SICK WLA26 00 Series User manual

OPERATING INSTRUCTIONS
WLA26

OPERATING INSTRUCTIONS
WLA26
de
en
es
fr
it
ja
pt
ru
zh

Described product
W26
WLA26
Manufacturer
SICK AG
Erwin-Sick-Str. 1
79183 Waldkirch
Germany
Legal information
This work is protected by copyright. Any rights derived from the copyright shall be
reserved for SICK AG. Reproduction of this document or parts of this document is
only permissible within the limits of the legal determination of Copyright Law. Any modi‐
fication, abridgment or translation of this document is prohibited without the express
written permission of SICK AG.
The trademarks stated in this document are the property of their respective owner.
© SICK AG. All rights reserved.
Original document
This document is an original document of SICK AG.
2006/42/EC
NO
SAFETY
28020357.19RH / 15.01.2021 | SICK
Subject to change without notice

Contents
1 Safety information............................................................................ 4
1.1 General safety notes................................................................................ 4
1.2 Notes on UL approval............................................................................... 4
2 Intended use...................................................................................... 4
3 Operating and status indicators...................................................... 4
4 Mounting............................................................................................. 5
5 Electrical installation........................................................................ 5
6 Additional functions.......................................................................... 7
7 Commissioning.................................................................................. 8
7.1 Alignment.................................................................................................. 8
7.2 Check the application conditions............................................................ 9
7.3 Sensing range setting............................................................................... 11
7.4 Time function setting................................................................................ 12
7.5 Setting light/dark switching..................................................................... 13
8 Process data structure..................................................................... 13
9 Troubleshooting................................................................................. 13
10 Disassembly and disposal............................................................... 14
11 Maintenance...................................................................................... 14
12 Technical data.................................................................................... 15
12.1 Dimensional drawings.............................................................................. 15
CONTENTS
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Subject to change without notice 3

1 Safety information
1.1 General safety notes
■Read the operating instructions before commissioning.
■
Connection, mounting, and configuration may only be performed by trained
specialists.
■
2006/42/EC
NO
SAFETY
Not a safety component in accordance with the EU Machinery Directive.
■
Do not install the sensor at locations that are exposed to direct sunlight
or other weather influences, unless this is expressly permitted in the operating
instructions.
■These operating instructions contain information required during the life cycle of
the sensor.
1.2 Notes on UL approval
The device shall be supplied from an isolating transformer having a secondary overcur‐
rent protective device that complies with UL 248 to be installed in the field rated either:
a) max 5 amps for voltages 0 ~ 20 V (0 ~ 28.3 V peak), or
b) 100 / Vp for voltages of 20 ~ 30 V (28.3 ~ 42.4 V peak).
Alternatively, they can be supplied from a Class 2 power supply.
UL Environmental Rating: Enclosure type 1
2 Intended use
The WLA26 is an opto-electronic photoelectric retro-reflective sensor (referred to as
“sensor” in the following) for the optical, non-contact detection of objects, animals, and
persons. A reflector is required for it to function. If the product is used for any other
purpose or modified in any way, any warranty claim against SICK AG shall become void.
3 Operating and status indicators
WLA26x-xxxxxx00 WLA26x-xxxxxx01 WLA26x-xxxxxx02
1
2
3
1
23
5
1
23
4
1 SAFETY INFORMATION
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Subject to change without notice

WLA26x-xxxxxx30 WLA26x-xxxxxx31 WLA26x-xxxxxx32
1
2
3
6
1
23
5
6
1
23
4
6
1BluePilot blue: alignment aid
2LED indicator yellow: status of received light beam
3LED indicator green: supply voltage active
4Press-turn element: time function adjustment
5Teach pushbutton: adjustment of light/dark switching
6Teach-Button: adjusting the sensitivity
4 Mounting
Mount the sensor and the reflector using suitable mounting brackets (see the SICK
range of accessories). Align the sensor and reflector with each other.
Note the sensor’s maximum permissible tightening torque of < 1,3 Nm.
5 Electrical installation
The sensors must be connected in a voltage-free state. The following information must
be observed, depending on the connection type:
– Male connector connection: Note pin assignment
– Cable: wire color
Only supply/switch on the voltage once all electrical connections have been estab‐
lished.
Explanations of the connection diagram (following tables):
Alarm = alarm output
Health = alarm output
MF (pin 2 configuration) = external input, teach-in, switching signal
QL1/C = switching output, IO-Link communication
Test = test input
UB: 10 ... 30 V DC
Table 1: Connections
Wxx26x- x4 xH x5 xI
1 = BN
2 = WH
3 = BU
4 = BK
5= GY
12
4 3
0.14 mm2
AWG26
12
4 3
5
0.14 mm2
AWG26
MOUNTING 4
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Subject to change without notice 5

