Siemens SIMATIC NET SCALANCE XR-300WG Operating Instructions Manual page 28

Description of the device
4.4 LED display
The upper green LED shows the status of the link.
LED color
Green
-
The lower yellow LED shows the status of data reception.
LED color
Yellow
-
Pluggable transceiver slots
There is an LED for each plug-in transceiver slot.
LED color
Green
Yellow
-
28
LED status Meaning
Lit link exists
Off No link exists
LED status Meaning
Flashing Data transfer at the port
Off No data transfer at the port
LED status Meaning
Lit Link exists
Flashing Data transfer at the port
Off No link exists
Operating Instructions, 03/2021, C79000-G8976-C454-07
SCALANCE XR-300WG