3SK1121-1CB44
The Siemens SIRIUS 3SK1121-1CB44 is a relay output type safety relay that provides two sets of instantaneous and two sets of delayed (5~300 seconds) normally open safety contacts, screw terminal wiring, rated voltage 24VDC, and meets PL e, Cat.4 safety class. It is suitable for safety circuits that require ultra-long delay shutdown.
Product Positioning
The 3SK1121-1CB44 is a relay-type safety relay of the SIRIUS 3SK1 series, with a built-in adjustable delay of 5 to 300 seconds, suitable for safety circuits that require long machine idle time and long delay stop confirmation.
Core Product Advantages and Features
Relay mechanical contact output
It provides safety output using mechanical relay contacts and is suitable for general industrial safety interlock circuits.
Adjustable delay from 5 to 300 seconds
Offering an exceptionally long latency range rarely seen in the industry, suitable for machine applications with long idle times.
Screw terminal wiring
Standard screw terminal wiring method, compatible with existing wiring installation practices.
High security level certification
Compliant with ISO 13849-1 PL e, Cat.4 and IEC 62061/61508 SIL3 level
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3SK1121-2AB40
The Siemens SIRIUS 3SK1121-2AB40 is a relay output type safety relay, providing 3 sets of normally open safety contacts and 1 set of normally closed signal contacts. It does not have a delay function, has spring-loaded (push-in) terminals, a rated voltage of 24VDC, and meets PL e, Cat.4 safety class. It is suitable for general safety interlock circuits.
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3SK1121-1CB42
The Siemens SIRIUS 3SK1121-1CB42 is a relay output type safety relay that provides two sets of instantaneous and two sets of delayed (0.5~30 seconds) normally open safety contacts, screw terminal wiring, rated voltage 24VDC, and meets PL e, Cat.4 safety class. It is suitable for safety circuits that require long delay shutdown.
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3SK1121-1CB41
The Siemens SIRIUS 3SK1121-1CB41 is a relay output type safety relay that provides two sets of instantaneous and two sets of delayed (0.05~3 seconds) normally open safety contacts, screw terminal wiring, rated voltage 24VDC, and meets PL e, Cat.4 safety class. It is suitable for safety circuits that require short-delay shutdown.