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The 11000 Series has a protruding narrow horn where | The 11000 Series has a protruding narrow horn where | ||
the 7000 Series plug-ins have a wider horn at the top of the connector | the 7000 Series plug-ins have a wider horn at the top of the connector | ||
with electrical | with four holes for extra electrical contacts (only known use is the [[7A21N|7A21N direct deflection plate access plug-in]]). | ||
==Electrical Similarity to 7000-Series Plug-in Interface== | ==Electrical Similarity to 7000-Series Plug-in Interface== |