Description
The Siemens SIRIUS 3SK1121-1AB40 is a configurable safety relay designed for machine guarding and safety applications. This single-channel safety relay operates at 24V DC and features 4 safety contacts, providing reliable protection in industrial automation systems. With its advanced design that won the prestigious 2013 iF Product Design Award, this safety relay offers exceptional simplicity, flexibility, and cost-effectiveness. The module supports automatic monitoring reset and is certified to SIL 3 according to IEC 62061 and PL e according to EN ISO 13849-1, ensuring the highest level of safety integrity for critical applications.
Key Features
- Configurable Safety Relay with single channel operation
- 24V DC power supply
- 4 safety contacts
- Automatic monitoring reset
- SIL 3 certification (IEC 62061)
- PL e performance level (EN ISO 13849-1)
- 2013 iF Product Design Award winner
- Screw terminal connection
- RoHS compliant, lead-free
- Country of origin: Germany
Technical Specifications
- Power Supply: 24V DC
- Safety Contacts: 4 contacts
- Power Loss: 2 W
- Insulation Voltage: 300 V
- Protection Degree: IP20
- Operating Temperature: -25°C to +60°C
- Storage Temperature: -40°C to +80°C
- Relative Humidity: 10-95%
- Shock Resistance: 10g / 11 ms
- Vibration Resistance: 5-500 Hz, 0.75 mm
- Switching Frequency: 360 operations/hour
- Mechanical Life: 10,000,000 cycles (typical)
- Thermal Current: 5 A
- Weight: approx. 0.224 kg
- Pollution Degree: 3
- Overvoltage Category: 3
- Surge Voltage Resistance: 4,000 V
- Standards: IEC 60947-5-1, IEC 61000, RoHS compliant
Warranty & After-Sales
- Factory new units: 12 months warranty
- Refurbished units: 3-6 months warranty
- Technical support for configuration and integration
- Wiring and installation assistance
- Compatibility verification with existing systems
- Commissioning and diagnostics support available
Delivery Time
- Standard delivery: 3-5 working days
- Express shipping available upon request
Why Choose Our Store
- Genuine Siemens SIRIUS components
- Global supply network with competitive pricing
- Expertise in safety relay systems
- Comprehensive technical documentation
- Responsive customer service and support
Applications
- Machine guarding systems
- Emergency stop circuits
- Safety door monitoring
- Two-hand control stations
- Safety light curtains
- Industrial automation safety
- Process control safety systems
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