56
O P E R A T I N G I N S T R U C T I O N S | RAY26
LED/fault pattern
Green LED flashes
Switching outputs do not
behave in accordance with
see
table 12, page 44
and
see
table 13, page 45
The blue LEDs are very close
together
Yellow LED flashes
Yellow LED does not light up
even though the light band is
aligned to the reflector and
there is no object in the path
of the beam
Cause
IO-Link communication
a) IO-Link communication
b) Change of the configuration
c) Short-circuit
Front screen and/or reflector
is contaminated.
Distance between sensor and
reflector is too large / light
band is not completely aligned
to the reflector / reflector is
not suitable / front screen
and/or reflector is contami‐
nated
No voltage or voltage below
the limit values
Voltage interruptions
Sensor is faulty
Measures
None
a) None
b) Adjustment of the configu‐
ration
c) Check electrical connec‐
tions
Cleaning of the optical surfa‐
ces (sensor and reflector).
Check sensing range / check
alignment / SICK reflector is
recommended / Cleaning of
the optical surfaces (sensor
and reflector)
Check the power supply,
check all electrical connec‐
tions (cables and plug connec‐
tions)
Ensure there is a stable power
supply without interruptions
If the power supply is OK,
replace the sensor
8022178.1COX /2021-11-04 | SICK
Subject to change without notice