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Siemens 3SK1121-2AB40 SIRIUS safety relay, 24V DC, 3 NO + 1 NC, 1/2-channel input, DIN rail, IP20, for emergency stop and guard monitoring.

Siemens 3SK1121-2AB40

SKU: 3SK1121-2AB40
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$760.00
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Siemens 3SK1121-2AB40 | Basic SIRIUS Safety Relay – 24V DC, 3NO + 1NC for Emergency Stop & Safety Gate Monitoring

Overview

The Siemens 3SK1121-2AB40 is a SIRIUS safety relay designed for emergency stop, safety door monitoring, and light curtain integration in standard industrial applications. Operating at 24V DC, it offers 3 normally open (NO) safety outputs and 1 normally closed (NC) signaling output, with support for both 1-channel and 2-channel input configurations.

Key Features

  • Input Channels: 1- or 2-channel safety inputs

  • Output Contacts:

    • 3 × NO (Safety Contacts)

    • 1 × NC (Monitoring/Signal Contact)

  • Control Voltage: 24V DC

  • Response Time: < 30 ms

  • Mounting: 35 mm DIN rail (EN 60715)

  • Status Indicators: LED indicators for input and output status

  • Width: 22.5 mm – space-saving design

  • Protection Rating: IP20 (housing), IP40 (front)

Technical Specifications

  • Part Number: 3SK1121-2AB40

  • Series: SIRIUS 3SK1

  • Rated Voltage: 24V DC

  • Rated Current (per output): Up to 6A @ 250V AC

  • Utilization Category: AC-15, DC-13

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

  • Dimensions (HxWxD): Approx. 100 × 22.5 × 120 mm

  • Certifications: CE, UL, CSA, TUV, SIL 3, PL e, Cat. 4, RoHS

Applications

  • Emergency stop pushbuttons

  • Safety door switches and interlocks

  • Safety light curtains

  • Two-hand control systems

  • General machine safety logic

Why Choose the 3SK1121-2AB40?

  • Flexible Configuration: Supports 1- and 2-channel applications

  • Compact Design: Saves space in control panels

  • Compliant with Global Standards: SIL 3 / PL e / Cat. 4 certified

  • Quick Installation: Screw terminals and clear LED diagnostics

  • Reliable Siemens Safety: Proven in industrial automation

Order Now

The Siemens 3SK1121-2AB40 safety relay is in stock and available for global shipping.

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 3SK1121-2AB40 | Basic SIRIUS Safety Relay – 24V DC, 3NO + 1NC for Emergency Stop & Safety Gate Monitoring

Overview

The Siemens 3SK1121-2AB40 is a SIRIUS safety relay designed for emergency stop, safety door monitoring, and light curtain integration in standard industrial applications. Operating at 24V DC, it offers 3 normally open (NO) safety outputs and 1 normally closed (NC) signaling output, with support for both 1-channel and 2-channel input configurations.

Key Features

  • Input Channels: 1- or 2-channel safety inputs

  • Output Contacts:

    • 3 × NO (Safety Contacts)

    • 1 × NC (Monitoring/Signal Contact)

  • Control Voltage: 24V DC

  • Response Time: < 30 ms

  • Mounting: 35 mm DIN rail (EN 60715)

  • Status Indicators: LED indicators for input and output status

  • Width: 22.5 mm – space-saving design

  • Protection Rating: IP20 (housing), IP40 (front)

Technical Specifications

  • Part Number: 3SK1121-2AB40

  • Series: SIRIUS 3SK1

  • Rated Voltage: 24V DC

  • Rated Current (per output): Up to 6A @ 250V AC

  • Utilization Category: AC-15, DC-13

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

  • Dimensions (HxWxD): Approx. 100 × 22.5 × 120 mm

  • Certifications: CE, UL, CSA, TUV, SIL 3, PL e, Cat. 4, RoHS

Applications

  • Emergency stop pushbuttons

  • Safety door switches and interlocks

  • Safety light curtains

  • Two-hand control systems

  • General machine safety logic

Why Choose the 3SK1121-2AB40?

  • Flexible Configuration: Supports 1- and 2-channel applications

  • Compact Design: Saves space in control panels

  • Compliant with Global Standards: SIL 3 / PL e / Cat. 4 certified

  • Quick Installation: Screw terminals and clear LED diagnostics

  • Reliable Siemens Safety: Proven in industrial automation

Order Now

The Siemens 3SK1121-2AB40 safety relay is in stock and available for global shipping.

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 3SK1121-2AB40

Siemens 3SK1121-2AB40

$760.00
Add to wishlist
Siemens 3SK1121-2AB40

Siemens 3SK1121-2AB40

Your Price:
$760.00
Item Added to Your Cart
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