We discussed the top 20 PLC brands here. Now we’re going to take a deep dive into the top PLC brands in 2021.


Siemens arguably is the most popular brand in automation and PLC. In fact, the company and its subsidiaries employ more than 385,000 around the world.


Here are several professions that use Siemens:

  • Building Technologies
  • Energy Management
  • Financial Services
  • Health Management
  • Mobility
  • Power and Gas
  • Power Generation Services
  • Process Industries

Notable Features

One of Siemens’ most notable features is their Siemens SIMATIC line of controllers. This provides users of all performance needs an option.

  • Ethernet TCP/IP Connections
  • Profinet IO Communications
  • Profibus Adaptive
  • Configure, program, test, and diagnose the controller process


Allen-Bradley is the line of controllers from Rockwell Automation. They are one of the biggest manufacturers of controllers in the US.


Allen-Bradley’s line of controllers are used in a lot of different industries. Here are some they’re used in:

  • Aerospace
  • Automotive
  • Cement
  • Chemical
  • Entertainment
  • Fibers & Textile
  • Food & Beverage
  • Household & Personal Care
  • Infrastructure
  • Life Sciences
  • Marine
  • Metals
  • Mining
  • Oil & Gas
  • Power Generation
  • Print & Publishing
  • Pulp & Paper
  • Semiconductor
  • Water Wastewater

Notable Features

Allen-Bradley boasts some notable features that make it a popular PLC choice. Here are some:

  • Large control systems designed for complete automation projects
  • Application specific configurations of industrial automation technology
  • Specific solutions based on industries


ABB has been a Fortune 500 staple for more than 20 years. They offer a complete portfolio of industrial technology products. Because of this, they’re one of the top PLC brands available today.


ABB is used in the following industries:

  • Automative
  • Infrastructure
  • Utilities
  • Transportation
  • Chemical Solutions
  • Life Sciences
  • Food and Beverage

Notable Features

ABB is known for its concept of any module in any CPU. In other words, you can use any ABB AC500 module regardless of what CPU you have for your AC500 PLC. This makes replacing parts an easy and pain-free process. There are some other notable features too:

  • Customizable systems
  • Unlimited input/output cards
  • Lifecycle Management on all products

B & R Industrial Automation

B & R Industrial Automation offers customers a complete automation solution that provides maximum flexibility and economic efficiency. It was acquired by ABB in 2017.


B & R Industrial Automation is featured in several industries:

  • Automotive
  • Additive Manufacturing
  • Printing
  • Energy
  • Semiconductors/Electronics
  • Plastics
  • Maritime & Offshore
  • Metalworking
  • Medical Device Assembly
  • Mobile Automation
  • Food & Beverage
  • Oil and Gas
  • Textiles
  • Packaging
  • Environmental and Recycling

Notable Features

Some notable features of B & R Industrial Automation include:

  • Scalable complete solutions
  • mapp Technology for easier user management system, alarm system, or motion control sequence
  • Ready-made components
  • Open standards and bidirectional interfaces
  • Versatile programming in IEC 61131-3, C, C++ and CFC languages


Emerson US is a leader in automation solutions and commercial & residential solutions to make the world healthier, safer, smarter and more sustainable.


  • Automotive
  • Industrial Energy and Onsite Engineering
  • Utilities
  • OEM/Engineered Solutions Providers
  • Power
  • Chemical
  • Life Sciences
  • Oil & Gas
  • Pulp & Paper
  • Downstream Hydrocarbons
  • Mining, Minerals & Metals Packaging
  • Water/Wastewater
  • Food & Beverage
  • Marine

Notable Features

There are several key features of Emerson products:

  • Better performance and productivity through PROFINET
  • Interoperable with most open industry standards
  • Increased durability through rugged, fanless design
  • A range of products including large, compact, micro, and safety controllers

If you want to find top controls engineer talent, reach out to Applied Resource Group. As Atlanta’s top staffing firm, we deliver high-performing controls engineers who are knowledgeable in these top PLC brands in 2021.