Emerson FB3000 설치 매뉴얼 - 페이지 8

{카테고리_이름} Emerson FB3000에 대한 설치 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Emerson FB3000 14 페이지. Remote terminal unit (rtu)
Emerson FB3000에 대해서도 마찬가지입니다: 현장 설치 매뉴얼 (12 페이지), 현장 설치 매뉴얼 (6 페이지), 현장 설치 매뉴얼 (18 페이지)

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Emerson FB3000 설치 매뉴얼
FB3000 RTU HART
®
I/O Module Field Installation Guide
D301918X012
June 2021
Multi-Drop Mode
In Multi-Drop Mode, only the HART digital signaling (FSK – Frequency Shift Keying) is present and
no 4-20mA analog current signal is permitted (no AO allowed). Each device can support a
maximum 4mA bias current. Because the maximum rated output (sink) current of any 3HRT04
Module channel is 20mA, and each device can draw 4mA, a HART channel in multidrop mode
supports a total of 5 HART devices. With each of the 5 HART devices permitted to draw 4mA, the
sum of the currents is 20mA – the maximum current.
Figure 2
inputs, you cannot have multi-drop outputs.
You can wire each channel the same way to allow for up to 20 HART devices (5 per channel).
Figure 2. HART Wiring – Multi-Drop Mode on Channel 1
HD
6
shows how to wire a HART channel for multi-drop mode. Multi-drop mode only supports
HART Device