
I
ISINK
GND
0-20 mA
0-20 mA
GND
ISINK
I
I
a. Floating Load and Floating Supply Connection
b. V
EXT
with High CMV
c. Load with High CMV
–
–
–
–
–
–