Emerson FB3000 - Analog Output Mode (HART Communications Disabled)

FB3000 RTU Instruction Manual
D301851X012
November 2023
I/O Configuration and Wiring 65
3.2.4 Analog Output Mode (HART Communications Disabled)
If you have an unused HART channel, you can use it as a 4-20mA current sinking analog
output.
In FBxConnect, you must Disable the 250 Ohm Termination Resistor and set the HART
Comm Mode to Disabled.
Figure 3-15 shows two examples for wiring a HART channel as a 4-20mA analog output. In
the figure, an externally powered current loop receiver connects to Channel 1 and a
24VDC loop supply-powered current loop receiver connects to Channel 4.
Figure 3-15. Connecting 4mA to 20mA Analog Outputs to 3HRT04 Channel (No HART
communications)
1
4-20mA Analog Signal Loop
2
Transducer
3
Driver
4
Power Supply
5
Actuator
6
3HRT04 Module internal ground connections (for information only; not visible to
user)
7
External Power Source