SICK WTB4S-3 User manual
OPERATING INSTRUCTION
WTB4S-3 Teach-in focused
Miniature photoelectric sensors
en / de / fr / it / pt / es / zh / ja / ru
8012136.YM43
SICK AG, Erwin-Sick-Strasse 1, D-79183 Waldkirch
Photoelectric proximity sensor
Operating instructions
1 Safety notes
■Read the operating instructions before commissioning.
■Connection, mounting, and setting may only be performed by trained specialists.
■Not a safety component in accordance with the EU Machinery Directive.
■UL: Only for use in applications in accordance with NFPA 79. These devices shall
be protected by a 1 A fuse suitable for 30 V DC. Adapters listed by UL with connec‐
tion cables are available. Enclosure type 1.
■When commissioning, protect the device from moisture and contamination.
■These operating instructions contain information required during the life cycle of
the sensor.
2 Correct use
The WTB4S-3 is an opto-electronic photoelectric proximity sensor (referred to as "sen‐
sor" in the following) for the optical, non-contact detection of objects, animals, and per‐
sons. If the product is used for any other purpose or modified in any way, any warranty
claim against SICK AG shall become void.
Photoelectric proximity sensor with background suppression.
Image: A
3 Commissioning
1 Check the application conditions: Adjust the sensing range and distance to the
object or background and the remission capability of the object according to the
corresponding diagram [H] (x = sensing range, y = transition range between the set
sensing range and suppression of the background as a % of the sensing range
(object remission / background remission). Remission: 6% = black , 18% = grey
, 90% = white (referring to standard white as per DIN 5033).
8012136.YM43 | SICK
Subject to change without notice 1
The minimum distance (= y) for background suppression can be determined from
diagram [H] as follows:
Example: x = 120 mm, y = 7 => 7 % of 120 mm = 8.4 mm. That is, the background
is suppressed at a distance of > 128.4mm from the sensor.
Image: H
2 Mount the sensor using a suitable mounting bracket (see the SICK range of acces‐
sories).
Note the sensor's maximum permissible tightening torque of 0.8 Nm.
Note the preferred direction of the object relative to the sensor [see A].
3 The sensors must be connected in a voltage-free state (VS = 0 V). The information
in the graphics [B] must be observed, depending on the type of connection:
–
Technical data and connection diagrams (figure B) starting on page 57.
– Cable: core color
Only apply voltage/switch on the power supply (VS > 0 V) once all electrical connec‐
tions have been completed. The green LED indicator lights up on the sensor.
Explanations of the connection diagram (Graphic B):
Switching outputs Q and /Q (according to Graphic B):
Teach-in = external teach-in (ET) (see Adjustment)
WTB4S-3Exxxx and WTB4S-3Fxxxx
D: dark-switching, output (Q) switches off when an object is present in the sensing
range.
WTB4S-3P1332 and WTB4S-3Px1xx:
WTB4S-3N1332 and WTB4S-3Nx1xx:
WTB4S-3Pxxx4 and WTB4S-3Nxxx4 (Additional ET: teach-in function per cable. Con‐
nect ET cable (pin 2) > 2 s to Vs (output PNP); connect ET cable (pin 2) > 2 s to M
(output NPN)):
L: light switching, output (Q) switches when an object is present in the sensing
range.
WTB4S-3P1132 and WTB4S-3N1132:
WTB4S-3Px232 and WTB4S-3Nx232:
ANT: complementary outputs Q and Q/
3 COMMISSIONING
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4 Align the sensor with the object. Select the position so that the red emitted light
beam hits the center of the object. You must ensure that the optical opening (front
screen) of the sensor is completely clear [E]. We recommend making the adjust‐
ments using an object with a low remission.
Image: E
5
Image: F
Sensor with teach-in via pushbutton and / or cable:
The sensing range is adjusted by pressing the teach-in button or by activating the
teach function via cable. Do not operate the each-in button using sharp objects. We
recommend placing the switching state in the object, e. g., see graphic F. Once the
sensing range has been adjusted, the object is removed from the path of the
beam, which causes the background to be suppressed and the switching output to
change (see graphic C).
