Home › Manufacturers › Siemens › 3SK1121-2CB42

Siemens

Siemens 3SK1121-2CB42 SIRIUS Safety Relay - Basic Unit Advanced

Siemens 3SK1121-2CB42 SIRIUS Safety Relay, Advanced Series.

● In Stock 12-Mo Warranty Same-Day Dispatch Ships Worldwide 🎖 Veteran-Owned

In Stock — Ready to Ship

ManufacturerSiemens

Part number3SK1121-2CB42

Series SIRIUS Advanced

Type Basic Unit

Time Delay 0.5-30 s

Enabling Circuits 2 NO instantaneous

Get a price for 3SK1121-2CB42

Response within 1 business hour

🛡

12-month warranty

All units tested

⚡

Same-day dispatch

Order by 2pm CST

🌐

Worldwide delivery

US, EU, Asia, Middle East

🎖

Veteran-owned

CAGE: 9NK75

Adjustable time delay 0.5-30s 2 NO instantaneous outputs 2 NO delayed outputs 24V DC operation Spring-type (push-in) terminals SIRIUS Advanced series

Product description

The Siemens 3SK1121-2CB42 is a SIRIUS safety relay, belonging to the Advanced series basic unit. It is equipped with a time delay that can be set between 0.5 and 30 seconds, providing flexible timing options. The relay offers 2 instantaneous normally open (NO) enabling circuits and 2 delayed normally open (NO) outputs. It operates on a 24V DC supply voltage and features spring-type (push-in) terminals for efficient installation.

This safety relay is suitable for applications that require longer or more precise time delays in their safety functions, such as in processes with extended machine cycles or controlled stop sequences. It finds use in sectors like process automation, robotics, and heavy machinery.

Stanlo Automation, a veteran-owned supplier, provides the Siemens 3SK1121-2CB42. We are dedicated to offering high-quality surplus industrial parts, ensuring reliability and availability for your automation needs.

Technical specifications

Series	SIRIUS Advanced
Type	Basic Unit
Time Delay	0.5-30 s
Enabling Circuits	2 NO instantaneous
Relay Outputs	2 NO delayed
Supply Voltage	24 V DC
Terminal Type	Spring-type (push-in)

Common applications

Machine control with timed sequences

Industrial safety systems

Automation processes

Robotics safety

Material handling

Hazardous area control

Compatible systems

Integrates with standard safety sensors and control panels requiring 24V DC power.

Also known as

Siemens 3SK1121-2CB42 module SIRIUS safety timer relay 3SK1121 advanced safety relay

Replaces / compatible with

Suitable for applications needing a longer time delay than standard units. Compatible with other components within the Siemens SIRIUS safety system.

Technical note

Expert tip

The extended time delay range of 0.5-30 seconds on the 3SK1121-2CB42 is ideal for safety functions that involve sequential operations or controlled stop procedures.

What happens next?

Email confirmation

Immediate receipt acknowledgment sent to you

Account manager assigned

Confirms your part's spec and condition

Your quote delivered

Tailored to your specific requirements

Frequently asked questions

What is the maximum time delay for the Siemens 3SK1121-2CB42?

The Siemens 3SK1121-2CB42 safety relay offers a maximum adjustable time delay of 30 seconds. This extended range is useful for safety functions that require a longer waiting period.