Emerson Rosemount 3410 Series Maintenance And Troubleshooting Manual page 74

Meter repairs
December 2023
13. Adjust the security wire, removing all slack and thread into the lead seal.
14. Cut wire ends to remove excess wire.
15. Apply power to the meter.
This completes the IS barrier board replacement procedure.
Postrequisites
If you encounter problems with this procedure, see Emerson.com/global.
Power supply board replacement
Procedure
1. If replacing the power supply board, remove power to the meter.
2. Disconnect the transmitter electronics enclosure security seals, loosen the endcap
3. Use a flathead screwdriver and remove the terminal blocks from the power supply
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• If you are not replacing other electronics, replace the endcaps and security
latches (3 mm Allen wrench required).
— If required, install the security seal wire into and through one of the two holes
in the endcap.
— Choose holes that minimize counterclockwise rotation of the endcap when
the security wire is taut (maximum wire diameter 0.078-in. [2.0 mm]).
Figure 3-27: Transmitter electronics enclosure security seals
A. Transmitter Electronics Enclosure endcap
B. Security wire seals
security latches with a 3 mm Allen wrench, and remove both endcaps (see
3-27).
board, the central processing unit (CPU) module, and the optional input/output (I/O)
module (if installed).
See Figure 3-22 for board locations and associated terminal blocks.
Maintenance and Troubleshooting manual
Emerson.com/Rosemount
00809-0200-3104
Figure