SICK GSE6L Series, Operating Instructions Manual

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7.4 Additional functions
Test input
Test input: The GSE6L sensors feature a test input (“TI” or “Test” on the connection dia‐
gram), which can be used to switch the sender off and therefore check that the sensor
is functioning correctly: If female cable connectors with LED indicators are used, you
must ensure that the TI is assigned accordingly.
There must be no object between the sender and receiver; activate the test input (see
the connection diagram, TI at 0 V). The send LED is shut down or the detection of an
object is simulated. Use the following table to check the function. If the switching output
fails to behave in accordance with the following table, check the application conditions.
See section Fault diagnosis.
Table 5: Test input
GS6L
The test input is always con‐
nected to Q
Test input, low active (
≤
2 mA)
+ (L+)
Test
– (M)
+ (L+)
Test
– (M)
8 Troubleshooting
The Troubleshooting table indicates measures to be taken if the sensor stops working.
Table 6: Troubleshooting
LED indicator/fault pattern Cause Measures
Yellow LED does not light up
even though the light beam is
aligned to the receiver and
there is no object in the path of
the beam
No voltage or voltage below
the limit values
Check the power supply,
check all electrical connec‐
tions (cables and plug connec‐
tions)
Voltage interruptions Ensure there is a stable power
supply without interruptions
Sensor is faulty If the power supply is OK,
replace the sensor
No object in beam path, no out‐
put signal
Test input (Test) is not con‐
nected properly
Check connection of the test
input. When using female
cable connectors with LED
indicators, make sure the test
input is assigned correspond‐
ingly.
Yellow LED flashes Sensor is still ready for opera‐
tion, but the operating condi‐
tions are not ideal
Check the operating condi‐
tions: Fully align the beam of
light (light spot) with the
receiver. / Clean the optical
surfaces / If the potentiome‐
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8025390 | SICK
Subject to change without notice
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