EUCHNER CES-A-S5H-01 (Unicode) - Manual (Page 12)

System Manual Safety System CES-A-S5H01
1
Warning!
Electrical connection may only be performed by authorized personnel trained
in EMC and with the device and wiring isolated.
The device is fully encapsulated, it is therefore not possible to remove the lid
from the housing. 
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Important!
If the device does not appear to function when operating voltage is applied (e.g.
green STATE LED does not illuminate or flash), the safety switch must be returned
unopened to the manufacturer.
Safety in case of faults
The operating voltage U
B
is reverse polarity protected.
The contacts LA/LB and -LA/-LB are short circuit-proof, however they are not
reverse polarity protected.
A short circuit between LA and LB can only be detected by external pulsing.
A short circuit in the cable can be excluded by laying the cable with protection.
The screen at the open end of the cable must also be connected electrically to
the machine ground.
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