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PLC stands for Programmable Logic Controller. It is a digital computer-based control system commonly used in industrial automation to monitor and control machinery or processes. A PLC is designed to withstand harsh industrial environments and is typically used to automate tasks that require precision, reliability, and flexibility. It consists of a programmable microprocessor, input and output modules, and various communication interfaces.

### How do PLCs (Programmable Logic Controllers) work?

PLCs (Programmable Logic Controllers) work by executing a program or set of instructions to control and automate industrial processes.

- Input Acquisition
- Program Execution
- Program Logic
- Decision Making
- Output Control
- Communication
- Monitoring and Diagnostics

### **What are the benefits of PLCs (Programmable Logic Controllers)?**
- **Flexibility:** Provide a high degree of flexibility in terms of programming and reprogramming. They allow for easy modification and adaptation of control logic to accommodate changes in the process or system requirements without requiring hardware modifications.
- **Reliability:** Designed for reliable operation in harsh industrial environments. They are built to withstand extreme temperatures, vibration, electrical noise, and other challenging conditions. PLCs are known for their robustness and durability.
- **Real-time Operation:** Offer real-time control, enabling precise and timely response to inputs and events. This is crucial in applications that require fast and accurate control, such as high-speed manufacturing processes or critical safety systems.
- **Diagnostics and Troubleshooting:** PLCs provide built-in diagnostics and monitoring capabilities, allowing operators to detect faults, analyse performance, and troubleshoot issues quickly. This facilitates maintenance and minimizes downtime.
- **Safety Features:** Many PLCs offer safety-oriented functionality, including specialized programming languages and certified safety modules. Safety PLCs ensure compliance with industry safety standards and provide features such as safety interlocks, emergency stop functions, and fault detection.
- **Remote Access and Monitoring:** PLCs with network connectivity allow for remote access and monitoring, enabling operators to control and monitor processes from a central location or through secure remote connections. This enhances operational efficiency and facilitates remote troubleshooting.

### **What applications use** **PLCs (Programmable Logic Controllers)?**
- Manufacturing
- Power Generation and Distribution
- Chemical and Petrochemical Industry
- Water and Wastewater Treatment
- Food and Beverage Industry
- Automotive Industry
- Pharmaceutical Industry
- Packaging and Material Handling
- Oil and Gas Industry

More information can be found in our [PLCs guide](https://uk.rs-online.com/web/content/discovery/ideas-and-advice/plcs-programmable-logic-controllers-guide).



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PLCs - Programmable Logic Controllers

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What is a PLC?A Programme Logic Controller (PLC) is a digital industrial computer used to monitor input, output, and robotic devices as well as monitoring automatic processes whilst making decisions of the control of output items. A PLC is used to ensure that fault diagnosis, reliability and programming is up to standards. A PLC reacts to a programming software to give the desired output and they can be enhanced by adding DIN Rails, and HMI Displays. Please look at our PLC Accessories selection!Part of a Programme Logic Controller is formed by a Central Processing Unit (CPU) which circulates electricity within the computer, it is made up of a microprocessor system and programme basic numerical, logical operations.PLCs have various applications used across many different industries and are included in the machinery used in Lifts and Escalators, Heating Systems, Medical devices, traffic light controls and many more. Please browse our Phoenix Contact Programme Logic Controllers featuring Hard PLCs, Soft PLCs, Modular PLCs, Unitary PLCs, Slot PLCs and Company PLCs- available for next day delivery!

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Allen Bradley Programmable Logic Controllers are used where reliability control, simple programming and fault diagnosis is necessary. PLC controllers are incredibly useful and have many applications across several industries such as manufacturing, food & beverage, and building control. PLC Controller's respond to inputs from programming software and give a desired output, meaning they are versatile and integral to customising your processes.Allen Bradley are well know in many industries for their machine safety range of products, and are mainstay in automation and control applications. From every aspect of machine processes, Allen Bradley provide safe, reliable components that put the safety of the operator first. Efficiency and safety are at the heart of Allen Bradleys offer, with high quality and reliable parts to suit the most demanding industries. Allen Bradley combine with RS Components customer first attitude to get you the parts you need in the timeframe you need them. For a service you can trust.

