Wenglor P1PE102 Through Beam Sensor

The through-beam sensor works with red light as well as a transmitter and a receiver.

The through-beam sensor works with red light as well as a transmitter and a receiver. Thanks to their high light intensity, the sensor provides a high degree of operational reliability even with interferences like steam, fog or dust. The transmitter can be deactivated using test input in order to test the functionality of the through-beam sensor. The IO-Link interface can be used to configure the sensor (PNP/NPN, NC/NO, switching distance), as well as for reading out switching statuses and signal values.


  • Condition monitoring
  • High light intensity with large switching reserve
  • IO-Link 1.1
  • Test input for high operational reliability


Presence Check of Pallets in the Refrigerated High-Bay Warehouse with Through-Beam Sensors

In refrigerated logistics centers, the presence of pallets before and after each transfer position must be known in order to secure material flow between the conveyor line and the high-bay warehouse. Through-beam sensors that function according to the transmitter-receiver principle are attached to the conveyor line for this purpose. While solutions with reflectors do not offer process reliability due to contamination, the through-beam sensors, which can be configured via IO-Link, switch reliably. They do not require a reflector and have a higher power reserve thanks to the through-beam principle – even at temperatures down to –40 °C.

Overhang Monitoring in Pallet Warehouses Using Through-Beam Sensors

In automated pallet warehouses, pallets are transported and placed on several rack levels by forklift trucks. The lanes must be clear at all times, otherwise there is a risk of collisions. Through-beam sensors are installed at the outer ends of the high-bay racks on all levels to detect protruding pallets immediately. Even in the event of interference factors such as dust, dirt or ambient light, the light barriers with red light reliably switch over long distances.

Through-Beam Sensors

Through-beam sensors detect and count small parts, detect the edges of objects and monitor passages in systems. The emitter and receiver are housed in separate housings according to the through-beam mode. The sensor switches as soon as an object interrupts the laser light, red light or infrared light.


Optical Data

Range 20,000 mm
Smallest Recognizable Part see Table 1
Switching Hysteresis 10 %
Light Source Red Light
Service Life (T = +25 °C) 100,000 h
Max. Ambient Light 10,000 Lux

Electrical Data

Sensor Type Receiver
Supply Voltage 10 … 30 V DC
Supply Voltage with IO-Link 18 … 30 V DC
Current Consumption (Ub = 24 V) < 25 mA
Switching Frequency 1,000 Hz
Switching Frequency (interference-free mode) 500 Hz
Response Time 0.5 ms
Response time (interference-free mode) 1 ms
Temperature Drift < 10 %
Temperature Range -40 … 60 °C
Switching Output Voltage Drop < 2 V
Switching Output/Switching Current 100 mA
Residual Current Switching Output < 50 µA
Short Circuit and Overload Protection yes
Reverse Polarity Protection yes
Interface IO-Link V1.1
Protection Class III

Mechanical Data

Setting Method Potentiometer
Housing Material Plastic
Degree of Protection IP67/IP68
Connection M12 × 1; 4-pin
Optic Cover PMMA

Safety-relevant Data

MTTFd (EN ISO 13849-1) 1,599.77 a


PNP NO/NC antivalent yes
IO-Link yes

Adjustable parameters

Output Push-pull
Circuit Inactive
Error output
Other parameters Off-delay
Mode of operation
Switching point

Table 1

Distance transmitter/receiver 4 m 10 m 20 m
Smallest Recognizable Part 6 mm 2 mm 2,5 mm


Datasheet : Wenglor P1PE102 Through Beam Sensor

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