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L21S-21KA1A | Safety light-beam sensors
The SICK L21S-21KA1A is a robust safety light-beam sensor featuring a visible red LED light source, designed for industrial safety applications with a scanning range of 16 meters and IP67 protection.
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Product Name/Title: L21S-21KA1A | Safety light-beam sensors
Brand: SICK
SKU: 6034872
Alternatively Known As: Safety light beam sensor, Safety light curtain sensor, Industrial safety sensor, Light beam safety sensor
Technical Specifications
- Light source: LED
- Type of light: Visible red light (660 nm wavelength)
- Scanning range: 16 m
- Number of beams: 1
- Optical axis: Axial
- Response time: 0.2 ms + test device response time
- Safety type: Type 2 (IEC 61496-1)
- Safety integrity level: SIL 1 (IEC 61508)
- Category: Category 2 (EN ISO 13849)
- Test rate (external test): 100/s (EN ISO 13849)
- Maximum demand rate: 60 min⁻¹ (EN ISO 13849)
- Performance level: PL c (EN ISO 13849)
- PFHD: 1.0 x 10⁻⁶ (EN ISO 13849)
- Mission time: 20 years (EN ISO 13849)
- Connection type: Male connector M12, 4-pin, straight
- Protection class: III (IEC 61140)
- Supply voltage: 24 V DC (19.2 V DC to 28.8 V DC)
- Power consumption: ≤ 20 mA
- Housing material: Plastic PBT
- Front screen material: Glass
- Enclosure rating: IP67 (EN 60529)
- Operating temperature: -40°C to +55°C
- Storage temperature: -40°C to +75°C
- Air humidity: 15% to 95%, non-condensing
- Vibration resistance: 5 g, 10 Hz to 55 Hz (IEC 60068-2-6)
- Shock resistance: 10 g, 16 ms (IEC 60068-2-27)
- Aperture angle/receiving angle: ±5° / ±5°
- Dimensions (H x L x W): 18mm x 98mm x 18mm
- Weight: 0.1 kg
Key Features
- LED light source with visible red light
- Single beam with axial optical axis
- Scanning range up to 16 meters
- Fast response time of 0.2 ms plus test device response time
- High protection class IP67 for harsh environments
- Robust cylindrical design with plastic PBT housing and glass front screen
- Wide ambient operating temperature range from -40°C to +55°C
- Vibration and shock resistant
Professional Installation Requirements
- Installation should be performed by qualified personnel familiar with safety sensor systems and compliant with relevant safety standards.
Applications
- Industrial safety monitoring
- Machine guarding
- Access control in automated systems
- Presence detection in manufacturing environments
Standards & Compliance
- AS/NZS 4801 – Occupational Health & Safety Management Systems
Environmental Benefits
- Low power consumption of ≤ 20 mA reduces energy usage
- Durable design minimizes waste and replacement frequency
Warranty Information
Standard manufacturer warranty applies; please refer to SICK's official warranty policy.
Available Now
The SICK L21S-21KA1A Safety Light-Beam Sensor is available for immediate purchase, ideal for industrial safety and machine guarding applications.