Wxx26x- x9 xB
1 = BN
2 = BU
3 = not connected
4 = BK
5= WH
6 = GY
7 = not connected
3 4
1
2 5
6
IN = 4 A
3
7
2
16
5
4
IN = 6 A
Table 2: DC
WLA26
x-
xxX6XxxxA00 xxX6Xx
xxA01-
A99
Push-
pull
xx161 xx162 xx163 xx165 xx168 xx16A xx16L xx16N xx16x
PNP xx861 xx862 xx863 xx865 xx868 xx86A xx86L xx86N xx86x
1 = BN + (L+)
2 = WH MF
3 = BU - (M)
4 = BK QL1/C
Default:
MF
QQAlarm Alarm Test →
L+
no func‐
tion
Test →
L+
no func‐
tion
www.sic
k.com
80227
09
Default:
QL1/C
QQQQQ Q Q Q www.sic
k.com
80227
09
Table 3: DC
WLA26x- xxXXXxxxZZZ
Push-pull xx111 xx112 xx114 xx116 xx421 xx422 xx721 xx722
PNP xx811 xx812 xx814 xx816 xxB21 xxB22 - -
BN + (L+)
WH QQHealth Health Q QQQ
BU - (M)
BK QQQQQQQQ
GR - - - - Test →
L+
Test →
L+
Test →
M
Test →
M
5 ELECTRICAL INSTALLATION
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Subject to change without notice

Table 4: Push-pull, PNP, NPN
Push-pull
PNP
NPN
+ (L+)
Q ≤ 100 mA
‒ (M)
Push-pull
PNP
NPN
+ (L+)
Q ≤ 100 mA
‒ (M)
Push-pull
PNP
NPN
+ (L+)
Q≤ 100 mA
‒ (M)
Push-pull
PNP
NPN
+ (L+)
Q≤ 100 mA
‒ (M)
6 Additional functions
Alarm
Alarm output: The sensor (WLA26) features a pre-failure notification output (“Alarm” in
the connection diagram [see table 2]), which issues a notification if the sensor is only
ready for operation to a limited extent. The LED 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 (WLA26) features a pre-failure notification output (“Health”
in the connection diagram [see table 2]), 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.
ADDITIONAL FUNCTIONS 6
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Subject to change without notice 7

Table 5: Alarm
Alarm (≤ 100 mA) Health (≤100 mA)
+ (L+)
Alarm
‒ (M)
+ (L+)
Health
‒ (M)
+ (L+)
Alarm
‒ (M)
+ (L+)
Health
‒ (M)
Test input
Test input: The sensors WLA26 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 [see table 2]).
The send LED is shut down or the detection of an object is simulated. Refer to table 6
to check the function. If the switching output fails to behave in accordance with the
graphic, check the application conditions, see "Troubleshooting", page 13.
Table 6: Test
Test → M Test → L+
+ (L+)
Test
– (M)
+ (L+)
Test
– (M)
+ (L+)
Test
– (M)
+ (L+)
Test
– (M)
7 Commissioning
7.1 Alignment
Align the sensor with a suitable reflector. Select the position so that the red emitted
light beam hits the center of the reflector. The sensor must have a clear view of the
reflector, with no object in the path of the beam [see figure 1]. You must ensure that the
optical openings of the sensor and reflector are completely clear.
6 ADDITIONAL FUNCTIONS
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Subject to change without notice

