Crouzet Speed Monitoring Relay, SP-NO/NC, DIN Rail

The HSV relay controls the speed (or, more strictly speaking, the operating rate, or frequency) of a process (moving walkway, conveyor) using discrete sensors. It can be used to monitor under OR overspeed.

Control of overspeed, underspeed, operating rate, stopping
Measurement via discrete sensors - 3-wire PNP or NPN, Namur, voltage 0-30V or volt-free contact type
Works with either NO or NC sensors
Time between pulses adjustable from 0.05 s to 10 min.
Power-on inhibit time, adjustable from 0.6 s to 60 s
Inhibit time can be managed via an external contact