36
Replace CPU Module or optional I/O Module
Section 3: Meter maintenance
Reference, Installation and Operation Manual
December 2017
3-9000-764 Rev F
3.5.1
Replace CPU Module or optional I/O Module
1.
Remove power to the meter.
2.
for the tools required to complete this procedure.
3.
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.
4.
If replacing the CPU Module (terminal end of the enclosure) or the optional I/O Module,
use a 1/8 inch (3mm) flat blade screw driver and disconnect the CPU Module terminal
blocks (or the optional I/O Module terminal blocks).
Figure 3-22 CPU or I/O Module replacement
5.
Grasp the module you want to replace and pull it out of the enclosure.
6.
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.
7.
Replace the terminal blocks for the CPU Module and/or the Optional I/O Module and
tighten the flat head screws with a 1/8 inch (3mm) flat blade screw driver.
A. Terminal end of Transmitter Electronics Enclosure
B. CPU Module
A.
C.
B.
D.
C. Optional I/O Module
D. Power Supply board
F.
E. Fuse
E.
F. Internal chassis ground