Table: Alignment
Figure 1: Alignment 1 Figure 2: Alignment 2
7.2 Check the application conditions
WLA26 are photoelectric retro-reflective sensors in which the autocollimation principle
has been combined with a multi-receiver element, thereby ensuring the greatest possi‐
ble resistance to depolarizing objects combined with a very high sensing range. This
means the WLA26 has a high operating reserve (insensitivity to dust) and does not
exhibit any switching errors with depolarizing objects.
Adjust the distance between the sensor and the reflector according to the correspond‐
ing diagram [see table 7] (x = sensing range, y = operating reserve).
NOTE TIP:
Should switching errors nevertheless arise due to extremely depolarizing objects, the
WLA26 can also be adapted to these extreme conditions and the switching errors
suppressed by means of a teach-in (via IO-Link or using the Teach-in button on the
housing).
Table 7: Application conditions
0
100
10
1
65
2
1
1,000
4
(13.12)
8
(26.25)
20
(65.62)
16
(52.49)
12
(39.37)
Function reserve
Distance in m (feet)
Sensing range
WLA26P-xxxxx1xx
4
3
Figure 3: Characteristic line 1: Standard
reflector
1Reflector PL20A
2Reflector PL22
Distance in m (feet)
Sensing range Sensing range typ. max.
1
2
3
4
5
6
0 8
(26.25)
12
(39.37)
4
(13.12)
16
(52.49)
20
(65.62)
5.5 70
11.5 16
0
12 17
0
12 18
0
18
10
0
8 10
0
15
Figure 4: Bar graph 1: Standard reflector
1Reflector PL20A
2Reflector PL22
3Reflector PL250
4Reflector PL30A
5Reflector PL40A
6Reflector PL80A, C110A
COMMISSIONING 7
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3Reflector PL250
4Reflector PL30A
5Reflector PL40A
6Reflector PL80A, C110A
0
100
10
1
3
2
1
1,000
4
(13.12)
Function reserve
Distance in m (feet)
8
(26.25)
16
(52.49)
12
(39.37)
Sensing range
WLA26P-xxxxx1xx
Figure 5: Characteristic line 2: Reflective tape
1Reflective tape REF-DG
2Reflective tape REF-IRF-56
3Reflective tape REF-AC1000
Distance in m (feet)
Sensing range Sensing range typ. max.
1
2
30
0
1.5 3
0
2.5 5
0
8 12
0
8
(26.25)
12
(39.37)
2
(6.56)
6
(19.69)
10
(32.81)
4
(13.12)
14
(45.93)
Figure 6: Bar graph 2: Reflective tape
1Reflective tape REF-DG (50 x 50 mm)
2Reflective tape REF-IRF-56 (50 x
50 mm)
3Reflective tape REF-AC1000 (50 x
50 mm)
0
100
10
1
4
3
1
2
1,000
Function reserve
4
(13.12)
8
(26.25)
20
(65.62)
16
(52.49)
12
(39.37)
Distance in m (feet)
Sensing range
WLA26P-xxxxx1xx
Figure 7: Characteristic line 3: Fine triple
reflectors
1Reflector PL10FH-1
2Reflector PL10F
3Reflector PL20F
4Reflector P250F
Sensing range
1
2
3
40
0
5.5 80
4.5 6.5
0
7 10
0
10 13
0
Distance in m (feet)
Sensing range typ. max.
8
(26.25)
12
(39.37)
2
(6.56)
6
(19.69)
10
(32.81)
4
(13.12)
14
(45.93)
Figure 8: Bar graph 3: Fine triple reflectors
1Reflector PL10FH-1
2Reflector PL10F
3Reflector PL20F
4Reflector P250F
7 COMMISSIONING
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Subject to change without notice

