Harmony Control. This current monitoring relay monitors a conductor for exceedance or undershoot of the set limit value (1.5-15 A). You can choose between exceedance, undershoot and overshoot and undershoot in window mode. An error memory is optionally available, which holds the error message until a reset. Two relay changeovers are available for reporting, which can be loaded up to 8 A. The mode of operation, the limit value, the switching hysteresis and a drop-out delay can be set. The settings are made using control elements on the front, which can be protected against changes under a transparent cover. With an illuminated scale arrow, the setting of the potentiometer can be seen very clearly even from a distance. The front-side diagnostic switch enables the output relays to be switched off to test the entire application. When the transparent cover is closed, the diagnostic switch is automatically reset. The wide-voltage power supply (24-240 VAC/DC) enables universal use. Two LEDs show the status. The overall width is 35 mm and it is mounted on the top hat rail. The cable connection is made via screw terminals.