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Schneider Electric Programmable Logic Controllers (PLCs) are sophisticated control devices widely used in industrial automation and process control. These versatile electronic devices are designed to monitor and control machinery and processes with precision, speed, and reliability.<h2>Features of Schneider Electric PLCs:</h2><ul><li>Modularity: Schneider Electric offers modular PLCs that can be customized to suit specific application requirements.</li><li>Wide Range: PLCs are available in a wide range of sizes and capabilities to accommodate various automation needs.</li><li>Programming Flexibility: They support various programming languages, including ladder logic and structured text, allowing for versatile control strategies.</li><li>Real-time Operation: PLCs provide real-time control, ensuring precise execution of tasks.</li><li>Connectivity: They offer multiple communication options, facilitating integration with other industrial systems.</li><li>Remote Monitoring: Some models support remote monitoring and troubleshooting, enhancing maintenance efficiency.</li><li>Diagnostics: Built-in diagnostic tools aid in identifying and resolving issues quickly.</li></ul><h2>What are the benefits of Schneider Electric PLCs?</h2><ol><li>Precision Control: Schneider Electric PLCs enable precise control of industrial processes, resulting in improved product quality and consistency.</li><li>Reliability: These PLCs are known for their high reliability, reducing downtime and costly production interruptions.</li><li>Scalability: Modular designs support scalability, making them suitable for small machines or complex industrial systems.</li><li>Energy Efficiency: PLCs can optimize energy usage, reducing operational costs and environmental impact.</li><li>Data Integration: They facilitate data collection and integration, enabling better decision-making and predictive maintenance.</li><li>Safety: Schneider Electric PLCs can be integrated with safety systems to ensure compliance with industry safety standards.</li></ol>

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Schneider Electric Distribution Boards, also known as electrical panels or distribution panels, are essential components in electrical systems. They serve as centralized enclosures for distributing electrical power to various circuits within residential, commercial, and industrial buildings. These boards ensure safe and organized electrical distribution while offering a range of features and benefits.<h2>Features of Schneider Electric Distribution Boards:</h2><ul><li>Multiple Circuits: Distribution boards are equipped with multiple circuit breakers or fuses to control power distribution to different areas or devices.</li><li>Circuit Protection: Built-in protection mechanisms like circuit breakers and fuses safeguard against overloads and short circuits.</li><li>Modularity: Some models feature modular designs for easy customization and expansion as electrical needs change.</li><li>Labeling: Clear labeling of circuits and components for easy identification and maintenance.</li><li>Safety Features: Schneider Electric boards adhere to safety standards, including fire-resistant enclosures and IP-rated protection against dust and moisture.</li><li>Remote Monitoring: Advanced models support remote monitoring for real-time status and fault detection.</li><li>Compatibility: Suitable for various applications, from residential homes to complex industrial facilities.</li><li>Efficient Cable Management: Designed to accommodate organized cable routing and management.</li></ul><h2>What are the benefits of Schneider Electric Distribution Boards?</h2><ol><li>Safety: Distribution boards enhance electrical safety by protecting against overcurrent and short-circuit hazards.</li><li>Organization: They centralize electrical distribution, making it easier to manage and troubleshoot electrical circuits.</li><li>Customization: Modular designs allow for tailored solutions to specific electrical requirements, reducing excess capacity.</li><li>Efficiency: Properly distributed power ensures efficient electrical supply to all devices and areas.</li><li>Reliability: Schneider Electric boards are known for their reliability, minimizing downtime and disruptions.</li><li>Cost Savings: Preventing electrical faults and streamlining maintenance efforts result in cost savings.</li><li>Scalability: Can be expanded or modified as the building's electrical needs evolve.</li><li>Compliance: Schneider Electric Distribution Boards comply with industry standards and regulations for safety and performance.</li></ol>

