*Image shown is a representation only. Actual product may vary.
SIEMENS 3SK1121-1CB42
by Siemens
Read verified buyer reviews ↓OverviewThe SIEMENS 3SK1121-1CB42 stands as a premium safety relay module, integral to the distinguished SIRIUS 3SK1 range. It is meticulously crafted to deliver exceptional protection and precise control within demanding industrial settings. This crucial device is engineered to oversee and manage critical safety functions, thereby securing the operational soundness of machinery and personnel well-being. Its sturdy construction and advanced features not only guarantee adherence to strict global safety regulations but also facilitate seamless incorporation into new and existing automation frameworks. The 3SK1121-1CB42 is a cornerstone for dependable and efficient safety circuit management, minimizing risks and maximizing operational uptime.Key Features Accurate Safety Supervision Specifically developed for monitoring and regulating diverse safety circuits, ensuring rapid reaction to dangerous situations. SIRIUS 3SK1 Series Reliability A distinguished member of SIEMENS's renowned SIRIUS 3SK1 family, celebrated for consistent performance and cutting-edge safety technology. Broad Compatibility Integrates effortlessly with vital safety components like emergency stop buttons, safety switches, and light curtains for all-encompassing protection. Compact, Space-Saving Design Conceived with a minimal footprint, enabling efficient setup and optimal use of valuable space within control panels. DIN Rail Mounting Permits swift and secure installation on standard DIN rails, streamlining both setup and maintenance processes. Adherence to International Safety Standards Guarantees conformity with worldwide safety directives, offering reassurance and aiding in regulatory compliance checks. Enhanced System Dependability Contributes to the overall stability and reliability of industrial automation systems by providing powerful safety guarantees. Technical SpecificationsThe SIEMENS 3SK1121-1CB42 safety relay module features technical specifications that highlight its suitability for various industrial applications: Product Type: Safety relay module Series: SIRIUS 3SK1 Voltage Rating: Optimized for typical industrial operating voltages (refer to SIEMENS data sheets for precise details). Mounting Type: DIN rail installation for universal compatibility and straightforward integration. Safety Standards: Meets relevant international safety standards (e.g., IEC 61508, EN ISO 13849-1), confirming a high safety integrity level. Function: Management and supervision of safety circuits. Applications Industrial Automation and Machine Safety: A vital component for protecting complex industrial machinery and ensuring operator safety. Emergency Stop Systems: Delivers dependable and immediate shutdown features crucial for accident prevention. Process Control Environments: Integrated into control systems to maintain safety compliance and avert hazardous conditions in various manufacturing sectors. Conveyor Systems and Material Handling: Assures safe functioning of material transport systems by overseeing safety gates, emergency stops, and other protective devices. Robotics and Automated Assembly Lines: Essential for defining secure operational zones around robotic workstations and automated assembly units. Packaging and Food Processing Industries: Utilized to implement safety functions in equipment handling food and packaging materials, adhering to stringent industry guidelines. Why Choose This Model?Unwavering Safety AssuranceThe SIEMENS 3SK1121-1CB42 provides consistent and dependable safety monitoring, substantially lowering the risk of machinery-related incidents.Trusted Brand QualityBenefit from the superior engineering and production excellence associated with the SIEMENS brand, a global leader in industrial automation.Effortless IntegrationIts standard design and extensive compatibility features enable quick and simple integration into existing systems, minimizing downtime.Order NowUpgrade your industrial safety protocols. The SIEMENS 3SK1121-1CB42 is an essential asset for any operation prioritizing safety and reliability. Contact us today for pricing and availability, and enhance your system's protection with this advanced safety relay module.FAQWhat specific safety standards does the SIEMENS 3SK1121-1CB42 comply with?This module adheres to critical international safety standards such as IEC 61508 and EN ISO 13849-1, ensuring a high level of safety integrity.Can this safety relay module be used with different types of safety devices?Yes, the 3SK1121-1CB42 offers versatile compatibility, allowing seamless integration with various safety components including emergency stop buttons, safety switches, and light curtains.Is the installation of the SIEMENS 3SK1121-1CB42 complicated?No, it features DIN rail mounting, which allows for quick, secure, and straightforward installation, simplifying setup and maintenance procedures.
USA — Free FedEx Priority & UPS Ground · Worldwide shipping available
For more quantity please contact Customer Service
Fast Shipping
Dispatched quickly on in-stock items via UPS, FedEx & DHL worldwide.
Availability
Thousands of parts in stock — ready for immediate dispatch from Florida.
Payment Flexibility
AMEX, Visa, MasterCard, PayPal, Discover and wire transfer accepted.
