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Siemens 3SK1121-2CB41 SIRIUS Safety Relay - Basic Unit Advanced

Siemens 3SK1121-2CB41 SIRIUS Safety Relay, Advanced Series.

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ManufacturerSiemens

Part number3SK1121-2CB41

Series SIRIUS Advanced

Type Basic Unit

Time Delay 0.05-3 s

Enabling Circuits 2 NO instantaneous

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Adjustable time delay 0.05-3s 2 NO instantaneous outputs 2 NO delayed outputs 24V DC operation Spring-type (push-in) terminals SIRIUS Advanced series

Product description

The Siemens 3SK1121-2CB41 is a SIRIUS safety relay, part of the Advanced series basic unit. It features a time delay adjustable from 0.05 to 3 seconds and offers 2 instantaneous normally open (NO) enabling circuits and 2 delayed normally open (NO) relay outputs. This unit operates at a supply voltage of 24V DC and utilizes spring-type (push-in) terminals for quick and secure connections.

This safety relay is designed for applications requiring enhanced safety monitoring, such as emergency stop circuits, light curtains, and safety gates in various industrial settings. Industries that benefit from its reliable performance include manufacturing, automotive, packaging, and material handling.

Stanlo Automation, a veteran-owned business, offers a reliable source for the Siemens 3SK1121-2CB41. We understand the critical nature of industrial automation components and are committed to providing quality surplus parts with prompt service, ensuring your operations continue with minimal downtime.

Technical specifications

Series	SIRIUS Advanced
Type	Basic Unit
Time Delay	0.05-3 s
Enabling Circuits	2 NO instantaneous
Relay Outputs	2 NO delayed
Supply Voltage	24 V DC
Terminal Type	Spring-type (push-in)

Common applications

Emergency stop circuits

Safety gate monitoring

Light curtain integration

Machine safety control

Industrial automation

Risk reduction

Compatible systems

Compatible with various safety sensors and control systems requiring 24V DC inputs.

Also known as

Siemens 3SK1121-2CB41 safety relay SIRIUS safety module 3SK1121 basic unit

Replaces / compatible with

Replaces older safety relay models requiring similar functionality. Compatible with Siemens SIRIUS system accessories.

Technical note

Expert tip

Ensure proper wiring of enabling circuits and feedback loops for full safety integrity. The push-in terminals offer a tool-free connection, but verify secure contact after installation.

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Frequently asked questions

What is the time delay range for the Siemens 3SK1121-2CB41 safety relay?

The Siemens 3SK1121-2CB41 safety relay features an adjustable time delay ranging from 0.05 to 3 seconds. This allows for precise timing in safety-critical applications.