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Siemens SIMATIC S7-300 PLCs SIMATIC S7-300 Programmable Logic Controllers (PLCs) are a reliable, high-performance solution for industrial automation. They are designed to offer flexibility, modularity, and scalability to meet the diverse automation needs of various industries. S7-300 PLCs provide an effective way to automate processes in a cost-effective and efficient manner. Learn more about the full Siemens SIMATIC range in our comprehensive guide <a href="https://uk.rs-online.com/web/content/discovery/ideas-and-advice/siemens-simatic-guide">here.</a>Key Features and Benefits: <ul><li>High-performance processor for fast and precise control</li> <li>Modular design allows for easy customization and scalability</li> <li>Flexible communication interfaces for seamless integration with other systems</li><li>Extensive range of modules for various functions such as analog inputs/outputs, digital inputs/outputs, and more</li> <li>Built-in diagnostic functions for easy troubleshooting and maintenance</li> <li>Intuitive programming software for efficient programming and easy system setup</li></ul> What is a SIMATIC S7-300 PLC? A Siemens SIMATIC S7-300 PLC is an industrial automation device that is designed to control and automate manufacturing processes. It is a modular PLC that provides flexibility and scalability to meet the diverse automation needs of various industries. Known for its high-performance processing and response times, the S7300 provides support for multiple communication protocols, and robustness in harsh industrial environments. It is programmed using STEP 7 software and supports several programming languages, including Ladder Logic, Function Block Diagram (FBD), and Structured Text (ST).Applications Siemens SIMATIC S7-300 PLCs are suitable for various applications, including manufacturing and production, process control, water and wastewater treatment, building automation, and energy management.

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Thinking about purchasing a high performance Siemens SIMATIC S7-1500 PLC? Look no further. At RS, we offer a comprehensive selection of controllers and accessories for the Siemens S7-1500. The S7-1500 is a high performance and versatile programmable logic controller (PLC), designed to optimise your automation processes and drive productivity to new heights. This controller features a modular design with integrated safety features and advanced diagnostics, suitable for more complex applications. What are the advantages of SIMATIC S7-1500 PLCs?<ul> <li>Performance: S7-1500 PLCs have powerful processors that enable fast execution of complex control programs and real-time processes, making them suitable for demanding and high-speed applications.</li> <li>Scalability: The modular design of the S7-1500 means you can easily configure and expand the system according to your needs.</li> <li>Safety: Integrated safety functions reduce hardware complexity and ensure safe and efficient operation.</li> <li>Advanced Diagnostics: S7-1500 PLCs simplify troubleshooting and maintenance tasks, helping to reduce downtime and enhance system availability.</li> <li>Communication Options: S7-1500 PLCs support various communication protocols, including PROFINET and PROFIBUS, ensuring seamless integration and data exchange within industrial networks.</li> <li>High-Level Programming Languages: These PLCs support multiple programming languages, including ladder logic, structured text (ST), and function block diagram (FBD), enabling efficient and flexible code development.</li> <li>Efficient Engineering: S7-1500 PLCs integrate seamlessly with Siemens' TIA Portal (Totally Integrated Automation) engineering framework, streamlining project development and reducing engineering efforts.</li> <li>Reliability and Longevity: Built with robust components and design, S7-1500 PLCs offer long operational lifespans, ensuring consistent performance and reduced maintenance requirements.</li> </ul>What's the difference between the S7-1500 and S7-1200? Siemens S7-1500 and S7-1200 are both part of the SIMATIC S7 family of programmable logic controllers (PLCs), but they target different levels of automation and offer varying levels of performance and features. The S7-1500 series is a more powerful PLC that provides greater scalability and modularity. It offers an extensive range of digital and analog I/O modules, meaning you can expand the system as your automation needs grow. Why Choose Siemens PLCs?Siemens PLCs are expertly designed, rigorously tested, and approved for the specific requirements of electrical engineers and system integrators. Engineered for reliability, Siemens PLCs provide versatility, safety, and durability, ensuring optimal performance throughout their operational lifespan. Find out more about the full Siemens SIMATIC range in our hekpful guide<a href="https://uk.rs-online.com/web/content/discovery/ideas-and-advice/siemens-simatic-guide"> here.</a>

