Digital monitoring relay for speed monitoring from 0.1 to 2200 RPM for over- and under-speed detection. It is suitable for AC/DC from 24 to 240 V and AC from 50 to 60 Hz. The start-up delay ranges from 1 to 900 seconds, the triggering delay from 0.1 to 99.9 seconds, and the hysteresis ranges from 0.1 to 99 RPM. The device features a changeover relay with or without a fault memory and utilizes spring-loaded technology.

The digitally adjustable speed monitoring relay SIRIUS 3UG4 monitors speeds for over- and under-speed conditions, for example, in the case of slip or breakage of a belt drive, and is also suitable for slow-running motors. It allows for global use due to its wide voltage supply and international certifications. Quick commissioning is facilitated by menu-guided parameterization and real-time value display for limit value determination.

The device permanently displays the actual value or type of error. 2- or 3-wire sensors, as well as sensors with mechanical switch or electronic output, can be connected. An auxiliary voltage for the sensor is integrated. Device replacement is possible without rewiring thanks to removable terminals. Reliable system diagnostics are ensured through clear error messages on the display and an optional fault memory.

In addition to screw connection technology, the devices are also available with spring-loaded connections for quick, maintenance-free, and vibration-resistant connections. They are optionally available with IO-Link. The comprehensive accessories, such as device identification labels, insertion tabs, and cover caps, are uniform for all relays. SIRIUS relays - a program for all cases.