Siemens DI 8x24VAC/48VUC BA Manual page 20

Meaning of the LEDs
The tables below explain the meaning of the Status and fault displays.
LED DIAG
Table 5- 1
LED DIAG
LED channel status
Table 5- 2
LED channel
LED PWR
Table 5- 3
Digital input module DI 8x24VAC/48VUC BA (6ES7131-6CF00-0AU0)
Manual, 07/2018, A5E42285997-AA
LED DIAG fault display
Meaning
Backplane bus supply of the ET 200SP not OK
Off
Module parameters not assigned
Flashing
Module parameters assigned
On
Module diagnostics is available
Flashing
Channel status LED status and fault display
Meaning
status
Process signal = 0
Off
Process signal = 1
On
LED PWR status display
LED PWR Meaning
No supply voltage L
Off
Supply voltage L present
On
Interrupts/diagnostics alarms
5.1 Status and fault displays
19