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Looking to buy a Siemens SIMATIC S7-1200 PLC? RS is your trusted Siemens PLC distributor. The S7-1200 programmable logic controller (PLC) combines power and reliability for your industrial automation needs. This modular, compact and versatile controller is engineered with cutting-edge features and a user-friendly interface.What are SIMATIC S7-1200 PLCs used for?Siemens S7-1200 PLCs can be used across various industrial automation and control applications. They are designed to monitor and control processes, machinery, and equipment in industries such as manufacturing, automotive, energy, food and beverage, and more. S7-1200 PLCs can be used to monitor and control various types of processes and machinery, which helps to improve efficiency and maintain output quality. You can find out more about the full Siemens SIMATIC range in our complete guide <a href="https://uk.rs-online.com/web/content/discovery/ideas-and-advice/siemens-simatic-guide">here.</a> What S7-1200 accessories and parts are available?At RS, we stock Siemens S7-1200 starter kits, which include everything you need to get started with an industrial automation project. Alternatively, you can find these components available separately, enabling you to customise your PLC. The parts that typically go with a Siemens S7-1200 PLC can vary based on the specific application and the requirements of the automation system. However, here's a list of common components that are often used alongside an S7-1200 PLC to create a functional industrial automation setup:<ul> <li>Power Supply Unit: Provides the necessary electrical power to the S7-1200 PLC and other connected devices.</li> <li>Input/Output Modules (I/O Modules): These modules allow the PLC to interface with sensors, switches, buttons, and other input devices, as well as control actuators, motors, solenoids, and other output devices.</li> <li>Communication Modules: These modules enable communication between the PLC and other devices, networks, or systems. This can include modules for Ethernet communication, serial communication, and other protocols.</li> <li>HMI (Human-Machine Interface) Display: A HMI display allows operators to interact with the PLC and the automation system. It can include touchscreens, buttons, indicators, and graphical interfaces.</li> <li>Programming Software: Software tools like Siemens' TIA Portal (Totally Integrated Automation Portal) are used to program, configure, and monitor the S7-1200 PLC.</li> <li>Communication Cables: Cables are necessary for connecting the PLC to other devices, such as a computer for programming or monitoring purposes.</li> <li>Sensors and Actuators: These are the devices that the PLC interacts with to control the physical processes. Sensors provide input data, while actuators execute commands based on the PLC's instructions.</li> <li>Terminal Blocks and Wiring: These are used to connect the PLC to the various input and output devices, as well as the power supply.</li> <li>Mounting Accessories: Components for securely mounting the PLC and modules onto a panel or other surfaces.</li> <li>Enclosures: Enclosures provide protection for the PLC and its components from environmental factors such as dust, moisture, and temperature variations.</li> <li>Power Distribution Components: Components like circuit breakers, fuses, and relays ensure safe power distribution and protection for the PLC and connected devices.</li> <li>Networking Hardware: If the PLC is part of a larger networked system, networking hardware such as switches and routers may be required.</li> <li>Backup and Data Storage Devices: Devices like SD cards or USB drives might be used to store backups of PLC programs and data.</li> </ul>

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Looking for Siemens SIMATIC S7-400 PLCs? Discover our comprehensive range here. Engineered for maximum flexibility, Siemens S7-400 controllers are high-performance control solutions in large and intricate automation scenarios.The extensive range of modules available for the S7-400 allows for meticulous customisation, catering to the unique requirements of diverse applications. Its compatibility with existing installations makes it a versatile choice for businesses seeking to upgrade their automation infrastructure without compromising on reliability.Embracing reliability as its cornerstone, the S7-400 PLC boasts robustness in design, mitigating the risks of system failures and downtime. Its prowess in managing demanding tasks and providing extensive input/output capacities positions it as the go-to solution for industries where precision and consistency are paramount. Discover more about the full Siemens SIMATIC range in our complete guide <a href="https://uk.rs-online.com/web/content/discovery/ideas-and-advice/siemens-simatic-guide">here.</a>

