Zelio controller This level relay monitors the level as a limit switch and can also be used to control fluid levels in a 2-point control during filling and emptying. For this, binary sensors or switches are connected (float switches, pressure switches etc.). For indication, two relay changers are present that can be loaded with up to 5 A. The type of connection of the sensors, the number of fill levels and the time delay of the relay outputs can be set. Settings are made via control elements on the front that can be protected against changes using a transparent cover. 3 LEDs indicate the status of the device The wide-voltage power supply (24-240 VAC/DC) enables a universal application. The cable is connected via screw terminals.This text is machine translated.