User guide

12 WIKA operating instructions mini limit switch, model LSO.02
13334591.02 10/2010 GB/D/F/E
GB
6. Commissioning, operation / 7. Maintenance and cleaning
6.2 Mechanical installation of the Mini Limit Switch
Mount the mini limit switch, pressure tight, into the process connection. The distance
between sensor-tip and opposite surface of the pipe should be greater than 10 mm. If the
pipe is electropolished, the distance should be increased accordingly.
6.3. Electrical connection of the mini limit switch
The sensor must be connected as shown in the connection diagram.
Electrical connection diagram
Connector assignment
Output
Output
brown
green
white
O. C. pnp
Load
Switching direction
The switching direction is factory set:
Model Function Condition LED Output transistor Ext. relay
SE Normally
open
immersed on switch on connect
SE Normally
open
not immersed o switch o disconnect
SA Normally
closed
immersed o switch o disconnect
SA Normally
closed
not immersed on switch on connect
7. Maintenance and cleaning
7.1 Maintenance
As a rule, the Mini Limit Switch is maintenance-free.
If the plant is subject to heavy contamination or scale, it is advisable to set up periodic
maintenance. This depends on the optical condition of the glass tip and the switch
operation.
Repairs must only be carried out by the manufacturer.