Emerson Fisher FIELDVUE DVC6000, Инструкция по эксплуатации

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DVC6000 Digital Valve Controllers
September 2013 2-30
DIGITAL VALVE
CONTROLLER
4-20 mA
VALVE
Tx Tx
I/O I/O
HART
FILTER
NON-HART BASED
DCS
A6188-1/IL
Figure 2-24. HART Filter Application
Wiring Practices
Control System Requirements
There are several parameters that should be checked
to ensure the control system is compatible with the
DVC6000 digital valve controller.
HART Filter
Depending on the control system you are using, a
HART filter may be needed to allow HART
communication. The HART filter is a passive device
that is inserted in field wiring from the HART loop. The
filter is normally installed near the field wiring terminals
of the control system I/O (see figure 2-24). Its purpose
is to effectively isolate the control system output from
modulated HART communication signals and raise the
impedance of the control system to allow HART
communication. For more information on the
description and use of the HART filter, refer to the
separate HART filter instruction manual.
Contact your Emerson Process Management sales
office if assistance is needed to determine if your
system requires a filter.
Note
A HART filter is typically NOT required
for any of the Emerson Process
Management control systems,
including PROVOX
t
, RS3
t
, and
DeltaV
t
systems.
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