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Siemens 3SK1211-1BW20

Name: 3SK1211-1BW20
Brand: Siemens
SKU: 3SK1211-1BW20
Price: 125.86 GBP
Availability: InStock

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£125.86 (ex. VAT)

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Marvo Stock ID MV-BC86

HS Code 85364900

SKU 3SK1211-1BW20

Condition Used

Warranty 12 months

Weight (kg) 1.00

Length (mm) 320.00

Width (mm) 250.00

Height (mm) 250.00

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Specification & Description

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Commonly Asked Questions

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Specification & Description

Specification	Description
Part Number	3SK1211-1BW20
Alternative Part Number	3SK12111BW20
Manufacturer	Siemens
Series	SIRIUS
Product Type	Safety Relay
Supply Voltage	110 to 240 V ac/dc
Output Configuration	4 Normally Open (NO) contacts
Terminal Type	Screw Terminal
Dimensions	22.5 x 121.6 x 100 mm
Mounting Type	Screw and snap-on mounting
Operating Frequency Maximum	360 operations/hour
Switching Capacity of NO Contacts	At 24 V DC: 5 A; At 115 V DC: 0.2 A
Insulation Voltage	Rated value 300 V
Ambient Operating Temperature	-25 to +60 °C
Storage Temperature	-40 to +80 °C
Protection Class	IP20
Vibration Resistance	According to IEC 60068-2-6: 5 ... 500 Hz: 0.75 mm
Shock Resistance	10g / 11 ms
Surge Voltage Resistance	Rated value 4,000 V
EMC	Suitable for Class A environments only
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	0.0000000017 1/h according to EN 62061
PFDavg	0.000001 according to IEC 61508
T1 Value	20 years for proof test interval or service life according to IEC 61508
Hardware Fault Tolerance (HFT)	1 according to IEC 61508
Safety Device Type	Type A according to IEC 61508-2
Approvals	TÜV and UL approved

The Siemens SIRIUS Series Safety Relay, part number 3SK1211-1BW20, is a sophisticated and reliable component designed for seamless integration into safety systems within industrial environments. This safety relay is an output expansion module that features four normally open (NO) contacts for relay enabling circuits, along with an additional normally closed (NC) contact for relay signalling purposes.

Crafted to operate with a supply voltage ranging from 110 to 240 V ac/dc, the 3SK1211-1BW20 ensures flexibility and compatibility with various power systems. The unit's screw terminal connection offers a secure and durable means of integrating the relay into existing setups.

With dimensions of 22.5 x 121.6 x 100 mm, this compact device is engineered to fit neatly into control panels without occupying excessive space, making it an ideal choice for applications where space is at a premium. The relay's enclosure is rated at IP20, providing a basic level of protection against solid objects and ensuring that the internal components are finger-safe.

The 3SK1211-1BW20 is designed to meet stringent safety standards, boasting a Safety Integrity Level (SIL) of 3 according to IEC 61508, a Performance Level (PL) of e to EN ISO 13849-1, and a Category 4 according to EN ISO 13849-1. These certifications underscore the relay's capability to function as a critical part of a safety system, helping to manage and mitigate risks in industrial processes.

This safety relay is suitable for Class A environments only, as it may cause undesired radio-frequency interference in residential settings. In such cases, appropriate measures must be taken to prevent interference.

The Siemens SIRIUS Series Safety Relay is a testament to Siemens' commitment to quality, reliability, and safety in industrial automation. It is an essential component for those seeking to enhance the safety and functionality of their control systems.

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.

What payment methods do you accept?

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 voltage range for this safety relay?

The safety relay operates within a voltage range of 110 to 240 V ac/dc, making it versatile for various power supply conditions.

Can you describe the terminal type of this relay?

This relay features a screw terminal connection, which provides a secure and reliable means of connecting wires.

What is the size of this safety relay?

The dimensions of the safety relay are 22.5 x 121.6 x 100 mm, which is a standard size for easy integration into control panels.

What type of contacts does this relay have?

The relay is equipped with 4 normally open (NO) contacts for output expansion and 1 normally closed (NC) contact for relay signalling circuits.

What is the insulation voltage rating for this device?

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

What are the environmental operating conditions for this relay?

The relay can operate within an ambient temperature range of -25 to +60 °C and can be stored in temperatures ranging from -40 to +80 °C. It's also designed to withstand an installation altitude of up to 2,000 metres above sea level.

What is the protection class of the enclosure?

The enclosure of this safety relay is rated at IP20, which means it is protected against solid objects larger than 12.5 mm but not against water.

What is the maximum operating frequency of this relay?

The maximum operating frequency for the relay's NO contacts is 360 operations per hour.

What certifications does this safety relay comply with?

This safety relay complies with EMC Class A standards, indicating it is suitable for industrial environments but may cause radio-frequency interference in residential areas.

What safety categories does this relay meet?

The relay meets Safety Integrity Level (SIL) 3, Performance Level (PL) e, and Category 4 according to EN ISO 13849-1, making it suitable for high safety requirements.

Part conditions explained

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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.

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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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