Grundfos LCD 108 User Manual

6
AC/DC selector:
The AC/DC selector switch for electrodes and/or float switches is
placed as shown in fig. 3.
Fig. 3
If the distance between the controller and pit exceeds 20 metres,
it is not advisable to use electrodes as problems with the signal
values sent back to the controller may arise. In such cases, it is
recommended to use float switches.
TM02 5747 3902
Operation with electrodes and
float switches:
Selector switch in position AC:
It is possible to connect 3
electrodes (1 as reference
electrode) and 2 float switches.
The controller transmits a 13 to
18 VAC signal.
Operation with float switches:
Selector switch in position AC:
It is possible to connect 4 float
switches.
The controller transmits a 13 to
18 VAC signal.
Operation with float switches:
Selector switch in position DC:
It is possible to connect 4 float
switches.
Cables of up to 100 metres can be
connected between the controller
and the float switches.
The controller transmits a 12 VDC
signal.
AC 1 2
13-18 VAC
0 V
AC
DC
G3 4
AC 1 2
13-18 VAC
0 V
AC
DC
G3 4
AC 1 2
12 VDC
0 V
AC
DC
G3 4

Grundfos LCD 108 Specifications

General

Brand	Grundfos
Model	LCD 108
Category	Controller
Language	English