Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 89
Chapter 2 Installation Instructions
Figure 47 - Three-wire Analog Input
This field loop connection method is used for four-wire analog field devices.
Fit a suitably rated fuse, “F3” in each circuit to help protect the field wiring,
terminal block and 4mA -20mA current generator.
Figure 48 - Four-wire Analog Input
Field Wiring of Analog Input Termination Assemblies
The termination assembly routes each analog input through a circuit similar to
that shown in Figure 49
. The input channel is protected with a 50 mA fuse.
Shield
Required
Terminal
Blocks
OV
Termination
Assembly
+24V DC
4…20 mA
3-Wire Analog Input
50 mA
120 Ω
Shield
Required
Terminal
Blocks
OV
Termination
Assembly
-V
+V
4…20 mA
4-Wire Analog Input
50 mA
120 Ω
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