Emerson Rosemount 3814 Maintenance And Troubleshooting Manual page 66

Meter maintenance
January 2023
3.5.3 Replace Backplane, I.S. Barrier or Power Supply
board
The following sections detail removal of the Backplane board, the I.S. Barrier
Board and the Power Supply Board.
Backplane replacement
Procedure
1. If replacing the Backplane board, remove power to the meter.
2. Refer to
3. Disconnect the Transmitter Electronics Enclosure security seals, loosen the
4. Remove the CPU Module and the Optional I/O Module (if installed). See
5. Use a Phillips head screw driver and remove the four Backplane board
6. Pull the Backplane board out of the enclosure. This disconnects the I.S.
66
Figure 3-5 for the tools required to complete this procedure.
end cap security latches (3mm Allen wrench required) and remove both end
caps (see Figure 3-22).
Figure 3-21 for board locations and associated terminal blocks.
screws and captive star washers from the enclosure standoffs.
Barrier Board. Lay the Backplane board down with the Acquisition Cable still
attached (the Power Supply board may remain attached to the Backplane
when you remove it from the enclosure).
Maintenance and Troubleshooting Manual
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