I/O Relay ModulesI/O relay modules are electronic devices that are used to control and monitor the input and output (I/O) signals of a system or device. These modules are typically used in industrial and commercial applications, and are designed to provide a convenient and reliable way to interface with a wide range of I/O signals. I/O relay modules typically consist of a number of individual relays, each of which is capable of switching a specific I/O signal on or off. The modules also often include built-in diagnostic and control functions, such as LED indicators and push-button controls, to make them easy to use and troubleshoot. I/O relay modules are an essential component of many automated systems, and are used in a wide range of industries, including manufacturing, transportation, and building automation.