SIEMENS 3SK1121-1CB42
Overview
This is a genuine Siemens component. PalmPartsSolution stocks it in new, refurbished, and surplus condition with tested warranty and same-day shipping on in-stock units.
Whether you are sourcing a like-for-like replacement for an existing installation, an emergency spare to keep a line running, or a qualified part for a new build, our team can confirm availability, revision, and lead time before you order.
Key Features
- Genuine Siemens catalog part
- Tested before shipment
- Backed by PalmPartsSolution warranty
- Cross-reference and revision assistance available
- Compatible with the broader Siemens automation ecosystem
Compatibility
When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Siemens equipment. Where applicable, confirm:
- Input/output voltage and current rating
- Communication protocol and network role
- Mounting form factor and footprint
- Operating temperature, humidity, and IP rating
- Required certifications (UL, CE, ATEX, marine, etc.)
Not sure which revision you need? Send us the catalog number on the nameplate and we will confirm the correct match.
Replacement Information
Three ways to source this part through PalmPartsSolution:
- Exact replacement — same Siemens catalog number, new or refurbished, tested and warrantied
- Form-fit-function equivalent — alternate revision or build that drops in without code changes
- Engineered migration — current-generation Siemens platform with documented conversion notes
Contact our engineering team if you need help choosing between these tracks.
Technical Specifications
The SIEMENS 3SK1121-1CB42 safety relay module features technical specifications that highlight its suitability for various industrial applications:
- Product Type: Safety relay module
- Series: SIRIUS 3SK1
- Voltage Rating: Optimized for typical industrial operating voltages (refer to SIEMENS data sheets for precise details).
- Mounting Type: DIN rail installation for universal compatibility and straightforward integration.
- Safety Standards: Meets relevant international safety standards (e.g., IEC 61508, EN ISO 13849-1), confirming a high safety integrity level.
- Function: Management and supervision of safety circuits.
Applications
- Industrial Automation and Machine Safety: A vital component for protecting complex industrial machinery and ensuring operator safety.
- Emergency Stop Systems: Delivers dependable and immediate shutdown features crucial for accident prevention.
- Process Control Environments: Integrated into control systems to maintain safety compliance and avert hazardous conditions in various manufacturing sectors.
- Conveyor Systems and Material Handling: Assures safe functioning of material transport systems by overseeing safety gates, emergency stops, and other protective devices.
- Robotics and Automated Assembly Lines: Essential for defining secure operational zones around robotic workstations and automated assembly units.
- Packaging and Food Processing Industries: Utilized to implement safety functions in equipment handling food and packaging materials, adhering to stringent industry guidelines.
Why Choose the 3SK1121-1CB42?
Unwavering Safety Assurance
The SIEMENS 3SK1121-1CB42 provides consistent and dependable safety monitoring, substantially lowering the risk of machinery-related incidents.
Trusted Brand Quality
Benefit from the superior engineering and production excellence associated with the SIEMENS brand, a global leader in industrial automation.
Effortless Integration
Its standard design and extensive compatibility features enable quick and simple integration into existing systems, minimizing downtime.
Availability & Shipping
- ▸In stock: 3SK1121-1CB42 ready for immediate dispatch from our Florida warehouse.
- ▸Free USA shipping: FedEx Priority (2–5 business days) and UPS Ground (3–5 business days). Expedited options available at checkout.
- ▸Worldwide delivery: FedEx International Priority (1–5 days), UPS International Priority (3–5 days), and USPS International (5–10 days) — rates calculated at checkout.
- ▸Bulk pricing: Volume discounts on request — contact our sales team for quantity quotes.
- ▸Buy with confidence: Every 3SK1121-1CB42 ships with a 1-Year PALM Parts warranty and a 30-day return window.
Frequently Asked Questions — Siemens
Machine down? We ship parts the same day.
New, surplus, and refurbished Siemens inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.
Related Siemens resources
What Verified Buyers Say
No reviews yet for this product. Be the first verified buyer to share your experience — we email a review invitation after every purchase.
Independent Supplier Notice
PALM Parts Solution operates as an independent industrial automation supplier and is not an authorized distributor or affiliate of any listed manufacturer or brand name. Manufacturer trademarks and product names are used solely for identification purposes. Original manufacturer warranties do not apply. All products sold by PALM Parts are backed by our own 1-year warranty.
Product Condition & Firmware
All products are sold as new unless stated otherwise. Original manufacturer packaging may show signs of handling, storage, or shelf wear. Date codes and series may vary from current factory production. PALM Parts does not guarantee the presence, version, or compatibility of any firmware on PLC or automation products.