Weidmuller IE-MC-VL Series - Industrial Ethernet Media Converters - Manual (Page 12)

On FX port’s 100 Mbps is active
Blinking
Data is being transmitted at 100
Mbps 100M
(FX)
GREEN
Off 100BaseFX port is inactive
On
100BaseFX port is being
transmitted at full duplex
Blinking Collision occurs
FDX/
COL
GREEN
Off
100BaseFX port is being
transmitted at half duplex
Auto MDI/MDI-X Connection
The Auto MDI/MDI-X function allows users to connect the Media Converter’s
10/100BaseTX ports to any kind of Ethernet device, without paying attention
to the type of Ethernet cable being used for the connection. This means that
you can use either a straight-through cable or cross-over cable to connect the
Media Converter to Ethernet devices.
Dual Speed Functionality and
Switching
The Media Converter’s 10/100 Mbps RJ45 switched port auto negotiates with
the connected device for the fastest data transmission rate supported by both
devices. All models of Weidmüller Media Converter are plug-and-play devices,
so that software configuration is not required at installation, or during
maintenance. The half/full duplex mode for the RJ45 switched ports is user
dependent and changes (by auto-negotiation) to full or half duplex, depending
on which transmission speed is supported by the attached device.
Auto-Negotiation and Speed Sensing
All of Weidmüller Media Converter’s RJ45 Ethernet ports independently
support auto-negotiation for transmission speed in the 10BaseT and
100BaseTX modes, with operation according to the IEEE 802.3u standard.
This means that some nodes could be operating at 10 Mbps, while at the same
time, other nodes are operating at 100 Mbps.
Auto-negotiation takes place when an RJ45 cable connection is made, and then
each time a LINK is enabled. The Media Converter advertises its capability for
using either 10 Mbps or 100 Mbps transmission speeds, with the device at the
other end of the cable expected to advertise similarly. Depending on what type
of device is connected, this will result in agreement to operate at a speed of
either 10 Mbps or 100 Mbps.
If the Media Converter’s RJ45 Ethernet port is connected to a non-negotiating
device, then the default values 10 Mbps speed and half-duplex mode will be set,
as required by the IEEE 802.3u standard.
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