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Looking for Siemens PLCs? At RS, we offer a wide range of top industry PLCs from Siemens. PLCs, which you may know as Programmable Logic Controllers, are industrial digital computers that have been designed for the control and automation of manufacturing processes or robotic devices.Siemens PLC's are used where reliability control, simple programming and fault diagnosis are needed. A CPU (Central Processing Unit) forms part of the PLC system. PLC CPUs are a microprocessor-based control system that act as the electronic circuitry within an industrial computer. They are usually built-in carry out instructions from the computer program via programming languages, performing basic mathematical, logical, control, input and output operations.You'll need a PLC for applications such as traffic light controls, packaging machines, lifts and escalators, heating control systems and pretty much any kind of automating system that has been installed within an industrial or commercial environment.Choose from our range of Siemens PLC's, Siemens is a global leading brand that is a focused technology company, they create technology that empowers customers to positively transform industries. From more resource-efficient factories, resilient supply chains, and smarter buildings and grids, to cleaner and more comfortable transportation as well as advanced healthcare, Siemens creates technology with purpose, adding real value for customers. You can find out more about Siemens SIMATIC PLCs and accessories in our helpful <a href="https://uk.rs-online.com/web/content/discovery/ideas-and-advice/siemens-simatic-guide">guide here.</a>

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Programmable logic controllers (PLCs) are computer-based systems used to automatically control processes or machinery.<h2>Where Will I Find PLC Control?</h2>PLC systems are commonly found in the following industries:<ul><li>Manufacturing</li><li>Power generation</li><li>Water treatment</li><li>Automotive</li></ul>Away from industrial applications, you will also find them throughout your daily life controlling things like lifts, traffic lights and heating systems.Simply put, a PLC electrical controller will look for a certain input and then perform an output based on meeting those criteria. For example, it might count the number of items manufactured by a piece of machinery and halt production when the desired number is met.<h2>Omron PLC Programmable Logic Controllers</h2>As part of an everchanging technical landscape for nearly 100 years, OMRON know the importance of being flexible. They also understand the hard work it takes to keep your systems running 24/7, 365 days a year. In the same way, PLCs are known for being robust and hardwearing, but are amongst some of the most flexible components available.They are also loaded with diagnostic and safety features and can be set to trigger emergency stops or highlight potential hazards. Likewise, OMRON understand that knowing how a system is working is paramount to the safe, efficient running of your business.OMRON offer several PLCs suitable for different uses and applications. Each is available in a choice of configurations.OMRON CP2E PLC ControllersThis compact controller offers exceptional performance for standalone machines. It also is ideal where traceability and monitoring are key. The standard (S-Type) model features axis control, while the N-type version includes Ethernet connectivity.OMRON CP1L PLC Programming ControllersWith the compactness of a micro-PLC, but the power and capabilities of a modular PLC this is a perfect choice when space is tight.

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WAGO PLCs - Programmable Logic Controllers| RS

PLC stands for Programmable Logic Controller. It is a digital computer-based control system commonly used in industrial automation to monitor and control machinery or processes. WAGO PLCs are renowned for their reliable design to withstand harsh industrial environments and are typically used to automate tasks that require precision and flexibility. It consists of a programmable microprocessor, input and output modules, and various communication interfaces.<h2>What can WAGO PLCs offer for you?</h2><ul><li>Flexibility: WAGO PLCs let you control logic without any hardware headaches.</li><li>Reliability: Built to withstand the wild side of industrial environments, WAGO PLCs are the tough guys in the band.</li><li>Real-time: Perfect for industries that need a beat as sharp as a high-speed drumroll.</li><li>Diagnostics and Troubleshooting: Got an issue? WAGO PLCs are like tech support, finding and fixing glitches in record time.</li><li>Safety Features: They come with safety features such as emergency stops, safety interlocks—you name it.</li><li>Remote Access: WAGO PLCs with network magic let you control and troubleshoot from your comfy central spot.</li></ul><h3>Uses of WAGO PLCs:</h3>Making production smooth and efficient, here are some of the industries that use their products the most:<ul><li>Manufacturing</li><li>Power Plants</li><li>Chemical and Petrochemical</li><li>Water and Wastewater Treatment</li><li>Food and Beverage</li><li>Automotive</li><li>Pharmaceutical</li><li>Packaging</li><li>Oil and Gas</li></ul>And if you're curious for more, check out the <a href="https://uk.rs-online.com/web/c/automation-control-gear/plcs-hmis-industrial-computing/plcs-programmable-logic-controllers/?applied-dimensions=4294964477">WAGO PLCs guide</a>.

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