Replacing An Epm - Honeywell ControlEdge 900 platform Hardware Planning And Installation Manual

Replacing an EPM

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For AC: L1, L2 /N and Ground
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For DC: 24V DC +, 24V DC – and Ground
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7. Ensure power can be applied safely, and use the external (user-
supplied) switch to re-connect power to the power supply.
8. If the AC power supply is used, using a meter and the test points
on the face of the power supply, ensure that voltages (measured
on the backplane) are within specifications.
CAUTION: Explosion hazard. Removal and Insertion Under Power
is not supported in Division 2/ Zone 2.
You will need a #2 Phillips screwdriver.
To replace an EPM:
1. If a process is currently in operation, then do one of the following
two methods:
Ensure that removing the EPM will not have adverse
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consequences on any running process.
Bring the process to a safe and orderly shutdown.
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2. Observe where communications cables are plugged into the EPM
to be replaced, and if necessary, tag them to identify their
functions. Unplug the communication cable(s) from the Ethernet
port(s).
3. At the top and bottom of the EPM, loosen the captured screws
that secure the module in the rack, and remove the module from
the rack. (Note that an up/down rocking motion helps with
removal of the module.)
4. Configure the EPM address rotary switches on the replacement
module to match those of the removed module.
5. Ensure that the new EPM is properly aligned with the slot guides,
insert the new EPM in the rack, and secure it in place with the
captured screws at top and bottom of the module.
6. Re-install the communication cable(s).
7. Check status indicators at the EPM, CPM, and I/O modules.
8. Load firmware to the new EPM which is the same version as was
running in the removed module.