Instruction Manual
D103785X012
Maintenance and Troubleshooting
June 2017
71
Pneumatic Relay
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 6‐6. 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
S
m (20.7 lbf
S
in).
4. Using the Field Communicator, verify that the value for the parameter Relay matches the relay type installed.
5. After replacing the relay and verifying the relay type, calibrate travel or perform touch‐up calibration to maintain
accuracy specifications
Figure 6‐6. Pneumatic Relay Assembly
W8074
RELAY SEAL