Analog Input Mode (Hart Communication Disabled) - Emerson FB3000 Instruction Manual

Emerson FB3000 RTU Instruction Manual
D301851X012
October 2022
3.2.3

Analog Input Mode (HART Communication Disabled)

If you have an unused HART channel, you can use it as a 4-20mA analog input (AI current mode).
In FBxConnect, you must Enable the 250-Ohm Termination Resistor and set the HART Comm Mode
to Disabled.
Figure 3-14
an externally powered current loop transmitter connects to Channel 1 and a loop powered current
loop transmitter connects to Channel 4.
Figure 3-14. Connecting 4mA to 20mA Analog Inputs to 3HART04 Channel (No HART
Communications)
1
2
3
4
5
6
54
shows two examples for wiring a HART channel as a 4-20mA analog input. In the figure,
4-20mA Analog Signal Loop
Transducer
Power Supply
Sensor Input
External Power Source
3HRT04 Module internal ground connections (for information only; not visible to user)
I/O Configuration and Wiring