Emerson Fisher FIELDVUE DVC2000 Instruction Manual page 18

DVC2000 Digital Valve Controller
HOUSINGS FOR
LINEAR AND ROTARY ACTUATORS
CONNECTIONS AVAILABLE:
S M20 CONDUIT AND G1/4 PNEUMATIC
S 1/2 NPT CONDUIT AND 1/4 NPT PNEUMATIC
2
W9015
The DVC2000 housing is available in four different
configurations, depending on the actuator mounting
method and threaded connection style. Figure 2-1
shows the available configurations.
The feedback system for the DVC2000 digital valve
controller utilizes a magnetic field for true 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 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: transformers,
DC motors, stacking magnet arrays,
magnetic tipped screwdrivers.
2-4
ROTARY NAMUR, M6
LINEAR, M8
Figure 2-1. FIELDVUE DVC2000 Housing Variations
HOUSINGS FOR
FISHER GX ACTUATORS
CONNECTIONS AVAILABLE:
S M20 CONDUIT AND G1/4 PNEUMATIC
S 1/2 NPT CONDUIT AND 1/4 NPT PNEUMATIC
W9591
Note
As a general rule, do not use less than
50% of the magnet array for full travel
measurement. Performance will
decrease gradually as the array is
increasingly subranged.
The linear magnet arrays have a valid
travel range indicated by arrows
molded into the piece. This means that
the hall sensor (on the back of the
DVC2000 housing) has to remain
within this range throughout the entire
valve travel. See figure 2-2.
The linear magnet arrays are
symmetrical. Either end may be up.
There are a variety of mounting brackets and kits that
are used to mount the DVC2000 to different actuators.
However, despite subtle differences in fasteners,
brackets, and connecting linkages, the procedures for
mounting can be categorized as follows:
D Air-to-open sliding-stem (linear) actuators.
D Air-to-close sliding-stem (linear) actuators.
D Air-to-open GX actuator.
D Air-to-close GX actuator.
CAPTIVE MOUNTING BOLTS, M8
July 2009