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AL4142
Remote I/O module 16 DI
20
7.1.2 Ethernet
LED
Description
Colour
State
Description
LNK
Status of the connection
Green
Off
No Ethernet connection
On
Ethernet connection established
ACT
Status of the data transmis-
sion
Yellow
Off
No data transmission
flashes
Data transmission
7.1.3 Voltage supply
LED
Description
Colour
State
Description
US
Voltage supply sta-
tus
-
Off
No supply voltage is applied or the applied supply voltage is
too low
Green
On
Supply voltage applied
red
On
Overvoltage, undervoltage, short circuit at sensor supply
7.1.4 Process connections
LED
Description
Colour
State
Description
DI1
Digital input signal
level (pin 4)
Yellow
Off
Digital input - pin 4: LOW
On
Digital input - pin 4: HIGH
DI2
Digital input signal
level (pin 2)
Yellow
Off
Digital input - pin 2: LOW
On
Digital input - pin 2: HIGH