Installation
5.3 Inserting media modules and SFP transceivers
SCALANCE X-300
120 Operating Instructions, 02/2012, A5E01113043-12
CAUTION
Remember the orientation of media modules.
On modular devices, there are always two module slots arranged opposite each other.
Remember the correct orientation when installing MM900 media modules.
Example:
• The first MM900 media module is installed in slot 3.
• The second MM900 media module installed in slot 4 must be turned through 180
degrees.
On modular devices for rack mounting, pairs of module slots are located one above the
other in which modules can be inserted in a specific order:
Example of a rack device:
• The first MM900 media module is installed in slot 1.
• The second MM900 media module installed in slot 7 must be turned through 180
degrees.
Other modules are then inserted in slots 2 and 8 or 3 and 9 etc.
The permitted operating temperature is decided by the fully equipped device (switch +
media module + SFP transceiver).
With modular devices, it is not only the switch that decides the permitted operating
temperature of the overall device but also the temperature ranges of the MM900 media
modules and the SFP transceivers. You will find details in the technical specifications of the
relevant components.
The following aspects can restrict the maximum permitted operating temperature:
• The orientation of the carrier device.
• The use of SFP transceivers.
• The use of transceivers of the types LH, LH+ or ELH.
Note
SFP transceivers with the SCALANCE XR324-4M EEC
In contrast to the information in the product documentation for the SCALANCE MM900,
MM992-2SFP media modules can be operated in the SCALANCE XR324-4M EEC at
ambient temperatures up to a maximum of 70 °C if the following requirements are met:
• MM992-2SFP media modules as of hardware product version 02 are suitable. The
hardware product version can be found on the device. You can also read out this
information with the WBM or the CLI.
• Only the following SFP transceivers may be used:
– SFP991-1
– SFP991-1LD
– SFP992-1
– SFP992-1LD
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