EUCHNER CES-A-W5H-01 (Multicode) - Manual (Page 12)

System Manual Safety System CES-A-W5H-01
1
Caution!
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 pro-
cessing. The cable routing for safety circuits should be as far away as pos-
sible from the cables of the power circuits.
If a common power supply is used, all the inductive and capacitive loads
(e.g. relay contactors) connected to the power supply must be connected to
appropriate interference suppressors. 
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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 device meets the necessary EMC regulations even with an unscreened
connection cable. For applications that are particularly sensitive to interfer-
ence, a screened cable can be connected to the screen bonding clamp. This
bonding clamp can be electrically connected to the machine ground via the
fastening screws. The screen at the open end of the cable must also be con-
nected electrically to the machine ground.
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