Emerson Rosemount 3410 Series Maintenance And Troubleshooting Manual page 79

Maintenance and Troubleshooting Manual
00809-0600-3104
3. Use a 1/4 inch standard flat head screw driver and remove the Fuse Holder cap (see
4. Insert the replacement fuse (Littlefuse #218002.HXP) into the Fuse Holder.
5. Install the fuse cap into the holder and push until it is flush with the holder.
6. Turn the fuse cap clockwise 1/8 turn using a 1/4 inch standard flat head screw
7. If replacing other electronics, continue with
3.8.3 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. Disconnect the Transmitter Electronics Enclosure security seals, loosen the end cap
3. Remove the CPU Module and the Optional I/O Module (if installed). See
4. Use a Phillips head screw driver and remove the four Backplane board screws and
5. Pull the Backplane board out of the enclosure. This disconnects the I.S. Barrier
Rosemount Gas Ultrasonic Flow Meters
Figure 3-23).
driver.
Supply board, and Acquisition Module replacement
and sealing the enclosure.
security latches (3mm Allen wrench required) and remove both end caps (see
Figure 3-25).
for board locations and associated terminal blocks.
captive star washers from the enclosure standoffs.
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).
Replace Backplane, I.S. Barrier or Power
before replacing the end caps
Meter repairs
April 2022
Figure 3-23
79