5/12/2017
TECH-538/D.W.O. 23160
Page 16 of 189
Principles of Operation
The ICoT FF (5400 and 6400)
continuously controls the position of a valve based on the fieldbus input
signal. The ICoT senses the valve position via a non-contact magnetic sensor (or other optional sensor in
the TOG/POT versions) and controls the valve positioning through a pressure transducer.
The next picture shows a typical application drawing of an ICoT 5400/6400 positioner assembled on a
linear actuator and valve.
Figure 1-4 – ICoT Positioner connected to a pneumatic valve
The ICoT FF
is also a two wire,
polarity insensitive
instrument that receives both signal and power from
the bus. Current consumption of the ICoT FF is 12.5mA with an operating voltage of 9 – 32 Vdc.
See
Section 1.8 (Technical Specification
for more information about technical
specification.
The ICoT FF
allows
calibration
and access to on-line diagnostic information via FF compatible hand-held
terminal or through configuration software present in host configuration systems.
A set of hermetically sealed non-contact limit switches is an option that can be integrally supplied with
the ICoT FF
9
The limit switches are not connected to any internal logic of the ICoT so they cannot be accessed
through a DI function block or any other block.
