6GK5491 Page 1 ⍾ SIEMENS ⍾ Last modified Jun 7, 2026

The SIEMENS PROFINET/Industrial Ethernet 6GK5491 catalog offers media modules for the SCALANCE X-400 system, providing 2x 100 Mbit/s connectivity via multimode or singlemode fiber optic cables. These modules are hot swappable and feature an inscription field.

6GK5491 / PROFINET/Industrial Ethernet ⍾ Page 1

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6GK5491-2AB00-8AA2

********** spare part ********* SCALANCE X-400 accessories, media module MM491-2, 2x 100 Mbit/s multimode BFOC, hot swappable, labeling field.
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6GK5491-2AC00-8AA2

SCALANCE X-400 ACCESORIES, MEDIA MODULE MM491-2LD, 2 X 100MBIT/S SINGLE MODE BFOC, HOT SWAPABLE, INSCRIPTION FIELD
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6GK5491-2AE00-8AA2

SCALANCE X-400 ACCESSORIES MEDIA MODULE MM491-2LH+, ACCESSORIES, 2 X 100MBIT/S SINGLEMODE SC, HOT SWAPABLE INSCRIPTION FIELD