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Keys are used for coding of board-type plug-in units and prevent the use of assemblies in incorrect slots. The keys are inserted into the chambers of the keyable guide rails and the injector/extractor handles, types IV, IVs and VII
(4 positions are possible). This produces 64 keying combinations per guide rail.
When keying the top and bottom guide rail, 4096 potential combinations are possible.
Standards: IEEE 1101.10, IEC 60 297-5-104
Material: Plastic, PBTP, base material to UL 94-V0