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Siemens 3SK1111-1AB30 SIRIUS Basic Safety Relay

Siemens 3SK1111-1AB30: SIRIUS basic safety relay, 3 NO + 1 NC contacts, screw terminals.

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ManufacturerSiemens

Part number3SK1111-1AB30

Series SIRIUS

Type Basic Unit

Enabling Circuits 3 NO

Signaling Circuit 1 NC

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3 enabling circuits (NO) 1 signaling circuit (NC) 24 V AC/DC operation Screw terminals Basic safety function SIRIUS series

Product description

The Siemens 3SK1111-1AB30 is a fundamental component within the SIRIUS safety relay family, designed for basic safety functions in industrial machinery. This basic unit features three normally open (NO) instantaneous contacts for enabling circuits and one normally closed (NC) contact for signaling or feedback. It operates with a universal supply voltage of 24 V AC/DC and utilizes convenient screw terminals for secure electrical connections.

This safety relay is crucial for applications requiring immediate shutdown of hazardous machine functions upon detection of a safety signal, such as emergency stops or safety gate monitoring. Its standard series design ensures straightforward integration into control systems across various industries, including manufacturing, automotive, and material handling.

Stanlo Automation, your reliable veteran-owned source for surplus industrial automation parts, offers the Siemens 3SK1111-1AB30. We provide access to essential safety components at competitive prices, ensuring your facilities meet safety standards without compromising your budget. Choose Stanlo Automation for dependable safety solutions.

Technical specifications

Series	SIRIUS
Type	Basic Unit
Enabling Circuits	3 NO
Signaling Circuit	1 NC
Supply Voltage	24 V AC/DC
Terminals	Screw

Common applications

Emergency stop circuits

Safety gate monitoring

Light curtain integration

Two-hand control

Machine safety systems

Compatible systems

SIRIUS control systems Standard PLC inputs E-stop buttons Safety gate switches

Also known as

Siemens SIRIUS Safety Relay 3SK11 Basic Safety Module Siemens 24V Safety Relay

Replaces / compatible with

Direct replacement for previous Siemens safety relays with 3 NO + 1 NC configurations and 24V AC/DC voltage, compatible with standard safety input devices.

Technical note

Expert tip

Ensure proper wiring of the safety input devices to the enabling circuits for correct safety function; the NC feedback contact should be wired in series with the control system's start permissive logic.

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Frequently asked questions

What is the difference between enabling and signaling circuits on the 3SK1111-1AB30?

The enabling circuits (3 NO contacts) are used to allow a machine to operate, typically connected to safety devices like emergency stops or light curtains. The signaling circuit (1 NC contact) is used to provide feedback to the control system, indicating the status of the safety relay, such as whether it is in a safe state.