3SK1120-1AB40

The Siemens SIRIUS 3SK1120-1AB40 is an entry-level electronic safety relay in the SIRIUS 3SK1 series. It features a solid-state output design, provides a 0.5A electronically enabled circuit, uses screw terminal wiring, has a rated voltage of 24VDC, meets PL e and Cat.4 safety standards, and is suitable for small, single-safety-circuit applications.

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Siemens SIRIUS 3SK1120-1AB40 Electronic Safety Relay - Entry-level Product Image

Product Positioning

The 3SK1120-1AB40 is the most streamlined electronic safety relay in the SIRIUS 3SK1 series, providing only a single electronically enabled circuit, making it suitable for small safety applications with simple circuit requirements.

Core Product Advantages and Features

Solid-state electronic output

Replacing mechanical contacts with semiconductor electronic circuits offers faster response times and eliminates concerns about contact wear.

Single energy-efficient loop 0.5A

Provides one 0.5A electronic actuator output, suitable for small applications with simple circuit requirements.

Screw terminal wiring

Standard screw terminal wiring method, compatible with existing wiring installation habits.

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
Safe output	Electronic energizing circuit, 0.5 A
Wiring method	Screw terminals
Protection level	IP20

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3SK1121-1AB40

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