SICK WLD26 Instrucciones De Operación página 8

8020356.19RH / 15.01.2021 | SICK
Subject to change without notice
Health output: The sensor (WLD26) features a pre-failure notification output ("Health"
in the connection diagram
only ready for operation to a limited extent or the cable has been interrupted. Possible
causes: Sensor or reflector is contaminated, sensor is out of alignment, cable is dam‐
aged. In the good state: HIGH (1), if excessively contaminated or in the event of cable
interruption LOW (0). The yellow LED indicator flashes in this case.
Table 4: Alarm
Test input
Test input: The sensors WLD26 feature a test input ("TI" or "Test" on the connection
diagram [see table 2]), 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 have to ensure that the TI is assigned accordingly.
It is important that there is no object between the sensor and reflector; activate the test
input (see the connection diagram
The send LED is shut down or the detection of an object is simulated. Refer to
to check the function. If the switching output fails to behave in accordance with the
graphic, check the application conditions,
Table 5: Test
[see table 2]), which issues a notification if the sensor is
Alarm (≤ 100 mA)
+ (L+)
Alarm
‒ (M)
+ (L+)
Alarm
‒ (M)
[see table 2]).
see "Troubleshooting", page
Test → M
+ (L+)
Test
– (M)
+ (L+)
Test
– (M)
ADDITIONAL FUNCTIONS
Health (≤100 mA)
+ (L+)
Health
‒ (M)
+ (L+)
Health
‒ (M)
table 5
9.
Test → L+
+ (L+)
Test
– (M)
+ (L+)
Test
– (M)
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