Denyuan
![Denyuan Denyuan](https://y138.hongcdn.com/uploads/2403/34523758423542354245-jidianqi.jpg)
The relay is an electric switch. It consists of a group of input terminals for single or multiple control signals and a group of operating contact terminals. A switch may have any number of contacts in a variety of contact forms, such as on contacts, off contacts, or combinations thereof.