Siemens SIRIUS 3UG4 - Page 233

Function diagrams 3UG4651
Display Memory = no
Relay switching behavior = NC (closed-circuit principle)
Without Enable input With Enable input
rpm = off
>
rpm
>
A1-A2
RPM=0
rpm
Hyst
11/14
11/12
Del
Hyst
Del
!
> RPM
A1-A2
RPM=0
rpm
Hyst
11/14
11/12
Del
Hyst
Del
EN
!
> RPM
rpm = off
>
rpm
>
A1-A2
RPM=0
11/14
11/12
rpm
Hyst
Hyst
DelOnDel OnDel
!
< RPM
RPM=0
11/14
11/12
rpm
Hyst Hyst
DelOnDel OnDel
A1-A2
EN
!
< RPM
rpm
>
rpm
>
A1-A2
RPM=0
11/14
11/12
OnDel
Del
Hyst
Hyst
Del
!
> RPM
!
< RPM
rpm
rpm
RPM=0
11/14
11/12
OnDel
Del
Hyst
Hyst
Del
A1-A2
EN
!
> RPM
!
< RPM
rpm
rpm
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
.
3UG4651 speed monitoring relay
12.3 Functions
SIRIUS 3UG4 / 3RR2 monitoring relay
Equipment Manual, 07/2021, NEB927043002000/RS-AD/005 233