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Siemens 3SK1211-2BB40

Name: 3SK1211-2BB40
Brand: Siemens
SKU: 3SK1211-2BB40
Price: 55.17 GBP
Availability: InStock

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£55.17 (ex. VAT)

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Marvo Stock ID MV-BC88

HS Code 85364900

SKU 3SK1211-2BB40

Condition Refurbished

Warranty 12 months

Weight (kg) 1.00

Length (mm) 320.00

Width (mm) 250.00

Height (mm) 250.00

EAN 4011209913783

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Specification & Description

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Commonly Asked Questions

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Customer Reviews

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Specification & Description

Specification	Description
Part Number	3SK1211-2BB40
Alternative Part Number	3SK12112BB40
Manufacturer	Siemens
Product Type	Extension Safety Relay Module
Suitable for	Safety Programmable Controllers
Contact Configuration	4 NO (Normally Open) contacts, 1 NC (Normally Closed) feedback circuit
Supply Voltage	24 V dc
Operating Frequency Maximum	360 1/h
Switching Capacity Current	5 A at 24 V dc (DC-13), 0.2 A at 115 V dc, 0.1 A at 230 V dc
Insulation Voltage Rated Value	300 V
Ambient Operating Temperature Range	-25 ... +60 °C
Storage Temperature Range	-40 ... +80 °C
Protection Class IP	IP20
Insulation	Finger-safe
Mounting Position	Any
Mounting Type	Screw and snap-on mounting
Width	22.5 mm
Height	100 mm
Depth	121.6 mm
Connection Type	Spring-loaded terminal (push-in)
Safety Integrity Level (SIL)	SIL3 according to IEC 61508
Performance Level (PL)	e according to EN ISO 13849-1
Category	4 according to EN ISO 13849-1
PFHD	1.7E-9 1/h according to EN 62061
PFDavg	1E-6 according to IEC 61508
T1 Value for Proof Test Interval	20 years according to IEC 61508
Hardware Fault Tolerance	1 according to IEC 61508
Safety Device Type	Type A according to IEC 61508-2
EMC	Suitable for Class B environments, can also be used in domestic environments
Overvoltage Category	3
Degree of Pollution	3
Vibration Resistance	5 ... 500 Hz: 0.75 mm according to IEC 60068-2-6
Shock Resistance	10g / 11 ms
Surge Voltage Resistance	Rated value 4,000 V

The Siemens 3SK1211-2BB40 is a sophisticated extension safety relay module designed to enhance the functionality of safety programmable controllers. This module is an integral component for various industrial applications where safety and reliability are paramount. With a compact design measuring 22.5 x 121.7 x 100 mm, it is engineered to fit seamlessly into control panels without occupying excessive space.

Equipped with four normally open (NO) contacts for safety-related instantaneous switching, the module ensures a high level of safety for machinery and operators alike. It also includes a relay feedback circuit with one normally closed (NC) contact, providing a reliable means of status monitoring for safety systems.

The 3SK1211-2BB40 operates at a control supply voltage of 24 V DC, making it compatible with a wide range of control systems. It boasts an impressive mechanical service life of typically 10 million operating cycles, indicating a long-lasting and durable performance in demanding industrial environments.

This module is designed for any mounting position, offering flexibility in installation, and it features a spring-loaded terminal (push-in) connection type for quick and secure wiring. With an insulation voltage rated at 300 V and a protection class of IP20, the unit is safeguarded against electrical interference and offers finger-safe protection against electrical shock.

The safety relay module is compliant with a variety of international standards, including a Safety Integrity Level (SIL) of 3 according to IEC 62061 and IEC 61508, and a Performance Level (PL) of e according to ISO 13849-1. It also falls under Category 4 according to EN ISO 13849-1, reflecting its capability to perform at the highest level of safety for control systems.

In summary, the Siemens 3SK1211-2BB40 is a reliable and efficient solution for expanding the output capabilities of safety control systems, ensuring both the protection of personnel and machinery in a wide array of industrial settings.

Commonly Asked Questions

Is my order covered by a warranty?

Marvo provides a full 12-month warranty on all products, whatever the condition. For your peace of mind, all parts are ‘Marvo Approved’ which means that they have been tested and checked to ensure that they are in working condition. If you are unhappy with the part(s) you received and would like to request a return, you can do so by completing our quick and easy online form. Once we have received your Returns Request, a member of the team will be in touch to discuss this further with you. You can read more about our warranty policy here.

