Programmable Logic Controllers and Programmable Relays
PLCs, or Programmable Logic Controllers are digital computers that are used to control industrial processes and machines. They are commonly used in manufacturing, automation, and other industrial applications. A PLC consists of a processor, memory, and input/output (I/O) modules. The processor executes a program that is stored in memory and communicates with the I/O modules to control devices such as motors, sensors, and valves. Programmable relays, also known as smart relays, are similar to PLCs but have a smaller memory and processing power. They are typically used in smaller-scale applications such as building automation and home automation. Programmable relays can perform simple logic functions and control devices such as lights, fans, and alarms.