Discontinued product. The preferred successor is the 3UG5816-1AA40 network monitoring device. IO-Link 3X160-690V digital monitoring relay for 3-phase network voltage for IO-Link AC 50...60 Hz 3 x 160 to 690 V. Monitors phase sequence, phase failure, phase asymmetry, under- and over-voltage, hysteresis 1-20 V, network stabilization time, trigger delay time, 1 changeover contact, screw connection. The digitally adjustable SIRIUS 3UG4 network monitoring relay is designed to monitor phase sequence, failure, and asymmetry as well as under- and over-voltage, for example, in unstable networks or mobile installations such as air conditioning compressors, refrigerated containers, construction site compressors, or cranes. It can be used worldwide due to its wide voltage supply and international certifications. The relay can be variably set for over, under, or window monitoring. Delay times and RESET behavior are freely parameterizable. It requires less space in the control cabinet thanks to its narrow design. Reliable diagnostics are provided by displaying the actual value and type of network fault. All versions come with removable connection terminals. In addition to screw connection technology, the devices are also available with spring-loaded connections for quick, maintenance-free, and vibration-resistant installations. They are also available in various voltages, optionally with IO-Link or with automatic rotation direction correction. The comprehensive accessories, such as device identification labels, insertion tabs, and cover caps, are uniform for all relays. SIRIUS relays - a program for all applications.