WIKA RSM Mode D'emploi page 7

4. Electrical connection
Use of magnetic float switches with inductive or capacitive
load may lead to the destruction of the reed switch. This
may cause a malfunction to the control circuitry and harm
GB
to persons or goods.
With inductive load, magnetic switches have to be
connected to a RC Network (acc. to appendix).
With capacitive load, connecting cables longer than
50 m or connection to a PLC with capacitive input circuit,
a 22 Ω resp. 47 Ω (10 VA contacts) resistor is required to be
connected in series to limit current spikes. A 220 Ω resistor
shall be used when connected to an electronic timer.
Overloading the magnetic float switches may lead to
the destruction of the reed switch, which may cause a
malfunction to the control circuitry and harm to persons or
goods. The maximum switch capacity values given in the
chapter "Technical data" and the Technical bulletin must
not be exceeded.
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WIKA Operating instructions magnetic operated float switches Model RSM and HIF