Monitoring Relays for speed monitoring

The 3UG4651 monitoring relays monitor the target speed of motors, shafts or driven wheels for exceedance and shortfall. Based on periodic continuous measuring, they monitor the pulses delivered per rotation by the attached sensors. Furthermore, the relays are suitable for all functions requiring the monitoring of a continuous pulse signal, e.g. belt operation and scan time monitoring or bypass control. Furthermore, 3UG4851 monitoring relays are available with IO-Link connection.


Advantages at a glance

  • Global applicability thanks to wide voltage range from 24 to 240 V AC

  • Variably adjustable to exceedance, shortfall or window monitoring

  • Freely parameterizable delay times and reset behavior

  • Permanent display of actual value or fault type

  • Use of up to 10 sensors per rotation with extremely slowly rotating motors

  • Connection option for 2- or 3-conductor sensors and sensors with mechanical switching or electronic output

  • Integrated auxiliary voltage for sensor

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