Overview
The Sick WTR 2-N551S06P03 is a ZoneControl photoelectric proximity sensor engineered for robust object detection in manufacturing, packaging, and material-handling applications. This background-suppression model uses infrared LED technology to distinguish objects from backgrounds over a configurable 300–900 mm sensing range, reducing false triggers common in high-contrast environments. The sensor delivers solid-state switching reliability with PNP output, making integration straightforward in most industrial control systems.
Key Features
- Background Suppression: Infrared LED with potentiometer-adjustable sensing window eliminates reflective false triggers
- Wide Sensing Range: 300–900 mm configurability via onboard potentiometer
- PNP Switching Output: Direct logic compatibility with PLC and drive inputs
- M12 Connector: Standard 4-pin industrial connector for plug-and-play integration
- Compact Form Factor: Plastic ABS housing, 18 × 99.5 × 46 mm body for space-constrained mounting
- Robust Operating Range: –40 °C to +60 °C ambient temperature rating
Technical Specifications
- Manufacturer: Sick (Germany)
- Model: WTR 2-N551S06P03
- Part Number (Internal): 1045080
- Supply Voltage: 10–30 V DC
- Current Consumption: ~25 mA nominal
- Output Type: PNP switching, ≤ 100 mA max
- Sensing Principle: Background suppression, infrared LED
- Sensing Range: 300–900 mm (adjustable)
- Light Spot Diameter (@ 900 mm): Ø 40 mm
- Switching Frequency: 250 Hz
- Connection: Male M12, 4-pin
- Housing Material: Plastic, ABS
- Enclosure Rating: IP54
- Operating Temperature: –40 °C to +60 °C
- Storage Temperature: –40 °C to +75 °C
- Dimensions (W × H × D): 18 × 99.5 × 46 mm
- Weight: ~40 g
- LED Service Life: 100,000 h @ +25 °C
Typical Applications
- Conveyor and assembly line object detection
- Packaging equipment part positioning and presence verification
- Automated material handling and sorting systems
- High-contrast or reflective surface detection without false triggering
- Industrial process automation requiring reliable edge detection
Compatibility & Replacements
Compatible With
- Allen-Bradley CompactLogix and ControlLogix PLC analog and digital I/O modules
- Siemens S7-1200 and S7-1500 series controllers (via digital input cards)
- Mitsubishi FX and iQ-F series PLCs with DC input modules
- Omron CP and NX series controllers
- Any 10–30 V DC-powered industrial control system with PNP input capability
Replaces / Drop-In Replacement For
- Sick WTR 2-N551S06 (base model without P03 connector variant)
- Other ZoneControl WTR2 series sensors with identical M12 pinout
Works With
- Sick ZoneControl software configuration tools
- Standard industrial PLC programming environments (Studio 5000, TIA Portal, GX Works)
- 4–20 mA transmitter modules for analog integration (via external converter)
- EtherCAT, PROFIBUS, and PROFINET gateways (with appropriate fieldbus coupler)
