Emerson FB3000 Panduan Instalasi - Halaman 9

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Figure 3

shows how to wire a HART channel for devices which do not use loop power but get power

from an external power supply.

Figure 3. HART Wiring – External Power Supply

HART Device

External 24V Power Supply

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 4

shows two examples for wiring a HART channel as a 4-20mA analog input. In the figure, an

externally powered current loop transmitter connects to Channel 1 and a loop powerd current loop

transmitter connects to Channel 4.

FB3000 RTU HART

I/O Module Field Installation Guide

D301918X012

June 2021