Emerson Fisher FIELDVUE DVC6000f, Instruction Manual

Page: 46 / 384

DVC6000f Digital Valve Controllers
December 2009 2-22
correctly installed. Failure to do so
could result in personal injury or
property damage from fire or explosion,
and area re-classification.
WARNING
Personal injury or property damage
can occur from cover failure due to
overpressure. Ensure that the
housing vent opening is open and
free of debris to prevent pressure
buildup under the cover.
The relay output constantly bleeds supply medium into
the area under the cover. The vent opening at the
back of the housing should be left open to prevent
pressure buildup under the cover. If a remote vent is
required, the vent line must be as short as possible
with a minimum number of bends and elbows.
To connect a remote vent to DVC6010f and
DVC6030f digital valve controllers—remove the
plastic vent (key 52, figures 8-2 and 8-4). The vent
connection is 3/8 NPT internal. Typically, 12.7 mm
(0.5 inch) tubing is used to provide a remote vent.
To connect a remote vent to a DVC6020f digital
valve controller—replace the standard mounting
bracket (key 74, figure 8-3) with the vent-away bracket
(key 74). Install a pipe plug in the vent-away mounting
bracket (key 74). Mount the digital valve controller on
the actuator as described in the Installation section of
this manual. The vent connection is 3/8 NPT internal.
Typically, 12.7 mm (0.5 inch) tubing is used to provide
a remote vent.
Use 10 mm (0.275 inch) outside diameter tubing to
connect the 1/4 NPT digital valve controller output
connection to the pneumatic actuator input connection.
If a volume tank is used to attenuate flow instabilities,
the volume needs to be at least 1.64 liters (100 cubic
inch) but not greater than 4.1 liters (250 cubic inch).
To tune the digital valve controller for an assembly
equipped with a volume tank, select a tuning set for an
actuator with roughly the same volume. Do not use
tuning set B when a volume tank is present.
Alternatively, flow fluctuations may be attenuated by
placing a 0.9 mm (0.035 inch) fixed restriction between
the regulator and the output. A list of fixed restriction
orifice specifications is presented in table 2-2.
Table 2-2. Fixed Orifice Restrictions
Manufacturer Part Number Material Description
Fisher 1D4835X0012 316 SST
No. 74 drilled orifice bleed
adapter with 1/4 NPT
connections. Enlarge
orifice using No. 65 drill
and cross out the “74”
stamp.
O’Keefe
Controls Co.
G-35-SS 303 SST
0.035 inch orifice bleed
with 1/4 NPT connections
Electrical Connections
The following describes how to make fieldbus
connections to the digital valve controller. For
information on making other connections, such as
connecting a personal computer with ValveLink
software or connecting a simulate jumper, see the
Installation section.
WARNING
Refer to the Installation WARNING at
the beginning of this section.
WARNING
To avoid personal injury resulting
from electrical shock, do not exceed
the maximum input voltage specified
in table 1-1 of this instruction manual,
or on the product nameplate. If the
input voltage specified differs, do not
exceed the lowest specified maximum
input voltage.
WARNING
Personal injury or property damage
caused by fire or explosion may occur
if this connection is attempted in a
potentially explosive atmosphere or in
an area that has been classified as
hazardous. Confirm that area
classification and atmosphere
conditions permit the safe removal of
the terminal box cover before
proceeding
Fieldbus Connections
The digital valve controller is normally powered over
the bus from a fieldbus 9 to 32 volt power supply and
2