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  1. Products
  2. Condition monitoring
  3. Pulse evaluation
  4. Safe monitoring of underspeed

Safe monitoring of underspeed

  • For the safe detection of underspeed
  • Easy setting of the preset value via rotary switch
  • Very large adjustable speed range
  • Clearly visible LEDs for indicating operation, release, error and switching status
  • Monitoring of two input channels with one separate output relay each

Safe monitoring of underspeed


Safe monitoring of underspeed

The speed monitor of the DU series has been developed for safety-related minimum speed monitoring. It receives the pulses from the sensors connected on the inputs as pulse pick-ups and calculates the frequency. By continuously comparing the input frequency (actual value) and the switch point (preset value), the unit promptly detects underspeed.
The minimum speed is easily set via rotary switches.
In addition to the safety relays, transistor outputs are available for status and error indication.
The monitors are widely used on fans of industrial furnaces or paint shops in the automotive industry.