0
100
10
1
5
2
3
41
1,000
Function reserve
4
(13.12)
8
(26.25)
20
(65.62)
16
(52.49)
12
(39.37)
Distance in m (feet)
Sensing range
WLA26P-xxxxx1xx
Figure 9: Characteristic line 4: Chemi‐
cal-resistant reflector
1Reflector PL10F CHEM
2Reflector P250H
3Reflector P250 CHEM
4Reflector PL20 CHEM
5Reflector PL40A Antifog
Distance in m (feet)
Sensing range Sensing range typ. max.
1
2
3
4
50
0 8
(26.25)
12
(39.37)
2
(6.56)
6
(19.69)
10
(32.81)
4
(13.12)
14
(45.93)
2 30.2
7 100
6 8
0
3.5 5
0
11 14
0
Figure 10: Bar graph 4: Chemical-resistant
reflector
1Reflector PL10F CHEM
2Reflector P250H
3Reflector P250 CHEM
4Reflector PL20 CHEM
5Reflector PL40A Antifog
7.3 Sensing range setting
WLA26x-xxxxxx3xAxx with teach-in button:
There must not be any objects located between the WLA26 and the reflector. The
sensitivity is reduced by pressing the teach-in button (approx. 1-3 sec.). This primarily
suppresses false switching to extremely depolarizing objects. The sensing range is also
reduced, and therefore the operating reserve as well. Lead an object into the path of
the beam. The yellow LED goes out, meaning the object is detected and the setting is
correct.
COMMISSIONING 7
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Subject to change without notice 11

1...3 sec.
1
2
Figure 11: WLA26x-xxxxxx3xAxx, adjusting the sensing range with teach-in button
7.4 Time function setting
1
0
T1
T2
M
T4
T3
t
t
t t t t
t t t t
t t t tt
t t
Input signal
0
T1
T2
T3
T4
M = Manual (specific setting via IO-Link)
1 ms 30.000 ms
2
7 COMMISSIONING
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Subject to change without notice

7.5 Setting light/dark switching
1
L
D
M
Llight switching
DDark switching
Mmanual (specific setting via IO-Link)
8 Process data structure
WLA26x-xxxxxxxxAxx:
A00 A70 A71 A72 A73 A75
IO-Link V1.1
Process
data
2 bytes 4 bytes
Byte 0: bits 15... 8
Byte 1: bits 7... 0
Byte 0: bits 31...
24
Byte 1: bits 13...
16
Byte 2: bits 15...
8
Byte 3: bits 7... 0
Bit 0 / Data
type
QL1 / Boolean
Bit 1 / Data
type
QL2 / Boolean Qint.1 /
Boolean
QL2 /
Boolean
Qint.1 / Boolean
Bit... /
Descrip‐
tion / Data
type
2 ...15 /
[empty]
2 ...15 /
[time mea‐
surement
value] /
UInt 14
2 … 15 /
[counter
value] /
UInt 14
2 … 15 /
[length /
speed
measure‐
ment] /
SInt14
2 /
Qint.1 /
Boolean
2 … 7 / [empty]
Bit... /
Descrip‐
tion / Data
type
3 … 15 /
[time mea‐
surement
value] /
UInt13
8 … 31 / [carrier
load] / UInt 24
9 Troubleshooting
The Troubleshooting table indicates measures to be taken if the sensor stops working.
COMMISSIONING 7
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Subject to change without notice 13

LED indicator/fault pattern Cause Measures
Green LED flashes IO-Link communication None
Switching outputs do not
behave in accordance with
table 4
1. Change of the configuration
2. Short-circuit
1. Adjustment of the configura‐
tion
2. Check electrical connections
Not all blue LEDs light up. a) Insufficient alignment
b) Contamination of the opti‐
cal surfaces
c) Particles in the light beam
d) Distance between sensor
and reflector is too large
e) Reflector is not suitable
a) Check alignment
b) Cleaning of the optical sur‐
faces (sensor and reflector).
c) Avoid contamination in the
air as far as possible
d) Check sensing range
e) SICK reflector is recom‐
mended
Yellow LED flashes Distance between sensor
and reflector is too large /
light beam is not completely
aligned to the reflector /
reflector is not suitable / Front
screen and/or reflector is con‐
taminated.
Check sensing range / check
alignment / SICK reflector is
recommended / Cleaning of
the optical surfaces (sensor
and reflector).
10 Disassembly and disposal
The sensor must be disposed of according to the applicable country-specific regula‐
tions. Efforts should be made during the disposal process to recycle the constituent
materials (particularly precious metals).
NOTE
Disposal of batteries, electric and electronic devices
•According to international directives, batteries, accumulators and electrical or
electronic devices must not be disposed of in general waste.
•The owner is obliged by law to return this devices at the end of their life to the
respective public collection points.
•
WEEE: This symbol on the product, its package or in this document,
indicates that a product is subject to these regulations.
11 Maintenance
SICK sensors are maintenance-free.
We recommend doing the following regularly:
•Clean the external lens surfaces
•Check the screw connections and plug-in connections
No modifications may be made to devices.
Subject to change without notice. Specified product properties and technical data are
not written guarantees.
9 TROUBLESHOOTING
14 8020357.19RH / 15.01.2021 | SICK
Subject to change without notice

