👉 Relais is a type of communication system or device in which two or more devices are interconnected and communicate with each other through signals. It is typically used for controlling different systems or processes within an organization, such as security systems, HVAC systems, or industrial machinery. In the context of relais, one can think of it as a simple but effective way to control multiple devices or systems in a single system. The relais device consists of a central hub that acts as a communication center and receives signals
