Instruction Manual

Maintenance and Troubleshooting
September 2013
7-7
Figure 7-4. DIP Switch Location
BACK OF PWB ASSEMBLY
SUB-MODULE
DIP SWITCH
UP
DOWN
TRAVEL SENSOR
CONNECTOR
TERMINAL BOX
CONNECTOR
Table 7-2. DIP Switch Configuration
(1)
Operational Mode Switch Position
Multi-drop Loop
UP
Point-to-Point Loop
DOWN
1. Refer to figure 7-4 for switch location.
Note
For the digital valve controller to
operate with a 4-20 mA control signal,
the DIP switch must be in the
point-to-point loop position, as shown
in table 7-2.
For the digital valve controller to
operate with a 24 VDC voltage control
signal, the DIP switch must be in the
multi-drop loop position, as shown in
table 7-2.
6. Reassemble the module base to the housing by
performing the Replacing the Module Base procedure.
7. Setup and calibrate the digital valve controller.
Figure 7-5. Pneumatic Relay Assembly
W8074
RELAY SEAL
Pneumatic Relay
Refer to figures 8-1 through 8-4 for key number
locations. The pneumatic relay (key 24) is located on
the front of the module base.
Note
After relay submodule replacement,
calibrate the digital valve controller to
maintain accuracy specifications.
Removing the Pneumatic Relay
1. Loosen the four screws that attach the relay
(key 24) to the module base. These screws are
captive in the relay.
2. Remove the relay.
Replacing the Pneumatic Relay
1. Visually inspect the holes in the module base to
ensure they are clean and free of obstructions. If
cleaning is necessary, do not enlarge the holes.
2. Apply silicone lubricant to the relay seal and
position it in the grooves on the bottom of the relay as
shown in figure 7-5. Press small seal retaining tabs
into retaining slots to hold relay seal in place.
3. Position the relay (with shroud) on the module
base. Tighten the four screws, in a crisscross pattern,
to a final torque of 2 Nm (20.7 lbfin).
4. Using the Field Communicator, verify that the value
for Relay Type parameter matches the relay type
installed.
5. After replacing the relay and verifying the relay
type, calibrate travel to maintain accuracy
specifications.
7