KROHNE LEM 300 EN - Manual (Page 4)

4 Installation and Operating Instructions LEM 300
1 Safety Instructions
This instrument is built and tested according to the specifications and packed in technically safe
condition. In order to maintain this condition and to ensure safe operation, the user shall follow the
hints and warnings given in this instruction.
WARNING
During the installation the valid national rules have to be observed.
Ignoring the warnings may lead to severe personal injury or substantial damage
to property.
The product shall be operated by trained staff. Correct and safe operation of this equipment is
dependent on proper transport, storage, installation and operation.
All electrical wiring shall conform to local standards. In order to prevent stray electrical radiation,
we recommend twisted and shielded input cables, as also to keep mains supply cables separated
from the input cables. The connection shall be made according to the connecting diagrams.
2 Description
The Double Level Control Unit has two independent, galvanically separated electrical circuits.
Each circuit controls a relay with Normally Open contacts. The status of each relay changes as a
function of the two resistance inputs.
The two inputs act with a hysteresis. The sensibility of the relay circuit can be adjusted from the
front of the module. LED´s indicates an activated relay.
The module can be used as an evaluation module for LS 7000 series sensors. Please refer to the
application example(s).