Endress+Hauser Liquisys CUM 252, Operating Instructions Manual, Page: 14 / 56

Connection diagram
Caution:
Do not connect the two signal outputs with each other! If you want to connect them
both to a PLC with common ground of all inputs, then you must anew isolate one
output galvanically.
15 V
86
85
97
88
87
49
48
47
59
58
57
43
42
41
L
N
L+
L
-
~ =
96
S
S
S
81
82
mA
32
31
TU
mA
34
33
gn
wt
bn
10-50 V
ye
UM2
5
2
A
3
E.
CDR
Sensor CUS 31
CUS 41
*) Contact
status
shown:
no current,
fault present
Hold input
Signal output 1: TU
Power supply
Relay 1
Relay 2
Alarm
*)
Liquisys CUM 252
Auxiliary supply voltage
(usable for hold input)
Signal output 2: temp.
*)
*) optional
Fig. 4.6 Electrical connection of Liquisys CUM 252
Installation liquisys CUM 252
12 Hauser