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Siemens SIRIUS 3SK1111-2AW20 Basic Safety Relay Unit

Siemens SIRIUS 3SK1111-2AW20 basic safety relay with 3 NO + 1 NC contacts.

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ManufacturerSiemens

Part number3SK1111-2AW20

Series SIRIUS 3SK11

Type Basic Safety Relay

Enabling Circuits 3 NO

Signaling Circuit 1 NC

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3 NO Enabling Contacts 1 NC Signaling Contact Wide Voltage Range (110-240V AC/DC) Spring-type Terminals Basic Safety Unit SIRIUS Series

Product description

The Siemens SIRIUS 3SK1111-2AW20 is a compact safety relay designed for basic safety functions in industrial machinery. This standard series unit features three normally open (NO) enabling circuits and one normally closed (NC) signaling circuit, providing essential safety monitoring capabilities. It operates with a versatile supply voltage range of 110-240V AC/DC at 50/60 Hz and utilizes convenient spring-type (push-in) terminals for quick and secure wiring.

This safety relay is crucial for applications requiring adherence to safety standards, such as emergency stop functions, light curtain monitoring, and two-hand control circuits. It is widely used in machine building, automation systems, and manufacturing environments where personnel safety is paramount.

Stanlo Automation, a veteran-owned distributor, offers the Siemens 3SK1111-2AW20. Ensure your safety circuits are compliant and reliable by sourcing from our inventory of surplus industrial automation parts.

Technical specifications

Series	SIRIUS 3SK11
Type	Basic Safety Relay
Enabling Circuits	3 NO
Signaling Circuit	1 NC
Supply Voltage	110 - 240 V AC/DC
Frequency	50/60 Hz
Terminals	Spring-type (push-in)

Common applications

Emergency Stop Circuits

Safety Gate Monitoring

Light Curtain Integration

Two-Hand Control

Machine Safety

Also known as

Siemens Safety Relay 3SK11 SIRIUS Basic Safety Unit 3SK11 Safety Module

Replaces / compatible with

Compatible with standard safety circuit components and accessories within the SIRIUS 3SK11 series.

Technical note

Expert tip

For safety-critical applications, ensure the relay is correctly integrated into a complete safety system and regularly tested according to relevant standards (e.g., ISO 13849).

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Frequently asked questions

What type of contacts does the Siemens 3SK1111-2AW20 safety relay have?

The Siemens SIRIUS 3SK1111-2AW20 safety relay is equipped with three normally open (NO) contacts for enabling circuits and one normally closed (NC) contact for signaling purposes. These contacts are essential for implementing various safety functions.