Phoenix Contact 2903659 This device is a type of industrial relay that can be easily connected to a circuit. It features power contacts, allowing it to control the flow of electricity, as well as two changeover contacts that can switch between different states. The device also has a test button for troubleshooting and a status LED that indicates its operational state. In addition, it incorporates a freewheeling diode and a mechanical switching position indicator, providing an easy way to monitor its state. The plug-in design allows for simple installation, while the input voltage is 12 V DC, making it suitable for various industrial applications.