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Siemens 3SK1121-1CB41 safety relay, 24V DC, 2NO + 1NC, expandable, DIN rail, screw terminals, IP20, for E-stop and safety gate applications.

Siemens 3SK1121-1CB41

SKU: 3SK1121-1CB41
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Siemens 3SK1121-1CB41 | SIRIUS Safety Relay – 24V DC, 2NO+1NC, Expandable, Screw Terminals

Overview

The Siemens 3SK1121-1CB41 is a basic safety relay from the SIRIUS 3SK1 series, used for monitoring emergency stop buttons, safety doors, and light curtains in industrial safety systems. It features 2 normally open (NO) and 1 normally closed (NC) outputs, operates at 24V DC, and is expandable for more complex safety logic. The unit mounts on a DIN rail and uses screw terminals for secure wiring.

Key Features

  • Control Voltage: 24V DC

  • Output Contacts: 2 NO + 1 NC

  • Function: Safety monitoring for E-stop, gates, and more

  • Expandable: With input/output extension modules

  • Mounting Type: DIN rail

  • Terminals: Screw connection

  • Width: 22.5 mm (compact housing)

  • Protection Rating: IP20

  • Status Indicators: LED diagnostics for channel and power status

Technical Specifications

  • Part Number: 3SK1121-1CB41

  • Series: SIRIUS 3SK1 Basic Units

  • Response Time: ≤ 30 ms

  • Electrical Life: Up to 100,000 switching cycles at rated load

  • Mechanical Life: Up to 10 million operations

  • Ambient Temperature: –25°C to +55°C

  • Standards: EN ISO 13849-1 (PL e), IEC 62061 (SIL 3), UL, CE, RoHS

Applications

  • Emergency stop circuits

  • Safety gate and interlock monitoring

  • Light curtain and two-hand control monitoring

  • Industrial machinery and automation panels

  • Functional safety applications with logic expansion needs

Why Choose the 3SK1121-1CB41?

  • Compact and Expandable: Ideal for scalable safety systems

  • Flexible Wiring: 2NO + 1NC configuration for versatile output use

  • Reliable Protection: Meets highest safety performance standards

  • Simple Integration: Screw terminals and LED diagnostics streamline setup

  • Proven Siemens Quality: Long-lasting and robust design

Order Now

The Siemens 3SK1121-1CB41 safety relay is in stock and ready to ship worldwide.

New & Genuine Products – Factory Sealed At PLCpartssolution, all our products are 100% new, genuine, and come in original factory-sealed packaging. We guarantee authentic components that meet the highest industry standards for performance and reliability.
1-Year Warranty Included All new products sold by PLCpartssolution come with a 1-year warranty. We stand behind the quality and reliability of our parts, ensuring coverage against manufacturing defects under normal operating conditions.
Disclaimer: PLCpartssolution is an independent supplier of surplus and refurbished industrial automation products. We are not an authorized distributor, reseller, or representative of the brands listed on this website. All trademarks, brand names, and logos are the property of their respective owners. PLCpartssolution is not affiliated with, endorsed by, or approved by ABB, Fanuc, B&R, Rockwell Automation, Schneider Electric, Siemens, or any other manufacturers mentioned.

Description

Siemens 3SK1121-1CB41 | SIRIUS Safety Relay – 24V DC, 2NO+1NC, Expandable, Screw Terminals

Overview

The Siemens 3SK1121-1CB41 is a basic safety relay from the SIRIUS 3SK1 series, used for monitoring emergency stop buttons, safety doors, and light curtains in industrial safety systems. It features 2 normally open (NO) and 1 normally closed (NC) outputs, operates at 24V DC, and is expandable for more complex safety logic. The unit mounts on a DIN rail and uses screw terminals for secure wiring.

Key Features

  • Control Voltage: 24V DC

  • Output Contacts: 2 NO + 1 NC

  • Function: Safety monitoring for E-stop, gates, and more

  • Expandable: With input/output extension modules

  • Mounting Type: DIN rail

  • Terminals: Screw connection

  • Width: 22.5 mm (compact housing)

  • Protection Rating: IP20

  • Status Indicators: LED diagnostics for channel and power status

Technical Specifications

  • Part Number: 3SK1121-1CB41

  • Series: SIRIUS 3SK1 Basic Units

  • Response Time: ≤ 30 ms

  • Electrical Life: Up to 100,000 switching cycles at rated load

  • Mechanical Life: Up to 10 million operations

  • Ambient Temperature: –25°C to +55°C

  • Standards: EN ISO 13849-1 (PL e), IEC 62061 (SIL 3), UL, CE, RoHS

Applications

  • Emergency stop circuits

  • Safety gate and interlock monitoring

  • Light curtain and two-hand control monitoring

  • Industrial machinery and automation panels

  • Functional safety applications with logic expansion needs

Why Choose the 3SK1121-1CB41?

  • Compact and Expandable: Ideal for scalable safety systems

  • Flexible Wiring: 2NO + 1NC configuration for versatile output use

  • Reliable Protection: Meets highest safety performance standards

  • Simple Integration: Screw terminals and LED diagnostics streamline setup

  • Proven Siemens Quality: Long-lasting and robust design

Order Now

The Siemens 3SK1121-1CB41 safety relay is in stock and ready to ship worldwide.

Condition

New & Genuine Products – Factory Sealed At PLCpartssolution, all our products are 100% new, genuine, and come in original factory-sealed packaging. We guarantee authentic components that meet the highest industry standards for performance and reliability.

Warranty

1-Year Warranty Included All new products sold by PLCpartssolution come with a 1-year warranty. We stand behind the quality and reliability of our parts, ensuring coverage against manufacturing defects under normal operating conditions.

Disclaimer

Disclaimer: PLCpartssolution is an independent supplier of surplus and refurbished industrial automation products. We are not an authorized distributor, reseller, or representative of the brands listed on this website. All trademarks, brand names, and logos are the property of their respective owners. PLCpartssolution is not affiliated with, endorsed by, or approved by ABB, Fanuc, B&R, Rockwell Automation, Schneider Electric, Siemens, or any other manufacturers mentioned.
Siemens 3SK1121-1CB41

Siemens 3SK1121-1CB41

$500.00
Add to wishlist
Siemens 3SK1121-1CB41

Siemens 3SK1121-1CB41

Your Price:
$500.00
Item Added to Your Cart
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