12 Technical data
WLA26P
Sensing range (with reflector PL80A) 0 m ... 12 m
Light spot diameter/distance Ø 80 mm / 5 m
Supply voltage UBDC 10 ... 30 V
Ripple ≤ 5 VSS
Current consumption ≤ 30 mA1)
< 50 mA2)
Output current Imax. ≤ 100 mA
Max. response time ≤ 500 μs3)
Switching frequency 1000 Hz4)
Enclosure rating5) see table 1:
x4, xH, x5, xI: IP66, IP67, IP696)
x9, xB: IP65
Protection class III
Circuit protection A, B, C, D7)
Ambient operating temperature –40 °C ... +60 °C8)
1) 16 VDC to 30 VDC, without load
2) 10 VDC to 16 VDC, without load
3) Signal transit time with resistive load in switching mode. Deviating values possible in COM2 mode.
4) With a light/dark ratio of 1:1 in switching mode. Deviating values possible in IO-Link mode.
5) Pursuant to EN 60529
6) Replaces IP69 K pursuant to ISO 20653: 2013-03
7) A = UB-connections reverse polarity protected
B = inputs and output reverse-polarity protected
C = Interference suppression
D = outputs overcurrent and short-circuit protected
8) Do not bend cables below 0°C.
12.1 Dimensional drawings
3
2
2
1
7.1 (0.28)
8.1 (0.32)
10.8 (0.43)
25 (0.98)
38.8 (1.53)
6.4
(0.25)
12.9
(0.51)
48.1 (1.89)
40 (1.57)
44.2 (1.74)
10
(0.39)
Ø 5.2 (0.2)
24.6 (0.97)
82.2 (3.24)
70 (2.76)
Ø 5.2 (0.2)
7.3
(0.29)
8.1 (0.32)
76.5 (3.01)
82.5 (3.25)
55.6 (2.19)
53.3 (2.1)
4
Figure 12: Dimensional drawing 1, cable
1Center of optical axis
2Fixing hole Ø 5.2 mm
3Connection
4Display and setting elements
M12
1
3
2
2
7.1 (0.28)
8.1 (0.32)
10.8 (0.43)
25 (0.98)
39 (1.54)
6.3 (0.25)
48.1 (1.89)
40 (1.57)
44.2 (1.74)
19.7
(0.78)
Ø 5.2 (0.2)
24.6 (0.97)
82.2 (3.24)
70 (2.76)
Ø 5.2 (0.2)
17
(0.67)
7.9 (0.31)
76.5 (3.01)
82.5 (3.25)
55.6 (2.19)
53.3 (2.1)
63.9 (2.52)
4
Figure 13: Dimensional drawing 2, male
connector
TECHNICAL DATA 12
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Subject to change without notice 15

