SICK C4000 Select

Operating Instructions Chapter 10
C4000 Select
8012247/RI61/2007-11-30 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 53
Fault diagnosis
LED Name Display Possible cause Rectification
OUTPUT  Off No operating voltage, or
voltage too low
 Check the voltage supply
and activate, if necessary.
EXT I/O  Red Extended I/O safety inputs
are inactive (low) i.e. OFF
 Check guest device(s) to
ensure that their outputs
are active (high).
 Check wiring for errors.
 Check DIP switches to
ensure that the settings
are correct
ALIGNMENT
LEDs
Not all
LEDs are
 Green
Not all beams are aligned
between sender and
receiver units
 Check alignment and
make any necessary
adjustments in order to
have all five alignment
LEDs  Green
 Clean C4000 Select front
windows
Tab.
27
:
C4000 Select
LED
troubleshooting on receiver
unit