Operating Instructions
Non-Contact Safety Switch CES-A-C5H-EX
14
(Translation of the original operating instructions) 2110182-09-12/18
10. Electrical connection
WARNING
Loss of the safety function due to incorrect connection.
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Not suitable for safety relays that realize short-circuit monitoring with different potentials (0 V/24
V). The voltage at +LA/+LB must correspond to the information in the technical data.
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+UB
0 V
OUT
0 V
+24 V
+LA
LA
+LB
LB
-LAB
S11
S12
S22
S21
A2
A1
CES-A-.5
WARNING
If there is a mistake, loss of the safety function due to incorrect connection.
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To ensure safety, both safety outputs must always be evaluated.
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Monitoring outputs must not be used as safety outputs.
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Lay the connection cables with protection to prevent the risk of short circuits.
WARNING
On use in potentially explosive atmospheres, there is a danger of explosion due to electrical sparks.
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Never connect or disconnect connector when live.
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Never apply electrical power to open connectors!
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Protection against mechanical effects on the switch:
-The connecting cable must be laid such that it is protected against mechanical damage.
-The connection cable must be laid rigidly; it is not permissible to lay the cable so that it can
move (e.g. in a drag chain).
-All the electrical connections must either be isolated from the mains supply by a safety trans-
former according to IEC 61558-2-6 with limited output voltage in the event of a fault, or by other
equivalent isolation measures (PELV).
CAUTION
Risk of damage to equipment or malfunctions as a result of incorrect connection.
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The inputs on an evaluation unit connected must be positive-switching, as the two outputs on the
safety switch deliver a level of +24 V in the switched-on state.
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All electrical outputs must have an adequate protective circuit for inductive loads. The outputs
must be protected with a free-wheeling diode for this purpose. RC interference suppression units
must not be used.
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Power devices which are a powerful source of interference must be installed in a separate location
away from the input and output circuits for signal processing. The cable routing for safety circuits
should be as far away as possible from the cables of the power circuits.
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To avoid EMC interference, the physical environmental and operating conditions at the in-
stallation site of the device must comply with the requirements according to the standard
EN 60204-1:2006, section 4.4.2 (EMC).