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Siemens 3SK1111-1AW20 SIRIUS Safety Relay (110-240V AC/DC)

Siemens 3SK1111-1AW20 SIRIUS safety relay, Standard series basic unit.

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ManufacturerSiemens

Part number3SK1111-1AW20

Part Number 3SK1111-1AW20

Manufacturer Siemens

Product Type Safety Relay

Series SIRIUS Standard

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SIRIUS Standard series 3 enabling contacts (NO) 1 signaling contact (NC) Wide voltage range 110-240V AC/DC Screw terminals Basic safety relay functionality

Product description

The Siemens 3SK1111-1AW20 is a SIRIUS safety relay from the Standard series, acting as a basic unit for safety-related applications. It is designed to monitor safety functions and ensure reliable shutdown in hazardous situations.

This safety relay features three Normally Open (NO) contacts for enabling circuits and one Normally Closed (NC) contact for signaling circuits. It operates with a wide voltage supply range of 110 to 240 V AC/DC and uses convenient screw terminals for connection.

Stanlo Automation, a veteran-owned distributor of surplus industrial automation parts, offers the Siemens 3SK1111-1AW20. Secure your safety systems with high-quality, cost-effective components from a reliable supplier.

Technical specifications

Part Number	3SK1111-1AW20
Manufacturer	Siemens
Product Type	Safety Relay
Series	SIRIUS Standard
Unit Type	Basic Unit
Enabling Circuits	3 NO (Normally Open)
Signaling Circuit	1 NC (Normally Closed)
Supply Voltage (Us)	110 - 240 V AC/DC
Frequency	50/60 Hz
Terminal Type	Screw Terminal

Common applications

Emergency stop monitoring

Safety gate monitoring

Light curtain safety

Machine safety

Industrial control panels

Safety interlocks

Compatible systems

Safety devices (E-stops, gate switches) Control systems PLC safety modules

Also known as

Siemens SIRIUS 3SK1111-1AW20 3SK1111-1AW20 Safety Relay Siemens Standard Series Safety Relay

Replaces / compatible with

This safety relay is designed for basic safety monitoring tasks, replacing simpler relay logic for enhanced safety integrity and diagnostic capabilities.

Technical note

Expert tip

Ensure the supply voltage (110-240V AC/DC) is correctly applied to the Us terminals of the 3SK1111-1AW20 for proper operation.

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Frequently asked questions

What type of circuits does the Siemens 3SK1111-1AW20 safety relay monitor?

The Siemens 3SK1111-1AW20 is configured with three Normally Open (NO) contacts for enabling circuits and one Normally Closed (NC) contact for the signaling circuit. This allows it to monitor safety devices like emergency stop buttons and safety gates.