Description
The Siemens SIRIUS 3SK1121-1CB42 is a safety relay designed for implementing safety functions in industrial automation systems according to international safety standards. This compact safety relay provides reliable monitoring and control of safety circuits, particularly for emergency stop applications. Featuring 2 normally closed (NC) safety contacts and 1 normally open (NO) auxiliary contact, it ensures safe shutdown of machinery in emergency situations. The relay meets SIL 3, PL e, and Category 4 safety requirements according to IEC 62061 and ISO 13849-1 standards. With its compact DIN rail mounting design and 24V DC operating voltage, it is ideal for integrating safety functions into machine control panels and industrial automation systems.
Key Features
- Safety Relay for emergency stop applications
- Safety standard compliance: SIL 3, PL e, Category 4
- Safety contacts: 2 NC (safety outputs)
- Auxiliary contact: 1 NO (monitoring)
- Operating voltage: 24V DC
- Manual reset function
- LED status indicators
- Cross-circuit detection
- Compact DIN rail mounting
- Screw terminal connections
- Operating temperature: -25°C to +55°C
- Country of origin: Germany
Technical Specifications
- Safety Standards:
- IEC 62061: SIL 3
- ISO 13849-1: PL e, Category 4
- Operating Voltage: 24V DC (20.4-28.8V)
- Contact Configuration:
- Safety outputs: 2 NC (normally closed)
- Auxiliary output: 1 NO (normally open)
- Contact Rating:
- Safety contacts: 6A at 24V DC, 250V AC
- Auxiliary contact: 6A at 24V DC, 250V AC
- Switching Capacity:
- AC-15: 6A at 230V AC
- DC-13: 6A at 24V DC
- Response Time: ≤ 20 ms
- Reset Type: Manual (pushbutton)
- LED Indicators:
- Power (green)
- Output status (yellow)
- Fault (red)
- Connection Type: Screw terminals
- Conductor Cross-section: 0.5-2.5 mm² (solid/stranded)
- Dimensions: 22.5mm × 99mm × 114mm (W × H × D)
- Weight: approx. 0.18 kg
- Mounting: DIN rail EN 60715 (35mm)
- Protection Degree: IP20
- Certifications: CE, UL, CSA
Warranty & After-Sales
- Factory new units: 12 months warranty
- Refurbished units: 3-6 months warranty
- Technical support for safety system integration
- Safety circuit design assistance
- Compliance verification with safety standards
- Commissioning and validation support available
Delivery Time
- Standard delivery: 3-5 working days
- Express shipping available upon request
Why Choose Our Store
- Genuine Siemens SIRIUS safety components
- Global supply network with competitive pricing
- Expertise in safety system design and implementation
- Comprehensive technical documentation
- Responsive customer service and support
Applications
- Emergency stop circuits
- Safety door monitoring
- Two-hand control systems
- Light curtain monitoring
- Safety mat monitoring
- Machine safety interlocking
- Press and stamping machine safety
- Robot cell safety systems
- Conveyor safety systems
- Manufacturing equipment safety
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