Description of the device
3.3 LED display
3.3
LED display
Information on operating status and data transfer
On the front of the housing, several LEDs provide information on the operating status of the
device:
LED
L1
L2
PoE
P1
P2
20
Color
Meaning
Off
Power supply too low
Green
Power supply is applied
Off
Power supply too low
Green
Power supply is applied
Green
Power supply using Power over Ethernet.
Green
There is a connection via the first Ethernet interface (Link).
Green and yel-
Data transfer via the first Ethernet interface.
low flashing
alternately
Green
There is a connection via the second Ethernet interface (Link).
Green and yel-
Data transfer via the second Ethernet interface.
low flashing
alternately
SCALANCE W778-1 /W738-1
Operating Instructions, 01/2107, C79000-G8976-C450-01