Pressure Sensor Board - Flowserve Logix 3400MD User Instructions

Figure 16: Main PCB Assembly

Pressure Sensor Board

13. Feed the two wires on the driver module back into the driver
module compartment so that they stick out the driver module
opening (see Figure 12). This will allow the driver module to thread
out without tangling or cutting the wires.
14. Grasp the base of the driver module and turn it counterclockwise to
remove. After it is threaded out, carefully retract the driver module
from the housing.
15. Remove the barbed fitting from the side of the new driver module
using the 1/4" nutdriver.
16. Verify that the O-ring is in place on the top of the new driver
module. Lay the wires back along the side of the driver module as
shown in Figure 12 and hold the wires in position by hand.
17. Gently insert the driver module into the driver module compart-
ment in the housing. Turn the driver module clockwise to thread
it into the housing. Continue rotating the driver module until it
bottoms out.
18. Once the driver module has bottomed out so that the threads are
fully engaged, rotate the driver module counter clockwise until the
Plastic Board Cover
Main PCB Retaining Screw
Regulator
Logix 3400MD Digital Positioner FCD LGENIM3404-00 – 9/09
Plastic Cover
Retaining Screws
Main PCB Assembly
Fieldbus PCB
flat on the driver module and the flat on the housing are aligned.
This will align the screw hole for the next step.
19. Verify that the nylon gasket is in the counter bore in the driver
module retaining screw hole as shown in Figure 14.
20. Insert a driver-to-housing screw into the driver housing through
the counterbored hole in positioner main housing. Tighten with a
Phillips screwdriver.
21. Reach through the main compartment into the driver module
compartment of the positioner and install the barbed fitting on the
side of the driver module using the 1/4" nutdriver.
NOTE: Do not mix the barbed fitting with those from older Logix
positioners. Older models contain orifices that will not work in the
Logix 3400MD model. Orifices are brass-colored, barbed fittings
are silver-colored.
22. Reconnect the flexible tube coming from the regulator to the barbed
fitting.
23. Feed the driver module wires into the main chamber of the housing,
and connect them to the main PCB Assembly.
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