5 Installation at Site
34 of 76
EtaLine Pro
1168.87/01-EN
5.7.3.6 Connecting the potential equalisation connection
1
Fig. 19:
PE connection
1. Connect the potential equalisation connection to the potential equalisation
system.
5.7.3.7 Analog input and digital input
In order to connect sensors or contacts, the electronics of the pump set supply
nominal PELV auxiliary voltages of 24 VDC.
The PELV supply is safely isolated from the power supply network and meets the
requirement for protection against electric shock in the case of indirect contact or
direct contact with a limited direct contact area. The PELV supply is not earthed in
the electronic system of the pump set and must be earthed externally by the installer.
If the ground (GND) potentials of several devices are connected to one another,
earthing must be provided at a central point.
30 31 32 33 34
+
U
h
1
(
+
2
4
V
)
+
U
h
2
(
+
2
4
V
)
D
I
1
D
I
2
G
N
D
Fig. 20:
Digital inputs
The individual auxiliary voltage outputs have separate current limiters and are
continuously short-circuit-proof.
41 42
47
43 44 45 46
48
U
h
3
(
+
2
3
V
)
U
h
4
(
+
2
3
V
)
A
I
1
I
+
/
U
A
I
1
I
-
G
N
D
A
I
2
I
+
/
U
A
I
2
I
-
G
N
D
U
U
0/2-10 V
0/2-10 V
Fig. 21:
Analog inputs 0/2-10 V
