Connector System M12/X-Coded According To Iec 61076-2-109 - Siemens SCALANCE X-300 Series Operating Instructions Manual

Appendix
A.2 Connector system M12/X-coded according to IEC 61076-2-109
Autonegotiation
Autonegotiation means the automatic detection of the functionality of the port at the opposite
end. Using autonegotiation, network components or end devices can detect the functionality
available at the port of a partner device allowing automatic configuration of different types of
device. With autonegotiation, two components connected to a link segment can exchange
parameters and set themselves to match the supported communication functionality.
Note
With devices that do not support autonegotiation, the IE Switch X-300 port must be set
manually to the speed and duplexity settings of the device (in other words, the identical setting).
Note
The IE Switch X-300 is a plug-and-play device that does not require settings to be made for
commissioning.
MDI /MDIX autocrossover function
The advantage of the MDI /MDIX autocrossover function is that straight-through cables can be
used throughout and crossover Ethernet cables are unnecessary. This prevents malfunctions
resulting from mismatching send and receive wires. This makes installation much easier for the
user.
The IE Switches X-300 all support the MDI / MDIX autocrossover function.
Note
Autocrossover works only in autonegotiation is enabled. If the setting is fixed, there is no
autocrossover (see Glossary).
Note
Please note that a direct connection between two ports on the IE Switch X-300 or an accidental
connection over several IE Switches X-300 can cause illegal formation of loops unless RSTP
or STP is activated. Such a loop can lead to network overload and network failures.
A.2

Connector system M12/X-coded according to IEC 61076-2-109

Description
M12 connectors with X coding are also suitable for transmission rates up to 10 Gbps (Cat6A)
because the shields of the wire pairs can be led into the connectors. A further advantage is the
availability of connectors with degree of protection IP67 with which the equipped devices are
also suitable for adverse environmental conditions (dust, dampness). Due to the locking
technology standardized for the M12 connectors a high resistance to vibration is achieved.
Numerous SCALANCE devices therefore provide connection options for X coded M12
connectors.
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Operating Instructions, 11/2019, A5E01113043-24
SCALANCE X-300