Endress+Hauser Liquiphant FTL31 IO-Link Operating Instructions Manual page 30

Commissioning
LEDs on housing cover with M12 plug, IO-Link
Operating modes
Sensor
1
3
1: green (gn)
2: red (rd)
3: yellow (ye) 2
4: yellow (ye) 1
LEDs on M12 plug (signals status of switch outputs)
Operating modes
Sensor
1
3
1: green (gn)
2: yellow (ye)2
3: yellow (ye)1
30
MAX
free
2
4
A0037920
free
2
MIN
covered free
MAX
covered free
Liquiphant FTL31 IO-Link
Warning
covered
MIN Warning
covered
―
―
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Endress+Hauser
Fault
Fault