BETRIEBSANLEITUNG
WLA26
de
en
es
fr
it
ja
pt
ru
zh

Beschriebenes Produkt
W26
WLA26
Hersteller
SICK AG
Erwin-Sick-Str. 1
79183 Waldkirch
Deutschland
Rechtliche Hinweise
Dieses Werk ist urheberrechtlich geschützt. Die dadurch begründeten Rechte bleiben
bei der Firma SICK AG. Die Vervielfältigung des Werks oder von Teilen dieses Werks
ist nur in den Grenzen der gesetzlichen Bestimmungen des Urheberrechtsgesetzes
zulässig. Jede Änderung, Kürzung oder Übersetzung des Werks ohne ausdrückliche
schriftliche Zustimmung der Firma SICK AG ist untersagt.
Die in diesem Dokument genannten Marken sind Eigentum ihrer jeweiligen Inhaber.
© SICK AG. Alle Rechte vorbehalten.
Originaldokument
Dieses Dokument ist ein Originaldokument der SICK AG.
2006/42/EC
NO
SAFETY
8020357.19RH / 15.01.2021 | SICK
Subject to change without notice 17

Inhalt
13 Zu Ihrer Sicherheit............................................................................. 19
13.1 Allgemeine Sicherheitshinweise.............................................................. 19
13.2 Hinweise zur UL Zulassung...................................................................... 19
14 Bestimmungsgemäße Verwendung............................................... 19
15 Bedien- und Anzeigeelemente........................................................ 19
16 Montage.............................................................................................. 20
17 Elektrische Installation..................................................................... 20
18 Zusatzfunktionen.............................................................................. 22
19 Inbetriebnahme................................................................................. 23
19.1 Ausrichtung............................................................................................... 23
19.2 Einsatzbedingungen prüfen..................................................................... 24
19.3 Einstellung Schaltabstand....................................................................... 26
19.4 Einstellung Zeitfunktionen....................................................................... 27
19.5 Einstellung Hell-/Dunkelschaltend.......................................................... 28
20 Prozessdatenstruktur........................................................................ 28
21 Störungsbehebung............................................................................ 28
22 Demontage und Entsorgung............................................................ 29
23 Wartung.............................................................................................. 29
24 Technische Daten.............................................................................. 30
24.1 Maßzeichnungen...................................................................................... 30
INHALT
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13 Zu Ihrer Sicherheit
13.1 Allgemeine Sicherheitshinweise
■Lesen Sie vor der Inbetriebnahme des Geräts die Betriebsanleitung.
■
Der Anschluss, die Montage und die Konfiguration des Geräts dürfen nur
von geschultem Fachpersonal vorgenommen werden.
■
2006/42/EC
NO
SAFETY
Bei diesem Gerät handelt es sich um kein sicherheitsgerichtetes Bauteil im
Sinne der EU-Maschinenrichtlinie.
■
Installieren Sie den Sensor nicht an Orten, die direkter Sonneneinstrahlung
oder sonstigen Wettereinflüssen ausgesetzt sind, ausser dies ist in der Betriebs‐
anleitung ausdrücklich erlaubt.
■Die vorliegende Betriebsanleitung enthält Informationen, die während des Lebens‐
zyklus der Lichtschranke benötigt werden.
13.2 Hinweise zur UL Zulassung
The device shall be supplied from an isolating transformer having a secondary overcur‐
rent protective device that complies with UL 248 to be installed in the field rated either:
a) max 5 amps for voltages 0 ~ 20 V (0 ~ 28.3 V peak), or
b) 100 / Vp for voltages of 20 ~ 30 V (28.3 ~ 42.4 V peak).
Alternatively, they can be supplied from a Class 2 power supply.
UL Environmental Rating: Enclosure type 1
14 Bestimmungsgemäße Verwendung
Die WLA26 ist eine optoelektronische Reflexions-Lichtschranke (im Folgenden Sensor
genannt) und wird zum optischen, berührungslosen Erfassen von Sachen, Tieren und
Personen eingesetzt. Zur Funktion wird ein Reflektor benötigt. Bei jeder anderen
Verwendung und bei Veränderungen am Produkt verfällt jeglicher Gewährleistungsan‐
spruch gegenüber der SICK AG.
15 Bedien- und Anzeigeelemente
WLA26x-xxxxxx00 WLA26x-xxxxxx01 WLA26x-xxxxxx02
1
2
3
1
23
5
1
23
4
ZU IHRER SICHERHEIT 13
8020357.19RH / 15.01.2021 | SICK
Subject to change without notice 19