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

Description
3.4 Description of the product
3.4.4.3

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

Introduction
● SCALANCE X414-3E
The Fast Ethernet media module MM491-2 LD can be used optionally in slots 6 and 7 of
the basic device 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
MM491-2 and MM491-2LH+ is possible.
● SCALANCE X408-2
As an option, the Fast Ethernet MM491-2 LD media module can be used in slots 5 and 6
of the basic device. Mixed operation with the Fast Ethernet media modules MM491-2 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 MM491-2LD 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 single mode FOC.
Both ports of the module can be configured as ring ports. The signals are transmitted with a
laser diode at a wavelength of 1310 nm. The maximum cable length is 26 km.
Connector
The connectors are 2x2 BFOC sockets.
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Operating Instructions, 06/2015, C79000-G8976-C186-12
SCALANCE X-400