DI-2008 Hardware Manual
Controls, Indicators, and Connections
22
4-20mA Current Loop Measurements
Use the following diagrams for 4-20mA current loop measurement connections.
Set the engineering units as desired and define upper/lower levels in W
IN
D
AQ
as 1V = 4mA for the low value and 5V
= 20mA for the high value. For example, when using W
IN
D
AQ
Acquisition software, in the EU Settings dialog box:
Enter the following values:
You can also associate these values to a physical measurement such as pressure, load, flow, torque, etc. Read the Help
files for more information regarding Engineering Units Settings.
Vol
t
EU
EU Tag
Upper Level
5
20
mA
Lower Level
1
4
Analog
Input
+15V
Supply
R250
4-20mA
Sensor
Analog
Input
Analog
Input
R250
4-20mA
Sensor
+15V
Supply
R250
4-20mA
Sensor
