SICK WLD26 User manual

OPERATING INSTRUCTIONS
WLD26

OPERATING INSTRUCTIONS
WLD26
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Described product
WLD26
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 modifica‐
tion, abridgment or translation of this document is prohibited without the express writ‐
ten 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
28020356.14CS | 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............................................................................................. 4
5 Electrical installation........................................................................ 5
6 Additional functions.......................................................................... 6
7 Commissioning.................................................................................. 7
8 Troubleshooting................................................................................. 9
9 Disassembly and disposal............................................................... 10
10 Maintenance...................................................................................... 10
11 Technical data.................................................................................... 10
11.1 Dimensional drawings.............................................................................. 11
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.
■
When commissioning, protect the device from moisture and contamination.
■These operating instructions contain information required during the life cycle of
the sensor.
1.2 Notes on UL approval
The device must be supplied by a Class 2 source of supply.
UL Environmental Rating: Enclosure type 1
2 Intended use
The WLD26 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 this product 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
1
2
1LED indicator yellow: status of received light beam
2LED indicator green: supply voltage active
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.
1 SAFETY INFORMATION
48020356.14CS | SICK
Subject to change without notice

5 Electrical installation
The sensors must be connected in a voltage-free state (UV = 0 V). The following informa‐
tion must be observed, depending on the connection type:
– Male connector connection: Note pin assignment
– Cable: wire color
Only apply voltage/switch on the voltage supply (UV > 0 V) once all electrical connec‐
tions have been established.
Explanations on connection diagram (table 1 - table 5)
Alarm = alarm output (table 4)
Health = alarm output (table 4)
Q / Q = switching outputs
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
5
4 3
0.14 mm2
AWG26
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
WLD26
x-
xxXXXxxxZZZ
xx111 xx112 xx113 xx114 xx115 xx116 xx421 xx422 xx721 xx722
BN + (L+)
WH QQAlarm Health Alarm Health Q QQQ
BU - (M)
BK QQQQQQQQQQ
GR - - - - - - Test →
L+
Test →
L+
Test →
M
Test →
M
ELECTRICAL INSTALLATION 5
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Table 3: Push / pull
Q
Push-pull
(≤ 100 mA)
+ (L+)
Q
‒ (M)
+ (L+)
Q
‒ (M)
Q
Push-pull
(≤ 100 mA)
+ (L+)
Q
‒ (M)
+ (L+)
Q
‒ (M)
6 Additional functions
Alarm
Alarm output: The sensor (WLD26) features a pre-failure notification output (“Alarm” in
connection diagram [table 4]), 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 (WLD26) features a pre-failure notification output (“Health”
in connection diagram [table 4]), 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 damaged. In
the good state: HIGH (1), if excessively contaminated or in the event of cable interrup‐
tion LOW (0). The yellow LED indicator flashes in this case.
6 ADDITIONAL FUNCTIONS
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Subject to change without notice

Table 4: 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 WLD26 sensors feature a test input (“TI” or “Test” on the connection
diagram [see table 2 and table 5]), 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 and table 5]). The send LED is shut
down or the detection of an object is simulated. Refer to table 5 to check the function.
If the switching output fails to behave in accordance with table 5, check the application
conditions. See section Fault diagnosis.
Table 5: Test
Test → M Test → L+
+ (L+)
Test
– (M)
+ (L+)
Test
– (M)
+ (L+)
Test
– (M)
+ (L+)
Test
– (M)
7 Commissioning
1Alignment
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.
ADDITIONAL FUNCTIONS 6
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Figure 1: Alignment
2Sensing range
Adjust the distance between the sensor and the reflector according to the corresponding
diagram [see figure 2] (x = sensing range, y = operating reserve).
0
100
10
1
7
6
1
3
4
25
WLD26P-xxxxx1xx
4
(13.12)
8
(26.25)
12
(39.37)
16
(52.49)
20
(65.62)
Operating reserve
Distance in m (feet)
Sensing range
Figure 2: Characteristic line 1
1Reflector PL22
2Reflector P250
3Reflector PL20A
4Reflector PL30A
5Reflector PL40A
6Reflector C110
7Reflector PL80A
0
Sensing range
Distance in m (feet)
0.25 5 7
0.25 11 15
0.25 9 12
0.25 5 7
0.25 11 15
0.25 14 18
0.25 14 18
1
2
3
4
5
6
7
Sensing range max.
4
(13.12)
8
(26.25)
12
(39.37)
16
(52.49)
20
(65.62)
Figure 3: Bar graph 1
7 COMMISSIONING
88020356.14CS | SICK
Subject to change without notice

0 4
(13.12)
8
(26.25)
12
(39.37)
16
(52.49)
20
(65.62)
100
10
1
Operating reserve
Distance in m (feet)
3
4
12
Sensing range
WLD26P-xxxxx1xx
Figure 4: Characteristic line 2
1Reflector PL20 CHEM
2Reflector P250 CHEM
3Reflector P250H
4Reflector PL40 Antifog
0
Sensing range
Distance in m (feet)
0.25 7 10
0.25 10 14
0.25 4 6
1
2
3
4
Sensing range max.
4
(13.12)
8
(26.25)
12
(39.37)
16
(52.49)
20
(65.62)
0.25 10 12
Figure 5: Bar graph 2
0 2
(6.56)
6
(19.69)
10
(32.81)
100
10
1
Operating reserve
Distance in m (feet)
Sensing range
WLD26P-xxxxx1xx
4
(13.12)
8
(26.25)
Figure 6: Characteristic line 3
1REF-IRF (50x70 mm)
0
Sensing range
Distance in m (feet)
0.3 3 5
1
Sensing range max.
2
(6.56)
4
(13.12)
6
(19.69)
8
(26.25)
10
(32.81)
Figure 7: Bar graph 3
8 Troubleshooting
The Troubleshooting table indicates measures to be taken if the sensor stops working.
LED indicator/fault pattern Cause Measures
Switching outputs do not
behave in accordance with
table 3 - table 4
Short-circuit Check electrical connections
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).
TROUBLESHOOTING 8
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Subject to change without notice 9