ABB Advant Controller 450 - Submodule Carrier and Submodule; Carrier Module and Submodule Mechanism

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Submodule carriers are modules which fit the controller subrack only.
Carrier modules have no complete function. A carrier module has slots for specialized
submodules.
You can obtain the desired functionality by mounting submodules into the carrier module.
This is illustrated in Figure 1-55.
One submodule carrier usually houses two submodules.
In principle, the one submodule is independent of the other submodule. This means you can
insert, start, stop and remove the one submodule without affecting the other submodule.
The submodule carrier is a single point of failure. Damaging the carrier module may affect one
or both submodules. Replacing the carrier module, however, obviously affects both
submodules.
Mechanically, any submodule fits into any submodule position on Advant Controller 450.
The software does not, however, necessarily support all combinations.
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Submodule
Submodule
Submodule
Submodule Carrier
Insertion of submodules into
submodule carrier
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(Advant Controller 450
Controller subrack)
Inserted
submodules
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Submodule
Submodule
carrier