Media Modules, Covers, Dummy Cover

4.1.2Fast Ethernet Media Module MM491-2LD (100Base-FX)

The fast Ethernet media module MM491-2LD 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 module MM491 is possible.

Properties

The fast Ethernet media module provides two ports for connecting the single mode FOC. The signal is transmitted by laser diode with a wavelength of 1310 nm. The maximum cable length is 26 km.

Connector

The connectors are 2x2 BFOC sockets.

LED Display of the Fast Ethernet Media Module

The LED displays of the module are the same as the LEDs of the basic device. With optical transmission, only a fixed transmission rate and full duplex mode are possible. The display in display modes B and C is analogous.

In display mode A, the current connection status is displayed.

In display mode B, the fixed transmission rate is displayed.

In display mode C, the full duplex mode is always displayed.

In display mode D, you can see whether or not the port is monitored.

F

IN1/IN5

RM

P1

P1

P1

L1

IN2/IN6

STBY

P2

P2

P2

L2

IN3/IN7

DM1

 

 

 

 

IN4/IN8

DM2

 

 

 

P1 P1 P2 P2 P3 P3 P4 P4

P1

P2

P3

P4

2

3

4

5

6

7

8

9

10

11

Figure 4-3 Slots of the MM491-2LD media module

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Operating Instructions for SCALANCE X-400 Industrial Ethernet Switches

C79000-G8976-C186-03

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Image 52
Siemens X-400 technical specifications Fast Ethernet Media Module MM491-2LD 100Base-FX, Slots of the MM491-2LD media module