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3SK1121-2AB40
Siemens 3SK1121-2AB40 available at EU Automation. Get in touch today for a quick price.
Based on over 4900 reviews
Full 12-month warranty
Available for dispatch immediately
We deliver worldwide
What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
All orders are subject to product availability. See our T&Cs.
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What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
The Siemens 3SK1121-2AB40 is a state-of-the-art safety relay from the 3SK1 series, designed to ensure the highest standards of safety in industrial environments. This compact device, measuring 22.5 x 100 x 121.6 mm, is engineered to seamlessly integrate into a variety of control systems, providing reliable protection and monitoring for machinery and personnel. Equipped with a 24 V dc control supply voltage, the relay is suitable for Class A environments, adept at managing undesired radio-frequency interference in such settings with appropriate measures. It features a single-channel input that can be wired in either a single or dual-channel configuration, enhancing its versatility and application scope. The safety relay boasts an impressive safety integrity level (SIL) of 3 according to IEC 61508 and a performance level (PL) of e according to EN ISO 13849-1, categorised at level 4. With a safe failure fraction (SFF) of 99%, it ensures a high degree of reliability and safety. The hardware fault tolerance is rated at 1, and the device is classified as a Type B safety device according to IEC 61508-2. For signalling functions, the relay includes 1 normally closed (NC) contact and 3 normally open (NO) safety-related contacts, ensuring immediate and reliable response to safety conditions. The product is also designed with cross-circuit detection and monitored start-up features, adding an extra layer of safety during operation. The Siemens 3SK1121-2AB40 is designed for easy installation with its screw and snap-on mounting options, and it supports a wide range of conductor cross-sections for flexible connection requirements. Its push-in terminal connection type simplifies the wiring process, making it user-friendly and time-efficient for setup. This safety relay is an essential component for applications requiring stringent safety measures, such as emergency stop functions, safety door monitoring, and light curtain integration. Its robust design and advanced safety features make it a reliable choice for safeguarding complex industrial processes.
Typical applications
- Monitoring and controlling safety functions in industrial automation systems
- Integration into emergency stop circuits for machinery
- Safeguarding protective doors and guards on equipment
- Implementing safety measures for light curtains and safety mats
- Managing safety functions in automated assembly lines
- Overseeing safe operation of presses and robotic arms
- Ensuring safe stop and start functions in conveyor systems
- Providing safety interlock switching for packaging machines
- Controlling access to hazardous areas through safety gates
- Use in safety circuits for woodworking and metalworking machinery
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Need more information?
Our global network and dedicated team act fast to keep your supply chain moving.
Contact usCan't find what you're looking for?
Find answers, guidance and resources to help you get the most out of our services.
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What our customers say
"Alex Bailey is my main point of contact at EU Automation...he is extremely friendly, has exceptional customer service skills and always offers great pricing & lead times."
"Tom Higgins provided great prompt service. I contacted Tom by phone and within 10 minutes there was a quote in my in box. WOW Thank you Tom and Thank you EU Automation!"
"Excellent service and communication from Alex Bailey. He truly goes above and beyond to ensure his clients are 100% satisfied. The entire process was seamless, and his attention to detail made a huge difference. Highly recommended for anyone looking for amazing service!"
"Tom Higgins did a great job at getting us the part we needed. He saw a concern with the part a verified before shipping. "
"Thomas Higgins has gone above and beyond to make things happen for my facility. His customer service and knowledge were an asset in helping me with my order and the logistics challenges! "
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Full 12-month warranty
ISO 9001:2015 certified
Swift global delivery
"The prompt delivery knowing it was urgent was amazing! We are confident when EU Automation says they will try to ship as soon as possible they really mean it. Our company will definitely use them again. Service is astounding."
Courtney Zeinert
Facilities Manager
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