SICK 1057177 WLG4SC-3P2232A00 IO-Link Glass Sensor

Technical Overview

The SICK WLG4SC-3P2232A00 detects transparent targets using polarized coaxial retro-reflective optics, a 650 nm PinPoint LED and a reflector. The specified PL80A sensing range is 0–3 m, with a 0–5 m maximum, and detectable beam attenuation is greater than 8%. Its Base logics Smart Task provides configurable logic, delay and inversion functions. IO-Link V1.1 communicates at COM2 with a 2.3 ms cycle and carries two switching states in 16-bit process data. Pin 2 can serve as an external input, teach-in input, sender-off input or configurable output. A local teach-in button, 10–30 V DC supply and direct M8 four-pin connector support integration in an IP66/IP67 ABS/PMMA enclosure.

Polarized transparent-object sensor with 0–3 m PL80A range, configurable PNP switching, IO-Link V1.1 Base logics and direct M8 four-pin connection.

Key Features

Polarized coaxial/autocollimation retro-reflective detection

0–3 m sensing range; maximum 0–5 m with PL80A reflector

650 nm red PinPoint LED; typical Ø45 mm spot at 1.5 m

Transparent-object detection at >8% beam attenuation with AutoAdapt

IO-Link V1.1, COM2 38.4 kBaud, 2.3 ms cycle and 16-bit process data

Base logics: Direct, AND, OR, WINDOW, hysteresis, delays and inverter

Configurable pin 2 and local teach-in button

PNP light/dark switching, ≤100 mA; direct M8 four-pin connector

Device, quality-of-teach and quality-of-run diagnostics with contamination display

10–30 V DC, 20 mA without load; IP66/IP67 ABS/PMMA housing

Technical Specification Matrix

Parameter	Value
Functional principle	Photoelectric retro-reflective sensing; polarized coaxial/autocollimation optics; reflector required
Sensing range	0–3 m with PL80A reflector
Maximum sensing range	0–5 m with PL80A reflector
Reflector minimum distance	No reflector minimum distance with coaxial/autocollimation optics
Polarization filter	Yes
Light source	Visible red PinPoint LED
Wavelength	650 nm
Light spot size	Typically Ø45 mm at 1.5 m
LED service life	Average 100,000 h at ambient +25 °C
Attenuation along beam	>8%
AutoAdapt	Yes
Digital output	PNP; maximum ≤100 mA; pin-4 output must not be connected to another output
Switching mode	Light/dark switching
Pin 2 configuration	Selectable external input, teach-in, sender-off input, detection output, logic output or contamination-alarm output
Pin assignment	1 BN=L+; 4 BK=QL1/C IO-Link; 2 WH=MF configurable; 3 BU=M
Adjustment	IO-Link and single teach-in button
IO-Link	V1.1; COM2, 38.4 kBaud; cycle 2.3 ms; master port type A; SIO support
IO-Link process data	16 bit; bit 0=QL1, bit 1=QL2; bits 2–15=empty
IO-Link identifiers	VendorID 26; DeviceID 0x8000DC / 8388828
Smart Task	Base logics
Logic functions	Direct, AND, OR, WINDOW, hysteresis
Timer functions	Deactivated, switch-on delay, off delay, ON and OFF delay, impulse/one-shot; inverter available
Diagnostics	Device status, quality of teach, quality of run and contamination display
Power supply	10–30 V DC; short-circuit protected network, maximum 8 A
Current consumption	20 mA without load
Residual ripple	<5 Vpp; remain within supply limits
Protection class	III
Circuit protection	Supply, inputs and output reverse-polarity protection; interference suppression; output overcurrent and short-circuit protection
Housing design	Slim rectangular
Connection	Direct male M8 four-pin connector
Indicators	Green power LED; orange received-light LED
Housing material	ABS plastic
Front screen	PMMA plastic
IP rating	IP66/IP67
Operating temperature	−40 to +60 °C
Storage temperature	−40 to +75 °C
UL file	NRKH.E181493 & NRKH7.E181493
MTTFD	1,222 years
DCavg	0%
Physical Weight (kg)	0.03
Response time	SIO Direct 300–450 µs; SIO Logic 500–600 µs; IO-Link 500–900 µs
Repeatability	SIO Direct 150 µs; SIO Logic 150 µs; IO-Link 400 µs
Switching frequency	SIO Direct 1,000 Hz; SIO Logic 1,000 Hz; IO-Link 900 Hz
Operating modes	SIO Direct: no IO-Link communication and direct/deactivated logic/timing; SIO Logic: local logic/timing without IO-Link communication; IO-Link: full communication with configured logic/timing

