SICK WL280-2R4331 Retro-Reflective Sensor with Relay Output
Object Detection Across the Conveyor
The SICK WL280-2R4331 detects objects that interrupt the light path between the sensor and a reflector. A visible red LED assists alignment. Its electrically isolated relay output connects to compatible machine control circuits.
Technical Specifications
| Parameter |
Specification |
| Model |
WL280-2R4331 |
| Part Number |
6044760 |
| Series |
W280-2 |
| Detection Principle |
Photoelectric retro-reflective |
| Sensing Range with P250 |
0.01–11 m |
| Maximum Range with PL80A |
0.01–15 m |
| Supply Voltage |
24–240 VAC or VDC, ±10% |
| Output |
Relay with change-over contacts |
| Switching Mode |
Light-on |
| Contact Rating |
3 A at 240 VAC; 3 A at 30 VDC |
| Response Time |
≤15 ms |
| Switching Frequency |
33 Hz |
| Connection |
Cable gland |
| Protection Rating |
IP66 / IP67 |
| Operating Temperature |
−25 to +55°C |
| Dimensions (W × H × D) |
23.5 × 74.5 × 63 mm |
Adjustment and Installation
Sensitivity is adjusted with a potentiometer. Choose the reflector according to the required detection distance. Align the optics, then test detection with representative products at normal conveyor speed.
Application Areas
Typical applications include carton detection, conveyor occupancy monitoring and package counting. The sensor suits packaging machinery, material handling systems and automated assembly lines.
FAQ
Q1: Does this sensor require a reflector?
A: Yes. It operates with a separate reflector.
Q2: Is 15 m available with the P250 reflector?
A: No. P250 provides an 11 m sensing range and a 12 m maximum range.
Q3: Is the output PNP or NPN?
A: Neither. It has an electrically isolated relay output.
Q4: Can it operate on AC power?
A: Yes. It accepts 24–240 VAC or VDC, ±10%.
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