17
The LED display on the M12 sockets displays the diagnosis for the corresponding socket.
L/A
X1
Designation
Condition
Function
L/A
Off
No Ethernet device is connected to the port
Green
An Ethernet device is connected to the port
Green flashing
An Ethernet device which is currently communicating
is connected to the port
0
IO
0.0
IO
1.0
Designation
Condition
Function
IO 0.0/IO 1.0
Yellow
Input
UB at Pin 2/4
Output
Junctioning output at UB Pin 2/4
Red
Output
Short circuit at Pin 2/4
