Emerson Rosemount 3410 Series, Maintenance And Troubleshooting Manual

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5. Insert the new CPU Module or I/O Module into the enclosure and firmly push until
the board is fully seated into the Backplane Board connectors and the lock is
engaged.
6. Replace the terminal blocks for the CPU Module and/or the Optional I/O Module
and tighten the flat head screws with a 3 mm flat blade screw driver.
7. If you are not replacing other electronics, replace the end caps and security latches
(requires a 3 mm Allen wrench). If required, install the security seal wire into and
through one of the two holes in the end cap.
a) Choose holes that minimize counterclockwise rotation of the end cap when
the security wire is taut (maximum wire diameter 0.078 inch; 2.0 mm).
Figure 3-25: Transmitter electronic enclosure security seals
A. Transmitter Electronics Enclosure end cap
B. Security wire seals
8. Adjust the security wire, removing all slack and thread into the lead seal.
9. Cut wire ends to remove excess wire.
10. If replacing other electronics or the fuse, continue with Replace the Fuse , Backplane
replacement , I.S. Barrier Board replacement or Power Supply Board replacement
and Acquisition Module replacement before replacing the end caps and sealing the
enclosure.
11. If you encounter problems replacing the electronics, see the Flow Lifecycle Services
contact information on the front cover of this manual.
This completes the CPU Module or I/O Module replacement procedure.
3.8.2 Replace the Fuse
Procedure
1. Remove power to the meter.
2. Disconnect the Transmitter Electronics Enclosure security seals (see
Figure 3-19 ),
loosen the end cap security latch (requires a 3 mm Allen wrench) on the terminal
end of the enclosure (see
Figure 3-22 ) and remove the end cap.
Meter repairs Maintenance and Troubleshooting Manual
April 2022 00809-0600-3104
78 Emerson.com/Rosemount