Siemens X-400 Fast Ethernet Media Module MM491-2 100Base-FX, Properties, Connector

Media Modules, Covers, Dummy Cover

4.1.1Fast Ethernet Media Module MM491-2 (100Base-FX)

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

Properties

The fast Ethernet media module provides two ports for connecting the multimode FOC. The signal is transmitted by LED with a wavelength of 1310 nm. The maxi- mum cable length is 3 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, a fixed transmission rate of 100 Mbps and full duplex mode is set. 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 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 4-2 Slots of the MM491-2 media module

Operating Instructions for SCALANCE X-400 Industrial Ethernet Switches	51
C79000-G8976-C186-03