dark switching
light switching
1
2
t = 2
Timer stages can be set from 0 to 2 seconds.
Light/dark switch: The sensor is in light switching mode when optional light/dark poten‐
tiometer is rotated to the “L” position. The sensor is in dark switching mode when optio‐
nal light/dark potentiometer is rotated to the “D” position. The green power supply LED
will flash once when the mode is changed.
Test input: The HSE18 sensor features a test input ("TE" or "Test" on the connection dia‐
gram [B]), which can be used to check that the sensor is functioning correctly: If female
cable connectors with LED indicators are used, you must ensure that the TE is assigned
accordingly.
There must be no object between the sender and receiver; activate the test input (see
the connection diagram [B], TE at 0 V). The send LED is shut down or the detection of
an object is simulated. Refer to Graphics C and G to check the function. If the switching
output fails to behave in accordance with Graphic C, check application conditions. See
section Fault diagnosis.
6
Fault diagnosis
Table indicates which measures are to be taken if the sensor stops working.
7
Table Fault diagnosis
LED indicator/fault pattern /
LED indicator/fault pattern
Cause /
Cause
Measures /
Measures
Green LED does not light up /
Green LED does not light up
No voltage or voltage below
the limit values /
No voltage or voltage below
the limit values
Check the power supply,
check all electrical connecti‐
ons (cables and plug connecti‐
ons) /
Check the power supply,
check all electrical connecti‐
ons (cables and plug connecti‐
ons)
Green LED does not light up /
Green LED does not light up
Voltage interruptions /
Voltage interruptions
Ensure there is a stable power
supply without interruptions /
Ensure there is a stable power
supply without interruptions
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; if Health is
present then take note of the
corresponding output signal; if
Alarm is present then take note
of the corresponding output
signal /
Sensor is still ready for opera‐
tion, but the operating conditi‐
ons are not ideal/additionally
with health output: power sup‐
ply interrupted /
Check the operating conditi‐
ons: Fully align the beam of
light (light spot) with the recei‐
ver. / Clean the optical surfa‐
ces . / Readjust the sensitivity
(potentiometer) / If the poten‐
tiometer is set to the max.
FAULT DIAGNOSIS
6
8017854 | SICK
Subject to change without notice
5
