Ultimate Guide to Buying Siemens PLCs: Top Distributors and Expert Tips

Key Takeaways

Top DistributorsRS Components, Automation24, Mouser, Allied Electronics, PlcCity
Product SpecificationsComprehensive details available at RS Components, Mouser, and Allied Electronics
PricingAffordable options at Automation24 and competitive pricing at PlcCity
Availability & ShippingSame-day shipping at RS Components, fast shipping at PlcCity
Customer SupportExtensive technical support at RS Components and Allied Electronics
Unique Selling PointsComparison charts at Automation24, detailed datasheets at Mouser, customer reviews and fast shipping at PlcCity
KeywordsSiemens PLC, industrial automation, product selection, technical support, datasheets, industrial control
Expert AdviceAssessing needs, future-proofing, utilizing customer reviews
Word CountApproximately 1600-2000 words for top-ranking articles


Siemens PLCs are the backbone of industrial automation, offering robust solutions for controlling and automating various industrial processes. At ControlNexus, established in 2013, we pride ourselves on being a leading provider of Siemens PLCs, HMIs, and Inverters. This guide aims to help you navigate the best places to buy Siemens PLCs and what to consider during your purchase.

Understanding Siemens PLCs

What is a Siemens PLC?

A Siemens Programmable Logic Controller (PLC) is a versatile device used in industrial automation to control machinery and processes. These controllers are renowned for their reliability, scalability, and extensive application range. Siemens PLCs come in various models, including the S7-200S7-300S7-400S7-1200, and S7-1500.

Key Features and Benefits

  • Reliability: Siemens PLCs are designed for long-term use in harsh industrial environments.
  • Scalability: These controllers can be easily expanded with additional modules to meet growing automation needs.
  • Versatility: Suitable for a wide range of applications, from simple control tasks to complex automation systems.
  • Ease of Use: Supported by user-friendly software like TIA Portal.

Top Distributors for Siemens PLCs

RS Components

RS Components is a well-respected distributor known for its extensive range of Siemens PLCs and other industrial automation products. They offer:

  • Comprehensive Product Listings: Detailed descriptions and technical specifications for each product.
  • Same-Day Shipping: Fast and reliable delivery options.
  • Technical Support: Expert advice and support for selecting the right products.

Visit their Siemens PLC section to explore their offerings.


Automation24 is favored for its affordable pricing and user-friendly interface. Key features include:

  • Simplified Comparison Charts: Easy-to-understand product comparisons to help you make informed decisions.
  • Clear Pricing: Transparent and competitive pricing on all Siemens PLCs.
  • Ease of Use: Streamlined purchasing process.

Check out their selection of Siemens PLCs on their website.


Mouser is known for providing detailed technical information and extensive documentation. Highlights include:

  • Datasheets and Technical Documents: Access to comprehensive datasheets and manuals.
  • Stock Availability: Up-to-date information on product availability.
  • In-Depth Product Specs: Detailed specifications to ensure you choose the right PLC for your needs.

Explore Mouser’s Siemens PLC offerings for more information.

Key Factors to Consider When Buying Siemens PLCs

Product Specifications

Understanding the technical specifications of Siemens PLCs is crucial. Here are some tips:

  • Compare Models: Look at different models and their specs, such as memory capacity, processing speed, and I/O capabilities.
  • Match Your Needs: Ensure the PLC meets the specific requirements of your project.

Pricing and Affordability

Finding the best price for Siemens PLCs involves considering both upfront costs and long-term value:

  • Affordable Options: Automation24 offers competitive prices.
  • Value for Money: Consider the total cost of ownership, including maintenance and potential upgrades.

Availability and Shipping

Product availability and shipping times can impact your project timelines:

  • Stock Availability: Ensure the distributor has the products in stock.
  • Shipping Options: Fast shipping options are available at RS Components and PlcCity.

Customer Support and Technical Assistance

Good customer support can make a significant difference in your purchasing experience:

  • Technical Support: Look for distributors like RS Components and Allied Electronics that offer extensive technical assistance.
  • Customer Reviews: Use reviews to gauge the quality of support and product reliability.

Expert Tips for Selecting the Right Siemens PLC

Assessing Your Needs

Determine the specific requirements of your project to select the most suitable Siemens PLC:

  • Project Requirements: Consider factors such as the number of I/O points, processing power, and communication protocols.
  • Future Expansion: Choose a PLC that can accommodate future growth and additional modules.


Selecting a PLC that offers scalability and flexibility can save time and costs in the long run:

  • Scalability: Ensure the PLC can be expanded with additional modules as your needs grow.
  • Flexibility: Look for controllers that support various communication protocols and integration options.

Utilizing Customer Reviews

Customer reviews can provide valuable insights into the performance and reliability of Siemens PLCs:

  • Positive Feedback: Look for consistent positive feedback on product reliability and customer support.
  • Negative Feedback: Pay attention to recurring issues mentioned in negative reviews and assess their relevance to your needs.

Comparison Chart of Siemens PLC Distributors

To help you make an informed decision, here’s a comparison chart highlighting key aspects of the top Siemens PLC distributors:

DistributorProduct RangePricingTechnical SupportShipping OptionsCustomer Reviews
RS ComponentsExtensiveCompetitiveComprehensiveSame-day shippingGenerally positive
Automation24ModerateAffordableLimitedStandard shippingMixed
MouserExtensiveCompetitiveExtensiveStandard shippingGenerally positive
Allied ElectronicsExtensiveCompetitiveComprehensiveStandard shippingGenerally positive
PlcCityModerateCompetitiveLimitedFast shippingGenerally positive


Choosing the right Siemens PLC is crucial for ensuring the efficiency and reliability of your industrial automation projects. By considering factors such as product specifications, pricing, availability, and customer support, you can make a well-informed decision. Top distributors like RS Components, Automation24, Mouser, Allied Electronics, and PlcCity offer a range of options to meet your needs.

At ControlNexus, we are committed to providing high-quality Siemens PLCs, HMIs, and inverters to help you achieve your automation goals. Visit our Siemens PLC section to explore our offerings and get expert advice on selecting the best products for your application.

Additional Resources

For further reading and to enhance your knowledge about Siemens PLCs, visit our blog where we regularly post articles, guides, and updates on the latest trends in industrial automation.

Contact Information

For any inquiries or technical support, please reach out to our team through our contact page. We are here to assist you in finding the best Siemens PLC solutions for your needs.

Thank you for choosing ControlNexus as your trusted partner in industrial automation. We look forward to helping you achieve success with our top-quality Siemens products and exceptional customer service.


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