Introduction
In modern industrial automation, Programmable Logic Controllers (PLCs) play a vital role in controlling machinery and processes with high precision and efficiency. One of the most important components of a PLC system is the PLC control relay. These relays are integral to the PLC’s functionality as they allow it to interface with the physical world—controlling devices such as motors, lights, solenoids, and other electrical equipment. This article will explore the concept of PLC control relays, their types, working principles, applications, and advantages in automation systems. What is a PLC Control Relay?