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installing and removing
5.1 Safety notices for installation
Connecting media modules and SFP transceivers
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.
NOTICE
Failure of the data traffic due to contamination of optical plug-in connections
Optical sockets and plugs are sensitive to contamination of the end face. Contamination can
lead to the failure of the optical transmission network.
Close unused optical sockets and plugs as well as pluggable transceivers and slots with the
supplied protective caps.
Remove the protective caps only immediately before you use the plug-in connection.
NOTICE
Use only approved SFPs
If you use components not approved by Siemens AG, in particular SFPs, Siemens cannot accept
any responsibility for the correct functioning of the "Ethernet switch system" according to the
specification.
Moreover, if components are used that have not been Siemens approved, Siemens cannot
vouch for their compatibility or for risk-free use of these components.
20
CAUTION
MM900 media modules for SCALANCE XR-500M
Compact Operating Instructions, 04/2022, A5E03275846-05
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