What is Programable Logic Controller (PLC)?

PLC stands for “programmable logic controller”.  It is a specialized computer system used in industrial automation and control system to monitor and control machinery and processes.

PLCs are designed to receive input signals from sensors and switches, process this input suing program or logic developed by PLC programmer, and then produce output signals to control devices, such as motors, valves, and relays, to perform specific tasks or processes.

What is PLC
Programmable Logic Controller

PLCs are commonly used in industries, manufacturing plants, factories, and other industrial settings to automate various tasks and processes. 

Types of PLC

Programmable Logic Controller (PLC) comes with various types, each plcs is designed for specific tasks i.e. applications and industries. The main types of plc are:

1. Modular PLC:

The modular PLCs are built using individual modules that can be customized and assembled to meet specific requirements. It offers flexibility regarding input/output options and can expand and upgrade according to manufacturer requirements.

Modular PLCs are suitable for applications where scalability and customization are essential.

2. Compact PLC:

Compact PLCs are small in size and have a fixed number of input and output points. The Compact PLCs are used in applications where the requirements of I/O are not larger. It is designed in such a way that the size it takes limited space or where a smaller number of I/O points are sufficient.

3. Rack-Mountable PLCs:

These PLCs are designed to be mounted in standard equipment racks or cabinets. They are commonly used in industrial automation systems where space is a consideration. Rack-mountable PLCs can be modular or fixed configurations, depending on the model.

Applications of PLC

PLCs are useful in various applications depending on the specific program they are being used for. Here are some typical uses of PLCs.

  • Manufacturing Automation
  • Process Control
  • Traffic Control
  • Packaging and Material Handling
  • Elevator control
  • Transportation

Read detail about Programmable Logic Controller (PLCs), how does a PLCs works and more in this post: click here