9
2105267-10-08/20 (Translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-AH-C03-AE-LS
EN
8. Electrical connection
8.1. General notes
CAUTION
Risk of damage to equipment or malfunctions as a result of incorrect connection.
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The switch was developed for special installation conditions in construction machines. The compa-
ny distributing the installation must verify conformity with the EMC directive, taking the applicable
standards into account. All conducted disturbances that, according to section 4.9 of EN 13309,
can occur in power supplies must be filtered by upstream protective devices. Impermissibly high
voltage peaks on UB will damage the switch.
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To avoid faults, the cable must be laid with protection.
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The power for the operating voltage and for the LA and +LB must be provided from a
common power supply.
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All the electrical connections must either be isolated from the mains supply by a safety trans-
former according EN IEC 61558-2-6 with limited output voltage in the event of a fault, or by other
equivalent insulation measures.
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With inductive loads there can be voltage spikes of up to -50 V lasting several milliseconds on
switching off the outputs.
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To prevent overvoltages on the inputs and outputs for the safety circuits, inductive loads must be
connected with free-wheeling diodes (see chapter
8.10. Connection of the CES-AH on page 12)
.
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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.
8.2. Test pulses, pulsing and power control
Important!
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In operation the device regularly switches off the safety outputs for approx. 6 ms to check the
safe switching function. The loads connected must tolerate this behavior.
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A load connected is controlled using the safety paths +LA/LA and +LB/LB. The control voltage
can be pulsed for power control.
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Do not use a control system with pulsing to test the output cables or switch off the pulsing func-
tion in your control system.
8.3. Fault behavior
CAUTION
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In the event of a fault in the safety switch, the safety circuit is switched off and the DIA LED illumi-
nates red.
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After approx. 5 s the device performs a re-start.
Important!
If the device does not appear to function when operating voltage is applied (e.g. green STATE LED
does not flash), the safety switch must be returned unopened to the manufacturer.
