3SK1122-1CB41

The Siemens SIRIUS 3SK1122-1CB41 is an advanced electronic safety relay with a solid-state output design. It provides two sets of instantaneous and two sets of delayed (0.05~3 seconds) normally open safety outputs, with a rated voltage of 24VDC, screw terminal wiring, and meets PLE and Cat.4 safety levels. It is suitable for monitoring circuits such as emergency stop and safety door.

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Product photo of Siemens SIRIUS 3SK1122-1CB41 electronic safety relay

Product Positioning

The 3SK1122-1CB41 is an advanced electronic (solid-state output) safety relay in the SIRIUS 3SK1 series. It has a built-in adjustable delay function of 0.05 to 3 seconds and is suitable for safety circuit applications that require short-delay shutdown.

Core Product Advantages and Features

Solid-state electronic output

Semiconductor (electronic) safety outputs replace mechanical relay contacts, resulting in fast switching response and no concerns about contact wear.

Adjustable delay from 0.05 to 3 seconds

The delayed enable output can be set with a short delay according to process requirements, meeting applications such as downtime buffering.

Dual-loop instantaneous/delayed output

Provides two sets of instantaneous normally open and two sets of delayed normally open safety outputs to meet the requirements of segmented shutdown control.

High security level certification

Compliant with ISO 13849-1 PL e, Cat.4 and IEC 62061/61508 SIL3 level

project	Specification
Security level	PL e (ISO 13849-1) / Category 4 / SIL 3 (IEC 62061, IEC 61508)
Rated voltage	Us = 24 V DC
Delay range	0.05 ~ 3 seconds (adjustable)
Safe output	Electronic (solid-state) 2 instantaneous normally open + 2 delayed normally open
Wiring method	Screw terminals
Protection level	IP20

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