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3SK1122-1CB42

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Marvo Stock ID MV-BC7Z
HS Code 85371098
SKU 3SK1122-1CB42
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

Specification Description
Part Number 3SK1122-1CB42
Alternative Part Number 3SK11221CB42
Manufacturer Siemens
Series SIRIUS
Product Type Safety Relay
Supply Voltage 24 V dc
Number of Channels 1-Channel
Output Configuration 2 Normally Open (NO)
Dimensions 22.5 x 121.7 x 100 mm
Mounting Type Screw and snap-on mounting
Connection Type Screw-type terminals
Conductor Cross-Section Solid: 1x (0.5 ... 2.5 mm²), 2x (1.0 ... 1.5 mm²); Stranded: 1x (20 ... 16), 2x (20 ... 16)
Enclosure Protection IP20
Insulation Voltage Rated value 50 V
Ambient Operating Temperature -25 ... +60 °C
Storage Temperature -40 ... +80 °C
Relative Humidity 10 ... 95 %
Installation Altitude Up to 2,000 m above sea level
Vibration Resistance 5 ... 500 Hz: 0.75 mm
Shock Resistance 10g / 11 ms
Surge Voltage Resistance Rated value 800 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
Safe Failure Fraction (SFF) 99 %
PFHD 0.0000000015 1/h
PFDavg 0.000007
T1 Value 20 years
Hardware Fault Tolerance 1 according to IEC 61508
Safety Device Type Type B according to IEC 61508-2

The Siemens SIRIUS Series Safety Relay, part number 3SK1122-1CB42, is a state-of-the-art control device designed to enhance the safety of machinery and plant operations. This compact and reliable unit is engineered to meet stringent safety requirements, making it an essential component for a wide range of industrial applications.

With a 24 V dc operating voltage, the relay is equipped with 1-channel monitoring capability and offers 2 normally open (NO) contacts. Its dimensions are 22.5 x 121.7 x 100 mm, allowing for easy integration into existing systems without the need for significant modifications.

The safety relay is designed for single-channel and two-channel wiring configurations, providing flexibility in connection and ensuring compatibility with various types of safety sensors and switches. It also features cross-circuit detection and an integrated startup test function, which contribute to the overall safety and reliability of the system it is part of.

The 3SK1122-1CB42 is characterised by its parameterisable product functions, including sensor monitoring, autostart, and time delay settings, which can be adjusted to suit specific application requirements. This adaptability makes it a versatile choice for monitoring safety functions such as emergency stops, protective doors, light curtains, and two-hand controls.

Constructed with finger-safe terminals and an IP20 protection class, the relay ensures user safety during installation and maintenance. It is suitable for Class A environments and is designed to prevent undesired radio-frequency interference in residential areas.

This safety relay is an integral component for those seeking to maintain high levels of safety while ensuring operational efficiency and compliance with international safety standards.

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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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.

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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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Frequently Asked Questions

What is the voltage rating for this safety relay?

The safety relay operates at a voltage rating of 24 V dc.

Can you describe the safety relay's switching capability?

This safety relay features electronic enabling circuits with 2 normally open (NO) instantaneous contacts and 2 NO delayed contacts.

What are the dimensions of the safety relay?

The dimensions of the safety relay are 22.5 mm in width, 121.7 mm in height, and 100 mm in depth.

What is the IP rating of this safety relay?

The safety relay has an IP20 protection class, ensuring protection against solid objects larger than 12.5 mm but not against liquids.

What is the ambient operating temperature range for this relay?

The relay is designed to operate within an ambient temperature range of -25 to +60 degrees Celsius.

What is the significance of the SIL rating for this relay?

The Safety Integrity Level (SIL) rating indicates the reliability of the safety functions performed by the relay. This relay has a SIL3 rating, which is suitable for high-risk applications.

What is the Performance Level (PL) of this safety relay?

The Performance Level (PL) for this relay is rated at PL e, which is the highest level of risk reduction achievable by safety-related parts of control systems.

Can this safety relay be used for single-channel and two-channel wiring?

Yes, the safety relay supports both single-channel and two-channel safety-related wiring of the inputs.

What is the maximum installation altitude for this relay?

The maximum installation altitude for the relay is 2,000 metres above sea level.

Does this safety relay have a time delay feature?

Yes, the relay includes a time delay feature with a range of 0.5 to 30 seconds.

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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.