Siemens Electrical Lean Switch - Manual (Page 34)

Ports and Displays
Industrial Ethernet
34 A5E00152007-03
4.3.3 Displays
Power display (green LED)
The status of the power supply is signaled by a green LED:
Status Meaning
lit green Power supply L+ is connected
Not lit Power supply L+ is not connected or <14 V
Port status display (green/yellow LEDs)
The status of the ports is signaled by eight LEDs:
Status Meaning
Port 1 to 8 LED lit green TP link exists, no data reception
Port 1 to 8 LED lit yellow TP link exists, receiving data at TP port
Port 1 to 8 LED flashes green TP link exists, sending data