Electrical Connection - WIKA FLS Serie Betriebsanleitung

5.3 Electrical connection

 The electrical connection must only be made by qualified skilled person-
nel.
 Connection details and switching functions are given on the connection
diagram on the instrument and the connection terminals are appropriately
marked (exception: versions with only one normally closed or normally
open contact).
 Seal the cable gland at the connection housing.
 The mains connection lines to be provided must be dimensioned for max-
imum instrument current supply and comply with IEC 227 or IEC 245.
 The cables installed on the product are designed for fixed installation.
DANGER!
The electrical connection must be made in a de-energised
state.
WARNING!
Electrical connection errors of the float switches can destroy
the reed contacts. This can lead to a malfunction in the plant
and thus lead to injury to personnel or damage to equipment.
No direct operation in circuits with inductive loads.
No direct operation in circuits with capacitive loads, e.g. PLC,
PCS or cable lengths > 50 m.
Do not exceed the permissible switching power.
Information for Float switches which are marked as sim-
ple apparatus per EN 60079-11 section 5.7
Only for connection to a certified intrinsically safe circuit, Ex ia
or Ex ib, Ui ≤ 36 V, Ii ≤ 100 mA, Pi ≤ 0.84W
The electrical data on the type plate and the additional regula-
tions governing intrinsically safe circuits must be complied
with. This work must be done by trained specialist personnel.
To increase the service life of the contacts, we recommend
operation with a contact protection relay.
Operating instructions, float switch, model FLS 13