EUCHNER CETx-AR-xxx-AH-xxx (Unicode) - Manual (Page 29)

Operating Instructions Safety Switch CET.-AR-...-AH-...
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Always use input RST in series connections. All switches in a chain can be reset at
the same time with this reset input. To do this, a voltage of 24 V must be applied
to the RST input for at least 3 seconds. If input RST is not used in your application,
it should be connected to 0 V.
Note the following in this respect:
Ì A common signal must be used for all switches in the chain. This can be a
changeover switch or the output of a control system. A button is not suitable
because Reset must always be connected to GND during operation (see switch
S11 in Figure 12).
Ì Reset must always be performed simultaneously for all switches of the chain.
Information on operation in a mixed AR switch chain
The safety switch CET-AR has a longer risk time than a CES-AR switch (see section
Technical data and Typical system times).