Parameter

Value

Functional principle

Photoelectric retro-reflective sensing; polarized coaxial/autocollimation optics; reflector required

Sensing range

0–3 m with PL80A reflector

Maximum sensing range

0–5 m with PL80A reflector

Reflector minimum distance

No reflector minimum distance with coaxial/autocollimation optics

Polarization filter

Yes

Light source

Visible red PinPoint LED

Wavelength

650 nm

Light spot size

Typically Ø45 mm at 1.5 m

LED service life

Average 100,000 h at ambient +25 °C

Attenuation along beam

>8%

AutoAdapt

Yes

Digital output

PNP; maximum ≤100 mA; pin-4 output must not be connected to another output

Switching mode

Light/dark switching

Pin 2 configuration

Selectable external input, teach-in, sender-off input, detection output, logic output or contamination-alarm output

Pin assignment

1 BN=L+; 4 BK=QL1/C IO-Link; 2 WH=MF configurable; 3 BU=M

Adjustment

IO-Link and single teach-in button

IO-Link

V1.1; COM2, 38.4 kBaud; cycle 2.3 ms; master port type A; SIO support

IO-Link process data

16 bit; bit 0=QL1, bit 1=QL2; bits 2–15=empty

IO-Link identifiers

VendorID 26; DeviceID 0x8000DC / 8388828

Smart Task

Base logics

Logic functions

Direct, AND, OR, WINDOW, hysteresis

Timer functions

Deactivated, switch-on delay, off delay, ON and OFF delay, impulse/one-shot; inverter available

Diagnostics

Device status, quality of teach, quality of run and contamination display

Power supply

10–30 V DC; short-circuit protected network, maximum 8 A

Current consumption

20 mA without load

Residual ripple

<5 Vpp; remain within supply limits

Protection class

III

Circuit protection

Supply, inputs and output reverse-polarity protection; interference suppression; output overcurrent and short-circuit protection

Housing design

Slim rectangular

Connection

Direct male M8 four-pin connector

Indicators

Green power LED; orange received-light LED

Housing material

ABS plastic

Front screen

PMMA plastic

IP rating

IP66/IP67

Operating temperature

−40 to +60 °C

Storage temperature

−40 to +75 °C

UL file

NRKH.E181493 & NRKH7.E181493

MTTFD

1,222 years

DCavg

Physical Weight (kg)

0.03

Response time

SIO Direct 300–450 µs; SIO Logic 500–600 µs; IO-Link 500–900 µs

Repeatability

SIO Direct 150 µs; SIO Logic 150 µs; IO-Link 400 µs

Switching frequency

SIO Direct 1,000 Hz; SIO Logic 1,000 Hz; IO-Link 900 Hz

Operating modes

SIO Direct: no IO-Link communication and direct/deactivated logic/timing; SIO Logic: local logic/timing without IO-Link communication; IO-Link: full communication with configured logic/timing

Industrial Applications

1. Counting transparent containers on a packaging conveyor

A packaging conveyor can align the sensor with a PL80A reflector across the container path. The sensor evaluates the reduced returned light as separated transparent containers cross the beam. External counting logic records the switching transitions. Actual wall material, container shape, attenuation, alignment and available gaps are validated within the 0–3 m sensing range.

Problem Solved

Beam-attenuation events provide external counting logic with a reference for separated transparent containers, helping track product flow where a transparent wall may transmit much of the emitted light.

Transparent containers PL80A reflector PNP transitions

2. Recognizing a break in a transparent material web

A material feeder can route a transparent web across the optical path between the sensor and reflector. The sensor distinguishes the attenuated web-present state from the unobstructed reflector return when a break opens the path. External line control evaluates the change against the expected material state, with actual film attenuation, flutter and the selected sensitivity validated during setup.

Problem Solved

A change from the taught material-present return to the clear reflector return identifies a possible web break, allowing external feeder control to respond before subsequent processing runs without material.

Web continuity Beam attenuation External line control

3. Identifying container accumulation at a transfer point

At a conveyor transfer, a transparent container that stays in the optical path can maintain an attenuated reflector return. External control evaluates how long the selected PNP state persists to distinguish a passing container from sustained occupancy. The actual container attenuation is validated above 8%, and the PL80A reflector is positioned within the specified sensing range.

Problem Solved

Sustained beam attenuation provides external conveyor control with an occupied-transfer indication, helping it coordinate upstream release when a container remains at the transfer instead of clearing normally.

Sustained occupancy External timing Container flow