Need more information?

Call us at:+48 17 778 34 19

Siemens 3SK1211-2BB40

Name: SIRIUS Safety Relay, 4RO, 4NO+1NC, 24VAC, Spring-Type
Brand: Siemens
SKU: 3SK1211-2BB40

SIRIUS Safety Relay, 4RO, 4NO+1NC, 24VAC, Spring-Type

1 / 1

Manufacturer catalogue image

Product Description

RoHS CompliantLifecycle Status:

The SIRIUS Safety Relay Output Extension 4RO is a robust solution designed for enhanced safety in automation systems. This relay incorporates relay enabling circuits, providing four normally open (NO) contacts and one normally closed (NC) contact. The relay signaling circuit further enhances the functionality of this device, making it an ideal choice for applications requiring precise control over electrical circuits.

Key Features:

Relay enabling circuits for reliable operation
Four normally open (NO) contacts and one normally closed (NC) contact
24V DC spring-type terminal (push-in) for easy connection

Need more information?

Call us at:+48 17 778 34 19

Compare offers

Payment methods:

Offer details

Offer from:: Trusted supplier — Poland, member since 2021, 5–9 employees
Availability:: 1 pc.
In-Stock
Updated at: 13-10-2026
Warranty:: 12 months
Condition:: New Surplus

New Surplus - A new, unused, undamaged item without a manufacturer guarantee. The item may come without original packaging or in replacement packaging. If provided, the box may have been opened.

The Seller is responsible for shipping the product and invoicing

Specifications

Brand: Siemens
Type of actuation: DC
Muting possible
Approval for UL present
Functional safety (SIL): SIL 3
Feedback circuit present
Stop Category acc. to IEC 60204: 0

Available Offers

(22)

Condition	Availability	Supplier	Warranty
Condition New Surplus	Availability 1 pc. In-Stock Updated at: 13-10-2026	Supplier PolandTrusted supplier — member since 2021, 5–9 employees	Warranty 12 months
Condition New Surplus	Availability 7 pcs. In-Stock Updated at: 10-03-2026	Supplier GermanyTrusted supplier — member since 2022	Warranty 1 month
Condition Used	Availability 1 pc. In-Stock Updated at: 10-03-2026	Supplier GermanyTrusted supplier — member since 2022	Warranty 1 month
Condition Refurbished	Availability 6 pcs. In-Stock Updated at: 01-10-2026	Supplier GermanyTrusted supplier — member since 2024	Warranty 24 months
Condition New Surplus	Availability 3 pcs. In-Stock Updated at: 01-10-2026	Supplier GermanyTrusted supplier — member since 2024	Warranty 24 months
Condition New Surplus	Availability 54 pcs. In-Stock Updated at: 01-10-2026	Supplier GermanyTrusted supplier — member since 2024	Warranty 24 months

Offer with manufacturer lead time

Directly from the manufacturer - with a confirmed, predictable, and fully transparent delivery time.

Documents

Data Sheet

Datasheet for Siemens 3SK1211-2BB40, including specifications and features.

Download Data Sheet

CAD Models

3D CAD model and technical drawings, ready for your design software.

Download CAD Model

Product data updated: 13-10-2026

Related products

3SK1211-1BB00Siemens

Expand your SIRIUS safety relay's output capabilities with this extension module featuring 4 relay outputs and enabling circuits, along with 4 normally open (NO) contacts and a relay signaling circuit.

3SK1213-1AB40Siemens

SIRIUS safety relay output extension 3ro power, with relay enabling circuits

3SK1122-1CB44Siemens

SIRIUS safety relay Basic unit Advanced series with time delay 5-300 s electronic enabling circuits 2 NO instantaneous 2 NO delayed Us = 24 V DC screw terminal

3SK1112-2BB40Siemens

SIRIUS safety relay standard series device electronic outputs 2 enabling circuits + 1 signaling circuit Us = 24 V DC spring-loaded terminal

3SK1211-2BB00Siemens

Expand your safety relay output with the SIRIUS model, featuring 4 relay outputs and enabling circuits.

3SK1121-1AB40Siemens

SIRIUS safety relay Basic unit Advanced series Relay enabling circuits 3 NO contacts plus Relay signaling circuit 1 NC contact Us = 24 V DC screw terminal

3SK1121-2CB42Siemens

SIRIUS safety relay Basic unit Advanced series with time delay 0.5-30 s Relay enabling circuits 2 NO instantaneous 2 NO delayed Us = 24 V DC Spring-type terminal (push-in)

3SK1111-1AW20Siemens

SIRIUS safety relay Basic unit Standard series Relay enabling circuits 3 NO contacts plus Relay signaling circuit 1 NC contact Us = 110 - 240 V AC/DC 50/60 Hz screw terminal

3SK1211-1BW20Siemens

SIRIUS safety relay output expansion with relay enabling circuits for 4 NO contacts and relay signaling circuit for 1 NC contact Us = 110-240 V AC/DC screw terminal.

3SK1120-2AB40Siemens

SIRIUS safety relay Basic unit Advanced series electronic enabling circuits 1 enabling circuit 0.5 A Us = 24 V DC Spring-type terminal (push-in)

3SK1121-1CB42Siemens

SIRIUS safety relay Basic unit Advanced series with time delay 0.5-30 s Relay enabling circuits 2 NO instantaneous 2 NO delayed Us = 24 V DC screw terminal

3SK1121-2CB44Siemens

SIRIUS safety relay Basic unit Advanced series with time delay 5-300 s Relay enabling circuits 2 NO instantaneous 2 NO delayed Us = 24 V DC Spring-type terminal (push-in)

AutomaINSIGHTS analytics dashboard for 3SK1211-2BB40

Market insights for 3SK1211-2BB40

Get real-time analytics and market data for 3SK1211-2BB40 and other products from the Contactors & Relays category to optimize your purchasing decisions

Real-time stock availability data from 700 MRO distributors in Europe and USA
Price analysis by condition (new, used, refurbished) with market median prices
Critical component availability monitoring to prevent production downtime

Related categories

Low-Voltage Switchgear Circuit Breakers & Fuses Switches & Modular Apparatus