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Siemens 3SK1211-1BB40 | SIRIUS Safety Relay – 24V DC, 3NO + 1NC, Basic Unit, SIL 3 / PL e, Screw Terminal
Overview
The Siemens 3SK1211-1BB40 is a safety relay basic unit from the SIRIUS 3SK1 series, designed for monitoring safety circuits such as emergency stop buttons, protective door switches, and light curtains. It operates with 24V DC and offers three normally open (NO) and one normally closed (NC) contact outputs. Certified to SIL 3 (IEC 62061) and PL e (EN ISO 13849-1), this compact relay ensures reliable protection for people and machinery.
Key Features
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Input Voltage: 24V DC
-
Output Configuration: 3 NO + 1 NC contacts
-
Function: Basic unit for single or dual-channel safety inputs
-
Terminal Type: Screw terminal connection
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Width: 22.5 mm
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Mounting: DIN rail
-
Safety Standards: SIL 3 / PL e / Cat. 4
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Reset Type: Automatic or manual (selectable via wiring)
Technical Specifications
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Part Number: 3SK1211-1BB40
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Series: SIRIUS 3SK1
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Power Consumption: Approx. 2.5 W
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Switching Capacity: AC-15: 230V/3A; DC-13: 24V/2A
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Ambient Temperature: –25°C to +55°C
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Dimensions (HxWxD): Approx. 100 × 22.5 × 120 mm
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Certifications: CE, UL, cULus, TÜV, EAC, RoHS
Applications
-
Emergency stop circuits
-
Light curtain and safety sensor monitoring
-
Safety interlock systems
-
Industrial machinery requiring Category 4 safety
-
Small to medium-sized control panels
Why Choose the 3SK1211-1BB40?
-
Compact Size: Slim 22.5 mm width saves panel space
-
Certified Safety: Complies with global standards (SIL 3 / PL e)
-
Flexible Use: Compatible with various safety input devices
-
Reliable Siemens Engineering: High switching capacity and durability
-
Easy Installation: DIN rail mount and screw terminals
Order Now
The Siemens 3SK1211-1BB40 safety relay is available and ready for global shipment.
Description
Siemens 3SK1211-1BB40 | SIRIUS Safety Relay – 24V DC, 3NO + 1NC, Basic Unit, SIL 3 / PL e, Screw Terminal
Overview
The Siemens 3SK1211-1BB40 is a safety relay basic unit from the SIRIUS 3SK1 series, designed for monitoring safety circuits such as emergency stop buttons, protective door switches, and light curtains. It operates with 24V DC and offers three normally open (NO) and one normally closed (NC) contact outputs. Certified to SIL 3 (IEC 62061) and PL e (EN ISO 13849-1), this compact relay ensures reliable protection for people and machinery.
Key Features
-
Input Voltage: 24V DC
-
Output Configuration: 3 NO + 1 NC contacts
-
Function: Basic unit for single or dual-channel safety inputs
-
Terminal Type: Screw terminal connection
-
Width: 22.5 mm
-
Mounting: DIN rail
-
Safety Standards: SIL 3 / PL e / Cat. 4
-
Reset Type: Automatic or manual (selectable via wiring)
Technical Specifications
-
Part Number: 3SK1211-1BB40
-
Series: SIRIUS 3SK1
-
Power Consumption: Approx. 2.5 W
-
Switching Capacity: AC-15: 230V/3A; DC-13: 24V/2A
-
Ambient Temperature: –25°C to +55°C
-
Dimensions (HxWxD): Approx. 100 × 22.5 × 120 mm
-
Certifications: CE, UL, cULus, TÜV, EAC, RoHS
Applications
-
Emergency stop circuits
-
Light curtain and safety sensor monitoring
-
Safety interlock systems
-
Industrial machinery requiring Category 4 safety
-
Small to medium-sized control panels
Why Choose the 3SK1211-1BB40?
-
Compact Size: Slim 22.5 mm width saves panel space
-
Certified Safety: Complies with global standards (SIL 3 / PL e)
-
Flexible Use: Compatible with various safety input devices
-
Reliable Siemens Engineering: High switching capacity and durability
-
Easy Installation: DIN rail mount and screw terminals
Order Now
The Siemens 3SK1211-1BB40 safety relay is available and ready for global shipment.