Fast Ethernet Media Module Mm491-2 (100Base-Fx) - Siemens SCALANCE X-400 Operating Instructions Manual

3.4.4.2

Fast Ethernet media module MM491-2 (100Base-FX)

Introduction
● SCALANCE X414-3E
The Fast Ethernet media module MM491-2 can be used optionally in slots 6 and 7 and
when using the media module extender EM496-4, it can also be used in slots 12 through
15. Mixed operation with the Fast Ethernet media modules MM491-2LD and
MM491-2LH+ is possible.
● SCALANCE X408-2
As an option, the Fast Ethernet media module MM491-2 can be used in slots 5 and 6 of
the basic device. Mixed operation with the Fast Ethernet media modules MM491-2LD and
MM491-2LH+ and the gigabit Ethernet media modules MM492-2LD, MM492-2LH,
MM492-2LH+ and MM492-2ELH is possible.
Note
The Fast Ethernet media module MM491-2 can only be used with the
SCALANCE X408-2 as of product version 04.
Properties
The Fast Ethernet media module provides two ports for connecting the multimode FOC. Both
ports of the module can be configured as ring ports. The signal is transmitted by LED with a
wavelength of 1310 nm. The maximum cable length is 3 km.
Connector
The connectors are 2x2 BFOC sockets.
SCALANCE X-400
Operating Instructions, 06/2015, C79000-G8976-C186-12
Description
3.4 Description of the product
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