11
Installation
Conductivity switch LRS 1-7
The housing of the conductivity switch LRS 1-7 is designed for wall mounting. To access the four
fixing holes loosen the cover screws
8
and remove the housing cover
9
. Attach the lower part of the
housing by means of suitable screws and wall plugs.
Electrical Connection
The conductivity electrode LRG 16-9 and the conductivity switch LRS 1-7 are equipped with M 12
sensor connectors with 5 poles and A coded; for connection see
Fig. 4 and Fig. 5.
For connecting the
equipment control cable assemblies (with male and female connectors) of various lengths are available
as add-on equipment.
Note that the recommended control cable is not UV-resistant and, if installed outdoors, must be
protected by a UV-resistant plastic tube or cable duct.
If the above-mentioned control cable assembly is not used, a screened five-core control cable, e. g.
Ölflex 110 CH, manufactured by Lapp, 5 x 0.5 mm
2
or LiYCY 5 x 0.5 mm
2
.
Max. cable length between conductivity electrode and switch: 30 m, with conductivites from
0.5 to 10 μS/cm: max. 10 m.
Connecting conductivity electrode LRG 16-9
Attention
n
If the above-mentioned control cable assembly is not used, the connecting line must
be provided with a connector and a screened jack according to the wiring diagram
Fig. 4
.
n
If you do not use the control cable assembly, make sure that the connecting cable
used for the installation meets the requirements of protection IP 65.
n
Connect screen
only
into the female connector (in electrode)
Connecting conductivity electrode ERL 16, LRG 16-4
Please note:
n
If GESTRA conductivity electrodes ERL 16, LRG 16-4 are used connect the control cable assembly
to the electrode connector.
n
Connect the screen in the connector of the conductivity electrode, see wiring diagram
Fig. 4 and Fig. 5
.
n
Set parameter 4. Pt 100 to OFF.
