The USB interface USB/S 1.12 is a KNX rail-mounted device (REG) designed for installation in a distribution board on a 35 mm mounting rail. The USB interface enables communication between the ETS and a KNX system (programming, bus monitoring, group monitoring). Visualizations or other clients can also access KNX via USB. The device connects to the computer using a Type B USB cable and is ready for use as soon as the USB is connected. The necessary driver is automatically installed under Windows upon the first connection. The operating status and telegram traffic are indicated by 3 LEDs. The KNX part and the USB part are galvanically isolated from each other.