Input/Output Modules - Festo FB16 Electronic Manual

VIFB16 - 03/05
Green LEDs
(switching status
display of inputs)
LED
Yellow out
or
Green out
Yellow alight
or
Green alight
Red out
Red alight
Fig. 5/6: LED displays of input/output modules
5-8
5. Diagnosis/error treatment

Input/output modules

There are one or two LEDs (status displays)
next to the relevant connections on the in-
put/output modules. The colours of these LEDs
are:
•
green (status display of digital inputs)
•
yellow (status display of digital outputs)
•
red (error display of digital outputs)
The current signal at each input/output is
shown by means of the yellow and green LEDs.
The red LEDs of the outputs indicate short
circuit or overload of the relevant output.
Red LEDs
(Short circuit/overload
display of outputs)
I8 I8 I4
Status
Logic 0
(no signal)
Logic 1
(signal applied)
Output without short circuit/overload
Short circuit/overload at relevant output
O4
Yellow LEDs
(switching status
display of outputs)
0506b