EN
14317448.02 12/2019 EN/DE/FR/ES
14
WIKA operating instructions models RLS-7000, RLS-8000
5. Commissioning, operation
Connection with inductive load
With inductive loads, the float switches should be protected by
connection to an RC element or a free-wheeling diode.
Protective RC elements
Depending on the operating voltage, use RC elements exclusively in
accordance with the table below. RC elements other than those specified
here will lead to the destruction of the reed switch.
RC elements for reed contacts 10 VA
Voltage
Resistance
Capacitance
Type of RC element
AC 24 V
100 Ω
0.33 μF
A 3/24
AC 48 V
220 Ω
0.33 μF
A 3/48
AC 115 V
470 Ω
0.33 μF
A 3/115
AC 230 V
1,500 Ω
0.33 μF
A 3/230
Connection with capacitive load
RC
element,
see table
S1
AC 24 ... 230 V
R
C
S1
DC 24 ... 230 V
+
–
AC voltage
DC voltage
Free-
wheeling
diode, e.g.
1N4007
R
S
= 220 Ω (for AC 230 V)
C₁ = internal capacitance
S1
R
S
+
–
C
1
AC 230 V
AC voltage current limitation
e.g. for electronic time relay
Relay