Replace Cpu Module Or Optional I/O Module (Future); Figure 3-33 Cpu Or Optional I/O Module (Future) Replacement - Emerson Daniel 3812 Maintenance And Troubleshooting Manual

Maintenance and Troubleshooting Manual
3-9000-767 Rev A
3.4.1

Replace CPU Module or Optional I/O Module (Future)

1.
2.
3.
4.

Figure 3-33 CPU or Optional I/O Module (Future) replacement

A.
B.
C.
D.
E.
F.
A. Terminal end of Transmitter Electronics Enclosure
B. CPU Module
C. Optional I/O Module (Future)
D. Power Supply board
E. Fuse
F. Internal chassis ground
5.
6.
7.
Replace CPU Module or Optional I/O Module (Future)
Remove power to the meter.
Refer to Figure 3-4 for the tools required to complete this procedure.
Disconnect security seals on the Transmitter Electronics Enclosure
loosen the end cap security latches using a 3 mm Allen wrench
remove both end caps from the Transmitter Electronics Enclosure.
If replacing the CPU Module (terminal end of the enclosure) or the Optional I/O Module
(Future), use a 3mm flat blade screw driver and disconnect the CPU Module terminal
blocks (or the Optional I/O Module (Future) terminal blocks).
Grasp the module you want to replace and pull it out of the enclosure.
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.
Replace the terminal blocks for the CPU Module and/or the Optional I/O Module and
tighten the flat head screws with a 3mm flat blade screw driver.
Section 3: Meter maintenance
June 2011
(see Figure 3-6),
(see Figure 3-7) and
65