COMMISSIONING 3
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Image: C
Image: G
Teach-in mode
for objects /
Teach-in mode
for objects
Teach-in time /
Teach-in time
Alignment /
Alignment
LED indicator /
LED indicator
Results /
Results
Single teach-in
pushbutton /
Single teach-in
pushbutton
Approx. 0.5 s /
Approx. 0.5 s
Sensor to
object /
Sensor to object
Sensing range is
adjusted accor‐
ding to object /
Sensing range is
adjusted accor‐
ding to object
ET: Connect pin 2
or white wire to
UV for > 2 to < 2
s (PNP). /
ET: Connect pin 2
or white wire to
UV for > 2 to < 2
s (PNP).
> 2 s Sensor to
object /
Sensor to object
Sensing range is
adjusted accor‐
ding to object /
Sensing range is
adjusted accor‐
ding to object
4
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5 Fault diagnosis
Table Fault diagnosis indicates which measures are to be taken if the sensor stops working.
6 Table Fault diagnosis
LED indicator/fault pattern /
LED indicator/fault pattern
Cause /
Cause
Measures /
Measures
Green LED does not light up /
Green LED does not light up
No voltage or voltage below
the limit values /
No voltage or voltage below
the limit values
Check the power supply,
check all electrical connecti‐
ons (cables and plug connecti‐
ons) /
Check the power supply,
check all electrical connecti‐
ons (cables and plug connecti‐
ons)
Green LED does not light up /
Green LED does not light up
Voltage interruptions /
Voltage interruptions
Ensure there is a stable power
supply without interruptions /
Ensure there is a stable power
supply without interruptions
Green LED does not light up /
Green LED does not light up
Sensor is faulty /
Sensor is faulty
If the power supply is OK,
replace the sensor /
If the power supply is OK,
replace the sensor
Yellow LED flashes /
Yellow LED flashes
Sensor is still ready for opera‐
tion, but the operating conditi‐
ons are not ideal /
Sensor is still ready for opera‐
tion, but the operating conditi‐
ons are not ideal
Check the operating conditi‐
ons: Fully align the beam of
light (light spot) with the
object. / Clean the optical sur‐
faces . / Readjust the sensiti‐
vity / Check sensing range
and adjust if necessary; see
graphic F. /
Check the operating conditi‐
ons: Fully align the beam of
light (light spot) with the
object. / Clean the optical sur‐
faces . / Readjust the sensiti‐
vity / Check sensing range
and adjust if necessary; see
graphic F.
Yellow LED lights up, no object
in the path of the beam /
Yellow LED lights up, no object
in the path of the beam
/ Distance between the sen‐
sor and the background is too
short /
/ Distance between the sen‐
sor and the background is too
short
Reduce the sensing range,
see graphic F /
Reduce the sensing range,
see graphic F
Object is in the path of the
beam, yellow LED does not
light up /
Object is in the path of the
beam, yellow LED does not
light up
Distance between the sensor
and the object is too long or
sensing range is set too
short /
Distance between the sensor
and the object is too long or
sensing range is set too short
Increase the sensing range,
see graphic F /
Increase the sensing range,
see graphic F
FAULT DIAGNOSIS 5
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7 Disassembly and disposal
The sensor must be disposed of according to the applicable country-specific regulati‐
ons. Efforts should be made during the disposal process to recycle the constituent
materials (particularly precious metals).
8 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.
7 DISASSEMBLY AND DISPOSAL
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Subject to change without notice
Reflexions-Lichttaster
Betriebsanleitung
9 Sicherheitshinweise
■Vor der Inbetriebnahme die Betriebsanleitung lesen.
■Anschluss, Montage und Einstellung nur durch Fachpersonal.
■Kein Sicherheitsbauteil gemäß EU-Maschinenrichtlinie.
■UL: Nur zur Verwendung in Anwendungen gemäß NFPA 79. Diese Geräte müssen
mit einer für 30V DC geeigneten 1A-Sicherung abgesichert werden. Von UL gelis‐
tete Adapter mit Anschlusskabeln sind verfügbar. Enclosure type 1.
■Gerät bei Inbetriebnahme vor Feuchte und Verunreinigung schützen.
■Diese Betriebsanleitung enthält Informationen, die während des Lebenszyklus des
Sensors notwendig sind.
