Emerson FIELDVUE DVC6200f, Instruction Manual

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DVC6200f Digital Valve Controller
November 2010 12
LINEAR, M8
ROTARY NAMUR, M6
SLOTS FOR
MOUNTING BOLTS
HOUSING FOR
LINEAR AND ROTARY ACTUATORS
HOUSING FOR
FISHER GX ACTUATORS
HOLE FOR
MOUNTING BOLT
W9704
W9703
INTEGRAL OUTPUT
PRESSURE PORT
Figure 2-1. Housing Configurations
Mounting the DVC6200f
The DVC6200f housing is available in two different
configurations, depending on the actuator mounting
method. Figure 2-1 shows the available configurations.
The feedback system for the DVC6200f digital valve
controller utilizes a magnetic assembly for
linkage-less, non-contacting position measurement. In
order to prevent inadvertent stem movement while the
instrument is in operation, magnetic tools (such as a
magnetic-tipped screwdriver) should not be used.
CAUTION
The magnet assembly material has
been specifically chosen to provide a
long-term stable magnetic field.
However, as with any magnet, care
must be taken when handling the
magnet assembly. Another high
powered magnet placed in close
proximity (less than 25 mm) can cause
permanent damage. Potential sources
of damaging equipment include, but
are not limited to: transformers, DC
motors, stacking magnet assemblies.
Note
As a general rule, do not use less than
60% of the magnet assembly travel
range for full travel measurement.
Performance will decrease as the
assembly is increasingly subranged.
The linear magnet assemblies have a
valid travel range indicated by arrows
molded into the piece. This means that
the hall sensor (on the back of the
DVC6200f housing) has to remain
within this range throughout the entire
valve travel. See figure 2-3. The linear
magnet assemblies are symmetrical.
Either end may be up.
Note
Mounting the instrument vertically,
with the vent at the bottom of the
assembly, or horizontally, with the
vent pointing down, is recommended
to allow drainage of moisture that may
be introduced via the instrument air
supply.
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