Autonegotiation
Autonegotiation means the automatic detection/negotiation of the transmission rate and the
operating mode of ports at the opposite end. This makes it possible to configure different devices
automatically.
Two components connected to a link segment can exchange information about the transfer and
can adapt their settings to each other. The mode with the highest possible speed is set.
Note
• If a port operating in the "Auto negotiation" mode is connected to a partner port that is not
operating in the"Auto negotiation" mode, the partner port setting must be fixed.
• Devices not supporting "Auto negotiation" must be set permanently to 100 Mbps or 10 Mbps
half duplex.
4.2.2
Optical
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. Take the following precautions to avoid
functional impairments:
• Clean the end face of field-assembled connectors carefully before connecting. No residues
of processing may remain on the connector.
• Only remove the dust caps of optical transceivers and pre-configured cables shortly before
connecting the cables.
• Close unused optical sockets and plugs as well as pluggable transceivers and slots with the
supplied protective caps.
LC connector technology
The attachment to Industrial Ethernet uses LC connector
technology (Lucent Connector).
Pluggable transceiver slot/
plugged in transceiver
Connecting up
4.2 Industrial Ethernet
SCALANCE XR-100WG
34
Operating Instructions, 09/2020, C79000-G8976-C455-04
