SICK Bluetooth WLA16, Operating Instructions Manual

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6 Additional functions
Alarm
Alarm output: The sensor (WLA16) features a pre-failure notification output (“Alarm” in
connection diagram
table 5 ), which issues a notification if the sensor is only ready for
operation to a limited extent. The LED indicator flashes in this case. Possible causes:
Sensor or reflector is contaminated, sensor is out of alignment. In the good state: LOW
(0), if excessively contaminated HIGH (1).
Health
Health output: The sensor (WLA16) features a pre-failure notification output (“Health”
in connection diagram [
see table 5 ]), which issues a notification if the sensor is 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 5: Alarm / Health
Alarm ( ≤ 100 mA) Health ( ≤ 100 mA)
+ (L+)
Alarm
‒ (M)
+ (L+)
Health
‒ (M)
+ (L+)
Alarm
‒ (M)
+ (L+)
Health
‒ (M)
Test input
Test input: The WLA16 sensors feature a test input (“TI” or “Test” on the connection
diagram [
see table 2 , table 3 and table 6 ]), which can be used to switch the sender off
and, therefore, check that the sensor is functioning correctly: If female cable connec‐
tors with LED indicators are used, you have to ensure that the TI is assigned accord‐
ingly.
It is important that there is no object between the sensor and reflector; activate the test
input (see the connection diagram [
see table 2 , table 3 and table 6 ]). The send LED is
shut down or the detection of an object is simulated. Refer to table 6 to check the func‐
tion. If the switching output fails to behave in accordance with table 6 , check the appli‐
cation conditions. See section Fault diagnosis.
Table 6: Test
Test → M Test → L+
+ (L+)
Test
– (M)
+ (L+)
Test
– (M)
ADDITIONAL FUNCTIONS
6
8020348.14CS | SICK
Subject to change without notice
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