10 Bestimmungsgemäße Verwendung
Die WTB4S-3 ist ein optoelektronischer Reflexions-Lichttaster (im Folgenden Sensor
genannt) und wird zum optischen, berührungslosen Erfassen von Sachen, Tieren und
Personen eingesetzt. Bei jeder anderen Verwendung und bei Veränderungen am Pro‐
dukt verfällt jeglicher Gewährleistungsanspruch gegenüber der SICK AG.
Reflexionslichttaster mit Hintergrundausblendung.
Abb.: A
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Subject to change without notice 7
11 Inbetriebnahme
1 Einsatzbedingungen prüfen: Schaltabstand und Distanz zum Objekt bzw. Hinter‐
grund sowie Remissionsvermögen des Objektes mit dem zugehörigen Diagramm
[vgl. H] abgleichen (x = Schaltabstand, y = Übergangsbereich zwischen eingestell‐
tem Schaltabstand und Ausblendung des Hintergrundes in % des Schaltabstands
(Remission Objekt / Remission Hintergrund)). Remission: 6 % = schwarz , 18 % =
grau , 90 % = weiß (bezogen auf Standardweiß nach DIN 5033).
Die minimale Distanz (= y) für die Hintergrundausblendung kann aus dem Dia‐
gramm [vgl. H] wie folgt ermittelt werden:
Beispiel: x = 120 mm, y = 7 => 7 % von 120 mm = 8.4 mm. D. h. der Hintergrund
wird ab einer Distanz von > 128.4 mm vom Sensor ausgeblendet.
Abb.: H
2 Den Sensor an einen geeigneten Befestigungswinkel montieren (siehe SICK-Zube‐
hör-Programm).
Maximal zulässiges Anzugsdrehmoment des Sensors von 0.8 Nm beachten.
Vorzugsrichtung des Objektes zum Sensor beachten [vgl. A].
3 Anschluss der Sensoren muss spannungsfrei (VS = 0 V) erfolgen. Je nach
Anschlussart sind die Informationen in den Grafiken [vgl. B] zu beachten:
– Steckeranschluss: Pinbelegung
– Leitung: Adernfarbe
10 BESTIMMUNGSGEMÄSSE VERWENDUNG
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Subject to change without notice
Erst nach Anschluss aller elektrischen Verbindungen die Spannungsversorgung (VS
> 0 V) anlegen bzw. einschalten. Am Sensor leuchtet die grüne Anzeige-LED.
Erläuterungen zum Anschlussschema (Grafik B):
Schaltausgänge Q bzw. /Q (gemäß Grafik B):
Teach = externer Teach (ET) (siehe Einstellung)
WTB4S-3Exxxx und WTB4S-3Fxxxx
D: dunkelschaltend, Ausgang (Q) schaltet aus, wenn sich ein Objekt im Tastbereich
befindet.
WTB4S-3P1332 und WTB4S-3Px1xx:
WTB4S-3N1332 und WTB4S-3Nx1xx:
WTB4S-3Pxxx4 und WTB4S-3Nxxx4 (Zusätzlich ET: Teach-Funktion über Leitung.
Leitung ET (Pin 2) > 2 s auf UV legen (PNP-Ausgang); Leitung ET (Pin 2) > 2 s auf M
legen (NPN-Ausgang)):
L: hellschaltend, Ausgang (Q) schaltet, wenn sich ein Objekt im Tastbereich befin‐
det.
WTB4S-3P1132 und WTB4S-3N1132:
WTB4S-3Px232 und WTB4S-3Nx232:
ANT: Antivalente Ausgänge Q und Q/
4 Sensor auf Objekt ausrichten. Positionierung so wählen, dass der rote Sendelicht‐
strahl in der Mitte des Objekts auftrifft. Es ist darauf zu achten, dass die optische
Öffnung (Frontscheibe) des Sensors vollständig frei ist [vgl. E]. Wir empfehlen, die
Einstellung mit einem Objekt von niedriger Remission vorzunehmen.
Abb.: E
INBETRIEBNAHME 11
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Subject to change without notice 9
Technische Daten und Anschlussschemata (Grafik B) ab Seite 57.
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