Emerson Fisher FIELDVUE DVC7K Series Quick Start Manual page 20

DVC7K Digital Valve Controllers
October 2023
Figure 21. Bottom View: Pneumatic Port, Alternative Output B
2. Connect the DVC7K pneumatic output to the actuator input using at least 10 mm (3/8­inch) diameter tubing.
D When using a single­acting direct digital valve controller (relay A or C) on a single­acting actuator, connect
OUTPUT A to the actuator pneumatic input.
D When using a single­acting reverse digital valve controller (relay B) on a single­acting actuator, connect OUTPUT
B to the actuator diaphragm casing.
D When using a double­acting digital valve controller (relay A) on a double­acting actuator, connect OUTPUT A and
OUTPUT B to the appropriate actuator pneumatic input. With no input current to the DVC7K, OUTPUT A is at
zero pressure and OUTPUT B is at full supply pressure when the relay is properly adjusted.
Note
To have the actuator stem extend from the cylinder with increasing input signal, connect OUTPUT A to the actuator cylinder
connection farthest from the actuator stem. Connect OUTPUT B to the cylinder connection closest to the actuator stem. To have
the actuator stem retract into the cylinder with increasing input signal, connect OUTPUT A to the actuator cylinder connection
closest to the actuator stem. Connect OUTPUT B to the cylinder connection farthest from the actuator stem.
Note
Solenoid valves placed between the output of a DVC7K digital valve controller and the input to an actuator require a minimum C
of 0.49. Greater restrictions can affect the response of the assembly.
20
ALTERNATIVE
OUTPUT B
Quick Start Guide
D104766X012
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