中文版
Description
The Ovation HART Analog Output Module consists of an electronic module and a
personality mode. The Ovation HART Analog Output Module is designed to
interface with 8 HART compliant output devices utilizing a 4-20 mA control loop
signal. A HART compliant output device will exchange digital information with the
Ovation control system in addition to the standard 4-20 mA control loop signal. The
digital information is imposed on the 4-20 mA signal according to the guidelines of
the HART Protocol Specification. HART uses a low-level frequency – shift – keyed
sine-wave signal that is superimposed on the 4-20 mA signal. The average value of
the HART signal is zero. Therefore, the HART signal does not interfere with the 4-
20 mA control signal.
5X00121G01
Electronics Module
There is one Electronics module group for the HART Analog Output Module:
• 5X00121G01 contains 8 multiplexed, 4-20 mA output channels that interface
with 8 HART output devices.
Personality Module
There is one Personality Module group for the HART Analog Output Module:
• 5X00121G01 contains passive circuitry for each of the 8 channels. There is a
user serviceable fuse located on the personality module. This provides fusing
for the auxiliary power supply which powers the 8 output channels and field side
circuitry.
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