19
2119563-12-03/20 (Translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-I-AR-.-C04/C14-…
EN
9.10. Connection of several devices in a switch chain
Important!
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An AR switch chain may contain a maximum of 20 safety switches.
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The example shows only an excerpt that is relevant for the connection of the CES system.
The example illustrated here does not show complete system planning. The user is responsi-
ble for safe integration into the overall system. Detailed application examples can be found at
www.euchner.com. Simply enter the order number of your switch in the search box. You will find all
available connection examples for the device in Downloads.
The series connection is shown here based on the example of the version with plug connectors M12. The switches are con-
nected one behind the other with the aid of pre-assembled connecting cables and Y-distributors. If a safety door is opened or
if a fault occurs on one of the switches, the system shuts down the machine. A higher-level control system cannot, however,
detect which safety door is open or on which switch a fault has occurred with this connection technology. A special AR eval-
uation unit is required for this purpose (see chapter
9.11. Information on operation on an AR evaluation unit on page 21
).
The series connection can also be realized via additional terminals in a control cabinet.
The safety outputs are permanently assigned to the respective safety inputs of the downstream switch. FO1A must be routed
to FI1A and FO1B to FI1B. If the connections are interchanged (e.g. FO1A to FI1B), the device will switch to the fault state.
Always use the RST input 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 appli-
cation, it should be connected to 0 V.
Note the following on this aspect:
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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 pushbutton is not suitable because the reset must always be connected to GND during operation (see switch
S1 in
).
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Reset must always be performed simultaneously for all switches of the chain.
