Siemens 3UG4 - Page 311

3UG4651 speed monitoring relay
12.3 Functions
3UG4 / 3RR2 monitoring relays
Manual, 05/2016, NEB927043002000/RS-AC/004
311
Function diagrams 3UG4651
Display
Memory = no
Relay switching behavior = NC (closed-circuit principle)
Without Enable input
With Enable input
RPM = currently measured speed
rpm = set threshold for the speed
Note
The relay control for the open
-circuit principle NO is inverted to the represented function
diagrams in the
closed-circuit principle NC after application of the rated control supply
voltage U
S
.