Honeywell ControlEdge 900 platform Hardware Planning And Installation Manual page 50

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replaced component through Control Builder. Wear an ESD
wrist strap and observe static precautions.
You will need a #2 Phillips screwdriver.
To replace an unsynchronized primary UOC-CPM:
It is recommended to first establish redundancy synchronization
n
between the redundant controllers (when possible) and follow the
procedure to replace a synchronized primary UOC-CPM below.
When primary CPM on-process replacement is either not required
n
or not possible due to inability to synchronize the redundant
controllers, follow the off-process procedures in Replacing a non-
redundant UOC-CPM section.
To replace a synchronized primary UOC-CPM:
1. [Optional] It is recommended to first transition the synchronized
primary CPM into the secondary role by issuing the redundancy
switchover command from Control Builder. This step {1}
transitions the synchronized secondary (redundant partner) CPM
into the primary role and {2} the CPM to be replaced restarts into
the secondary role.
2. Using an external (user-supplied) switch, disconnect the power
supply in the rack (associated with the CPM to be replaced) from
the source main power. If the optional switchover command was
not issued, this step {1} transitions the synchronized secondary
(redundant partner) CPM into the primary role and {2} the CPM to
be replaced restarts into the secondary role.
3. Observe where communications cables are plugged into the CPM
to be replaced, and if necessary, tag them to identify their
functions. Unplug all communications cables.
4. At the top and bottom of the module to be replaced, loosen the
captured screws that secure the module in the rack, and remove
the CPM from the rack. (Note that an up/down rocking motion
helps with removal of the module).
5. Configure the new CPM rotary device index switches to match the
old CPM rotary device index switches
6. Ensure that the new CPM is properly aligned with the slot guides,
insert the new CPM in the rack, and secure it in place with the
captured screws at top and bottom of the module.
7. Re-install communcation cables.
8. Using an external (user-supplied) switch, reconnect the power
supply in the rack (associated with the new CPM) to the source
main power.