Siemens Electrical Lean Switch - Manual (Page 31)

Ports and Displays
Industrial Ethernet
A5E00152007-03
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4.2.3 Displays
Power Display (green and red LEDs)
The status of the ELS TP40M is indicated by a green and a red LED:
Status Meaning
lit green Power supply L+ is connected
not lit Power supply L+ is not connected or <14 V
lit or flashing red The red LED should go off after "Power on" after approximately one
minute otherwise the ELS TP40M device is defective.
Port Status Display (green/yellow LEDs)
The status of the ports is signaled by four LEDs:
Status Meaning
Port 1 to 4 LED lit green TP link exists, no data reception
Port 1 to 4 LED lit yellow TP link exists, receiving data at TP port
Port Status Display During Startup
Following startup, the LEDs are lit in the order shown:
● Red LED (approx. 0.5 s)
● Green power LED (green) and all yellow LEDs for approx. 13 s
● Red/green LEDs flash quickly for approx. 1.5 s
The device is operational after a further 3 seconds.