Emerson Fisher FIELDVUE DVC7K Series Quick Start Manual page 13

Quick Start Guide
D104766X012
2. Attach the digital valve controller to the actuator mounting pad.
Note
The plug (R1/8) from the back of the DVC7K housing must be installed for this application.
Use a 5 mm hex key to attach the digital valve controller to the GX actuator mounting pad.
Use a 13 mm socket or box end wrench to attach the digital valve controller to the 657 size 30i -70i actuator mounting pad.
3. Check for clearance between the magnet assembly and the DVC7K feedback slot.
4. Install tubing between the actuator casing and the appropriate DVC7K pneumatic output port.
5. If not already installed, install a vent in the port on the lower diaphragm casing or yoke.
6. Proceed to Step 2—Connect the Pneumatic Tubing on page 17.
Note
When field converting a GX actuator from air-to-close to air-to-open (or vice‐versa), you will need to change the plugs for the
pneumatic passages in the DVC7K housing.
D
To convert to air-to-open, remove the R1/8 pneumatic plug on the back of the DVC7K housing and install an O‐ring. Plug the
external pneumatic output with a pipe plug (1/4 NPT for imperial, R 1/4 for metric). Refer to figure 9.
D
To convert to air-to-close, remove the external pneumatic plug. Install an R1/8 plug on the back of the DVC7K housing. Install
tubing between the pneumatic output connection of the DVC7K to the pneumatic port on top of the actuator casing.
Note
Refer to the 657 Diaphragm Actuator Sizes 30/30i through 70/70i and 87 instruction manual (D100306X012) for 657 product
information.
Refer to the GX instruction manual (D103175X012) for GX product information.
DVC7K Digital Valve Controllers
October 2023
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