Classification of dynamic passbox

Is dynamic passbox always considered as Grade A or it depends on the Grade of the cleanroom in which it is installed.

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Dynamic passbox communicates to different rooms, usually those rooms have different classification and, in order to increase security, we prefer to classify each passbox with the class of the cleanest room of the two the passbox connects

Greet, Tania

If pass box installed between b and d grade then pass box should meet b grade classification.

yes,should meet b grade classification.