LED indicator/fault pattern /
LED indicator/fault pattern
Cause /
Cause
Measures /
Measures
Green LED does not light up /
Green LED does not light up
Sensor is faulty /
Sensor is faulty
If the power supply is OK, re‐
place the sensor /
If the power supply is OK, re‐
place the sensor
Green LED lights up, no output
signal when object is detec‐
ted /
Green LED lights up, no output
signal when object is detected
Test input (TI) is not connec‐
ted properly /
Test input (TI) is not connec‐
ted properly
See the note on connecting
the TI /
See the note on connecting
the TI
Yellow LED flashes /
Yellow LED flashes
Sensor is still ready for opera‐
tion, but the operating conditi‐
ons are not ideal /
Sensor is still ready for opera‐
tion, but the operating conditi‐
ons are not ideal
Check the operating conditi‐
ons: Fully align the beam of
light (light spot) with the recei‐
ver. / Clean the optical surfa‐
ces . / Readjust the sensitivi‐
ty / Check sensing range and
adjust if necessary; see gra‐
phic H. /
Check the operating conditi‐
ons: Fully align the beam of
light (light spot) with the recei‐
ver. / Clean the optical surfa‐
ces . / Readjust the sensitivi‐
ty / Check sensing range and
adjust if necessary; see gra‐
phic H.
Yellow LED lights up, no object
in the path of the beam /
Yellow LED lights up, no object
in the path of the beam
The beam of light of a photo‐
electric through-beam sensor
hits the receiver of another
(neighboring) photoelectric
through-beam sensor /
The beam of light of a photo‐
electric through-beam sensor
hits the receiver of another
(neighboring) photoelectric
through-beam sensor
Swap the sender and receiver
arrangement at every se‐
cond photoelectric through-
beam sensor and ensure that
there is sufficient distance
between the through-beam
photoelectric sensors /
Swap the sender and receiver
arrangement at every se‐
cond photoelectric through-
beam sensor and ensure that
there is sufficient distance
between the through-beam
photoelectric sensors
9
Disassembly and disposal
The sensor must be disposed of according to the applicable country-specific regulati‐
ons. Efforts should be made during the disposal process to recycle the constituent ma‐
terials (particularly precious metals).
10
Maintenance
SICK sensors are maintenance-free.
We recommend doing the following regularly:
•
Clean the external lens surfaces
•
Check the screw connections and plug-in connections
No modifications may be made to devices.
DISASSEMBLY AND DISPOSAL
9
8017641 | SICK
Subject to change without notice
5