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We accept card payments from all major credit, debit and Mastercard providers including Visa, American Express, Western Union, Paypal and bank transfers. Before you complete an order you will be prompted to input your payment details, at which point you can enter the relevant card information you wish to use for your transaction. If you are experiencing issues with your payment method then you can contact our team via email here. From there, you will be directed to the most relevant resource or person to help you complete your payment, get your order processed and ensure that your parts are on the way to your delivery address.

Is Marvo a credible parts supplier?

Marvo is a highly credible supplier of industrial automation parts and components with dedicated hubs around the world offering industry-leading products and services. Marvo is committed to providing a quick, easy and reliable place to source your automation and control components. All purchases come as standard with a comprehensive 12-month return to base warranty meaning that, in just a few clicks, you can source critical parts more seamlessly than ever before. Click here to read an article on how Marvo is redefining convenience for automation and manufacturing professionals.

Have steps been taken to ensure quality control?

Marvo takes pride in product quality and has put several measures in place to assure high levels of quality standards. For your peace of mind, all parts have been ‘Marvo Approved’ which means that they have been tested and checked to ensure that they are in working condition. Redefine convenience and secure priority delivery on all parts along with a comprehensive 12-month warranty. This is the smart new way to buy automation and control components.

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Our service to you

Lightning-Fast Express Shipping: Receive your order in record time with our express shipping options, ensuring you minimize downtime and keep your projects on track.

No-Risk Returns, Guaranteed: Return your parts anytime for a full refund. Our hassle-free return policy ensures you’re never stuck with something you don’t need.

Clear Pricing with No Hidden Fees: What you see is what you pay, transparent pricing with no extra costs, ever. Rest assured, all taxes and fees are already included in your final price.

Rock-Solid Reliability at a Fraction of the Cost: Get pre-owned electronic parts that are fully tested for peak performance, saving you money without compromising on quality, backed by a comprehensive warranty.

Frequently Asked Questions

What is the function of this extension safety relay module?

The extension safety relay module is designed to expand the output capacity of safety programmable controllers. It provides additional relay outputs for enabling circuits and feedback circuits, enhancing the control and safety features of a system.

Can this safety relay module be used in domestic environments?

Yes, this safety relay module is suitable for Class B environments, which means it can also be used in domestic settings.

What type of connections does this module support?

The module supports spring-type terminal connections, also known as push-in connections, which allow for quick and secure wiring without the need for tools.

What is the maximum operating altitude for this module?

The maximum operating altitude for the module is 2,000 metres above sea level. Beyond this altitude, derating may be necessary.

What are the ambient temperature limits for the operation of this module?

The module can operate within an ambient temperature range of -25 to +60 degrees Celsius during operation, and it can be stored in temperatures ranging from -40 to +80 degrees Celsius.

What is the insulation voltage rating for this safety relay module?

The insulation voltage rated value for this module is 300 V.

What is the significance of the SIL and PL ratings for this module?

The Safety Integrity Level (SIL) and Performance Level (PL) ratings indicate the reliability and safety performance of the module. A SIL3 and PL e rating signify that the module meets high safety requirements for use in systems that require a high level of risk reduction.

What is the maximum switching capacity for the NO contacts of the relay outputs?

The maximum switching capacity for the Normally Open (NO) contacts of the relay outputs is 5 A at 24 V for DC-13 and 5 A at 24 V, 115 V, and 230 V for AC-15.

How does the module protect against electrical shock?

The module is designed with finger-safe terminals to protect against electrical shock, ensuring a safer installation and maintenance process.

What is the mechanical service life of the relay contacts?

The mechanical service life of the relay contacts is typically 10 million operating cycles, indicating the module's durability and longevity.

Part conditions explained

We want your buying experience to be as seamless as possible. So, here are all of the product descriptions you will see when browsing Marvo, explained a little further:

New unsealed: The product is in its original packaging, but the packaging has been opened or unsealed. It has never been used and should be in near pristine condition.

New sealed: The product is sealed in its original packaging. It has never been opened or used, ensuring that it's in an untouched state.

New unboxed: The product does not come in its original packaging, but it has never been used and is in great working condition.

Refurbished: The product has been previously used, but it has undergone a thorough refurbishment process to restore it to a like-new or functional condition. Any defects or issues have been addressed, making it suitable for reuse.

Used: The product has been previously owned and has been used. It may show signs of wear and tear but is still functional and operational. The condition may vary depending on the specific item and its usage history.

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