Connecting to a PLC
There is no need for protective measures by connecting the Reed switch to a PLC. The Reed con-
tacts are plated by Tunsten, Gold, and Rhodium located in a protective atmosphere. They can be dir-
ectly connected to the input terminals of a PLC without problems.
RC-Circuits as protective measures (Boucherot cell, Snubber)
In practice the following values of resistor/capacitor cells give good results. Nevertheless, the values
given in the following tables are only recommendations for general purposes. But it cannot be guar-
anteed that for specific applications more adequate Boucherot cells may exist.
For Reed switches of 10 – 40 VA
Voltage [V]
Resistance [Ohm]
Capacitance [nF]
230
1500
330
115
470
330
48
220
330
24
100
330
For Reed switches of 40 – 100 VA
Voltage [V]
Resistance [Ohm]
Capacitance [nF]
230
1000
330
115
470
330
48
100
330
24
47
330
DS09 Instruction manual 05/2018
page 12