La siguiente imagen muestra los LEDs de la versión PROFINET-IO:
[1]
LED "L/A" (X43_1/X43_2)
[4]
LED "USR"
[7]
LED "L/A" (X4233_1)
[2]
LED "PLC"
[5]
LED "BF"
[8]
LED "L/A" (X4233_2)
[3]
LED "IEC"
[6]
LED "US1"
