Displays

Statuses of the LEDs:

LED	Status	Color	LED = OFF	LED = ON
Inputs I0…I7	Digital input	Yellow	Input is OFF	Input is ON (the input voltage is even displayed if the supply voltage of the module is OFF)
Outputs O0…O7	Digital output	Yellow	Output is OFF	Output is on (the output voltage is only displayed if the supply voltage of the module is ON)