MR-DIO-1 is an industrial-grade digital input/output module developed by Phoenix Contact. It is a freely programmable input/output module for industrial automation, measuring, and control applications. The module offers up to 8 inputs and outputs in a robust and compact form factor. It is equipped with digital inputs that can be used to detect a wide range of input signals, such as mechanical switches, thermocouples, pressure switches, and proximity sensors. Each input is protected using a combination of Flyback diodes, RC networks, and built-in circuit breakers. The module also features a rear-panel connector, allowing for connection to external devices and controllers. The module is designed to provide reliable performance in extreme environments and features a configurable output-switching frequency, making it suitable for controlling the speed of motors and other types of machinery. Furthermore, it is available with a range of communication protocols, including RS485 and IO-Link, allowing for integration into a wide range of automation systems.