SICK WE-2B 4 Series, Руководство по эксплуатации

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Possible causes: sensor is contaminated, sensor is out of alignment. PNP: alarm → M
signal reserve > 50% LOW, NPN: alarm → L+ signal reserve > 50% HIGH. The LED indi‐
cator flashes in this case.
Table 7: Alarm
Alarm ( ≤ 100 mA)
+ (L+)
Alarm
– (M)
+ (L+)
Alarm
– (M)
Test input
Test input: the WS24-2B / -V sensors feature a test input (“TI” or “Test” on the connec‐
tion diagram [
see "WS/WE24-2Bxxx, WS/WE24-2Vxxx", page 7 and see table 8 ]), which
can be used to switch the sender off and, therefore, check that the sensor is function‐
ing correctly: if female cable connectors with LED indicators are used, you have to
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 [
see "WS/WE24-2Bxxx, WS/WE24-2Vxxx", page 7 and see
table 8 ], TE at 0 V). The send LED is shut down or the detection of an object is simu‐
lated. 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 8: Test
Test
+ (L+)
Test
– (M)
+ (L+)
Test
– (M)
8 Commissioning
1 Alignment
Align the sender with the receiver. Select the position so that the red emitted light beam
hits the receiver. Tip: use white paper or a reflector as an alignment aid. The sender must
have a clear view of the receiver with no object in the path of the beam [see
figure 4 ]. You
must ensure that the optical openings (front screen) of the sensors are completely clear.
7
ADDITIONAL FUNCTIONS
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8008782.14BT | SICK
Subject to change without notice