Troubleshooting - SICK WT24-2 Manual De Operación

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Troubleshooting

8008784.Z474 | SICK
Subject to change without notice
WT24-2V550S12: M12 male connector, 5-pin, glass front screen, dynamic power heat‐
ing on the rear side of the glass, current consumption: 150 mA. The dynamic power
heating is automatically switched on and off depending on the ambient temperature
(23-26 °C). For the use of quick temperature changes in the range of <0 °C...+10 °C
WT24-2B240S13: glass front screen
WT24-2B420S14: sensing range max.: 30...3000 mm on white (90% remission), with
timer unit: adjustable 0.6...1.3 sec, glass front screen
WT24-2V510S15: M12 male connector, 5-pin: Pin1: L+, Pin2: alarm, Pin3: M, Pin4: Q
or Q/, Pin5: test input (TI)
WT24-2R210S17: sensing range, typ. max.: 100...2000 mm on white (90% remission),
operating range or background suppression: can be adjusted between about 1200...
1600 mm, increased resistance in the event of extreme impact load, PG9 connector
WT24-2R250S20: PG9 connector
WT24-2R220S21: PG9 connector
WT24-2B420S22: sensing range, typ. max.: 300...900 mm on white (90% remission),
operating range: can be adjusted between about 300...900 mm, bonding of the wires in
the terminals, with washer for cover closure
WT24-2B410S25: M12 male connector, 4-pin: Pin1: L+, Pin2 (test input); not con‐
nected Pin3: M, Pin4: Q or Q/
WT24-2B440T01: housing is coated with Teflon
The Troubleshooting table indicates which measures are to be taken if the sensor stops
working.
Table 10: Troubleshooting
LED indicator/fault pattern
Yellow LED does not light up
even though the light beam is
aligned to the object and the
object is within the set sensing
range
Object in beam path, no output
signal
Yellow LED flashes; if Alarm is
present then take note of the
corresponding output signal
Yellow LED lights up, no object
in the path of the beam
Cause
No voltage or voltage below
the limit values
Voltage interruptions
Sensor is faulty
Test input (Test) is not con‐
nected properly
Sensor is still ready for opera‐
tion, but the operating condi‐
tions are not ideal
The sensing range distance is
too large
TROUBLESHOOTING
Measures
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
Check connection of the test
input. When using female
cable connectors with LED
indicators, make sure the test
input is assigned correspond‐
ingly.
Check the operating condi‐
tions: Fully align the beam of
light (light spot) with the
object / Clean the optical sur‐
faces / Check sensing range
and adjust if necessary, see
Figures 6-8 and table 8.
Reduce the sensing range,
see Figures 6-8 and table 8
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