5.6 Circuit diagrams
Internal circuit diagram
3UG4501-.A.30 level monitoring relays
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3UG4501
$
0
0D[
0LQ
Wiring examples
Drainage control
A1 (+)
A2 (–)
M
11
12 14
K1
AC/+U
AC/0V
3UG45 01
K1
Max Min
29
'HOD\5VHQV
Two-step control
A1 (+)
A2 (–)
M
11
12 14
K1
AC/+U
AC/0V
3UG45 01
Max Min
K1
29
'HOD\5VHQV
One-point closed-loop control
Inow control
A1 (+)
A2 (–)
M
11
12 14
K1
AC/+U
AC/0V
3UG45 01
Max Min
K1
81
'HOD\5VHQV
Two-step control
A1 (+)
A2 (–)
M
11
12 14
K1
AC/+U
AC/0V
3UG45 01
Max Min
K1
81
'HOD\5VHQV
One-point closed-loop control
3UG4501 lling level monitoring relay
5.6 Circuit diagrams
SIRIUS 3UG4 / 3RR2 monitoring relay
78 Equipment Manual, 07/2021, NEB927043002000/RS-AD/005